From b793666ca56dc1a3cc9dc64773d08cd3a20f1801 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Gon=C3=A7alo=20Pestana?= <g6pestana@gmail.com>
Date: Thu, 23 Feb 2023 11:21:00 +0000
Subject: [PATCH] Abstracts elections-phragmen pallet to use NposSolver
 (#12588)

* Abstracts elections-phragmen pallet to use NposSolver

* Update frame/elections-phragmen/src/lib.rs

Co-authored-by: Kian Paimani <5588131+kianenigma@users.noreply.github.com>

* Update frame/elections-phragmen/src/lib.rs

Co-authored-by: Kian Paimani <5588131+kianenigma@users.noreply.github.com>

* changes the name of the pallet; adds changelog

* update changelog

* Adds weight testing

* Adds log macro_rules

* renames elections-phragment dir to elections

* weights rename

* fixes typo in cargo toml

* pre/post solve weight scafolding

* refactor do_post_election

* refactors into pre and post election solve for independent benchmarking

* deconstructs PreElectionResults struct

* updates benchmarking pre and post election solve; mock weights

* Update frame/elections/src/lib.rs

Co-authored-by: Kian Paimani <5588131+kianenigma@users.noreply.github.com>

* Update frame/elections/src/lib.rs

Co-authored-by: Kian Paimani <5588131+kianenigma@users.noreply.github.com>

* addresses PR comments

* adds pre_solve and post_sove weights

* Adds comments on election pallet id param name change

* ".git/.scripts/bench-bot.sh" pallet dev pallet_elections

* Finishes pre-post solve weights

* Update frame/elections/src/lib.rs

Co-authored-by: Kian Paimani <5588131+kianenigma@users.noreply.github.com>

* Update frame/elections/src/lib.rs

Co-authored-by: Kian Paimani <5588131+kianenigma@users.noreply.github.com>

* Addresses PR comments: no panic in on_init path; nits

* Fixes node build

* Implements approval voting to use as a `NposSolver` (#13367)

* Implements the approval voting methods in sp_npos_elections

* fmt

* remove unecessary file

* comment clarification

* re-run weights

* fix typo

* updates MaxVoters in tests for integrity_tests to pass

* Refactors election provider support benchmarks outside its own crate (#13431)

* Refactors election provider support benchmarks outside its own crate
---------

Co-authored-by: command-bot <>

---------

Co-authored-by: Kian Paimani <5588131+kianenigma@users.noreply.github.com>
Co-authored-by: parity-processbot <>
Co-authored-by: Ross Bulat <ross@parity.io>
---
 substrate/Cargo.lock                          | 265 ++++-----
 substrate/Cargo.toml                          |   3 +-
 substrate/bin/node/runtime/Cargo.toml         |  12 +-
 substrate/bin/node/runtime/src/lib.rs         |  30 +-
 .../election-provider-multi-phase/Cargo.toml  |   2 -
 .../election-provider-support/Cargo.toml      |   8 +-
 .../benchmarking/Cargo.toml                   |  37 --
 .../src/lib.rs => src/benchmarking.rs}        |  18 +-
 .../election-provider-support/src/lib.rs      |  26 +
 .../election-provider-support/src/onchain.rs  |  30 +-
 .../election-provider-support/src/weights.rs  | 147 +++--
 .../frame/elections-phragmen/src/weights.rs   | 559 ------------------
 .../CHANGELOG.md                              |  11 +
 .../Cargo.toml                                |   5 +-
 .../README.md                                 |   6 +-
 .../src/benchmarking.rs                       |  57 +-
 .../src/lib.rs                                | 482 +++++++++------
 .../src/migrations/mod.rs                     |   0
 .../src/migrations/v3.rs                      |   0
 .../src/migrations/v4.rs                      |   0
 .../src/migrations/v5.rs                      |   0
 substrate/frame/elections/src/weights.rs      | 397 +++++++++++++
 .../npos-elections/src/approval_voting.rs     |  79 +++
 .../primitives/npos-elections/src/lib.rs      |   4 +
 .../primitives/npos-elections/src/phragmen.rs |   2 +-
 .../primitives/npos-elections/src/tests.rs    |  49 +-
 substrate/scripts/run_all_benchmarks.sh       |   2 -
 .../frame/remote-externalities/Cargo.toml     |   2 +-
 28 files changed, 1206 insertions(+), 1027 deletions(-)
 delete mode 100644 substrate/frame/election-provider-support/benchmarking/Cargo.toml
 rename substrate/frame/election-provider-support/{benchmarking/src/lib.rs => src/benchmarking.rs} (86%)
 delete mode 100644 substrate/frame/elections-phragmen/src/weights.rs
 rename substrate/frame/{elections-phragmen => elections}/CHANGELOG.md (80%)
 rename substrate/frame/{elections-phragmen => elections}/Cargo.toml (90%)
 rename substrate/frame/{elections-phragmen => elections}/README.md (94%)
 rename substrate/frame/{elections-phragmen => elections}/src/benchmarking.rs (85%)
 rename substrate/frame/{elections-phragmen => elections}/src/lib.rs (90%)
 rename substrate/frame/{elections-phragmen => elections}/src/migrations/mod.rs (100%)
 rename substrate/frame/{elections-phragmen => elections}/src/migrations/v3.rs (100%)
 rename substrate/frame/{elections-phragmen => elections}/src/migrations/v4.rs (100%)
 rename substrate/frame/{elections-phragmen => elections}/src/migrations/v5.rs (100%)
 create mode 100644 substrate/frame/elections/src/weights.rs
 create mode 100644 substrate/primitives/npos-elections/src/approval_voting.rs

diff --git a/substrate/Cargo.lock b/substrate/Cargo.lock
index 6326d1ffdf6..e485a651225 100644
--- a/substrate/Cargo.lock
+++ b/substrate/Cargo.lock
@@ -27,7 +27,7 @@ version = "0.19.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a76fd60b23679b7d19bd066031410fb7e458ccc5e958eb5c325888ce4baedc97"
 dependencies = [
- "gimli 0.27.1",
+ "gimli 0.27.2",
 ]
 
 [[package]]
@@ -246,7 +246,7 @@ dependencies = [
  "num-traits",
  "rusticata-macros",
  "thiserror",
- "time 0.3.17",
+ "time 0.3.19",
 ]
 
 [[package]]
@@ -262,7 +262,7 @@ dependencies = [
  "num-traits",
  "rusticata-macros",
  "thiserror",
- "time 0.3.17",
+ "time 0.3.19",
 ]
 
 [[package]]
@@ -358,19 +358,20 @@ dependencies = [
 
 [[package]]
 name = "async-stream"
-version = "0.3.3"
+version = "0.3.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "dad5c83079eae9969be7fadefe640a1c566901f05ff91ab221de4b6f68d9507e"
+checksum = "ad445822218ce64be7a341abfb0b1ea43b5c23aa83902542a4542e78309d8e5e"
 dependencies = [
  "async-stream-impl",
  "futures-core",
+ "pin-project-lite 0.2.9",
 ]
 
 [[package]]
 name = "async-stream-impl"
-version = "0.3.3"
+version = "0.3.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "10f203db73a71dfa2fb6dd22763990fa26f3d2625a6da2da900d23b87d26be27"
+checksum = "e4655ae1a7b0cdf149156f780c5bf3f1352bc53cbd9e0a361a7ef7b22947e965"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -579,9 +580,9 @@ dependencies = [
 
 [[package]]
 name = "bindgen"
-version = "0.60.1"
+version = "0.64.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "062dddbc1ba4aca46de6338e2bf87771414c335f7b2f2036e8f3e9befebf88e6"
+checksum = "c4243e6031260db77ede97ad86c27e501d646a27ab57b59a574f725d98ab1fb4"
 dependencies = [
  "bitflags",
  "cexpr",
@@ -594,6 +595,7 @@ dependencies = [
  "regex",
  "rustc-hash",
  "shlex",
+ "syn",
 ]
 
 [[package]]
@@ -625,24 +627,24 @@ dependencies = [
 
 [[package]]
 name = "blake2b_simd"
-version = "1.0.0"
+version = "1.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "72936ee4afc7f8f736d1c38383b56480b5497b4617b4a77bdbf1d2ababc76127"
+checksum = "3c2f0dc9a68c6317d884f97cc36cf5a3d20ba14ce404227df55e1af708ab04bc"
 dependencies = [
  "arrayref",
  "arrayvec 0.7.2",
- "constant_time_eq 0.1.5",
+ "constant_time_eq",
 ]
 
 [[package]]
 name = "blake2s_simd"
-version = "1.0.0"
+version = "1.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "db539cc2b5f6003621f1cd9ef92d7ded8ea5232c7de0f9faa2de251cd98730d4"
+checksum = "6637f448b9e61dfadbdcbae9a885fadee1f3eaffb1f8d3c1965d3ade8bdfd44f"
 dependencies = [
  "arrayref",
  "arrayvec 0.7.2",
- "constant_time_eq 0.1.5",
+ "constant_time_eq",
 ]
 
 [[package]]
@@ -655,7 +657,7 @@ dependencies = [
  "arrayvec 0.7.2",
  "cc",
  "cfg-if",
- "constant_time_eq 0.2.4",
+ "constant_time_eq",
 ]
 
 [[package]]
@@ -715,9 +717,9 @@ checksum = "8d696c370c750c948ada61c69a0ee2cbbb9c50b1019ddb86d9317157a99c2cae"
 
 [[package]]
 name = "bounded-collections"
-version = "0.1.4"
+version = "0.1.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "de2aff4807e40f478132150d80b031f2461d88f061851afcab537d7600c24120"
+checksum = "a071c348a5ef6da1d3a87166b408170b46002382b1dda83992b5c2208cefb370"
 dependencies = [
  "log",
  "parity-scale-codec",
@@ -733,9 +735,9 @@ checksum = "771fe0050b883fcc3ea2359b1a96bcfbc090b7116eae7c3c512c7a083fdf23d3"
 
 [[package]]
 name = "bstr"
-version = "1.2.0"
+version = "1.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b7f0778972c64420fdedc63f09919c8a88bda7b25135357fd25a5d9f3257e832"
+checksum = "5ffdb39cb703212f3c11973452c2861b972f757b021158f3516ba10f2fa8b2c1"
 dependencies = [
  "memchr",
  "once_cell",
@@ -917,7 +919,7 @@ name = "chain-spec-builder"
 version = "2.0.0"
 dependencies = [
  "ansi_term",
- "clap 4.1.4",
+ "clap 4.1.6",
  "node-cli",
  "rand 0.8.5",
  "sc-chain-spec",
@@ -1010,9 +1012,9 @@ dependencies = [
 
 [[package]]
 name = "clang-sys"
-version = "1.4.0"
+version = "1.6.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fa2e27ae6ab525c3d369ded447057bca5438d86dc3a68f6faafb8269ba82ebf3"
+checksum = "77ed9a53e5d4d9c573ae844bfac6872b159cb1d1585a83b29e7a64b7eef7332a"
 dependencies = [
  "glob",
  "libc",
@@ -1033,9 +1035,9 @@ dependencies = [
 
 [[package]]
 name = "clap"
-version = "4.1.4"
+version = "4.1.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f13b9c79b5d1dd500d20ef541215a6423c75829ef43117e1b4d17fd8af0b5d76"
+checksum = "ec0b0588d44d4d63a87dbd75c136c166bbfd9a86a31cb89e09906521c7d3f5e3"
 dependencies = [
  "bitflags",
  "clap_derive",
@@ -1048,11 +1050,11 @@ dependencies = [
 
 [[package]]
 name = "clap_complete"
-version = "4.1.1"
+version = "4.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3d6540eedc41f8a5a76cf3d8d458057dcdf817be4158a55b5f861f7a5483de75"
+checksum = "bd125be87bf4c255ebc50de0b7f4d2a6201e8ac3dc86e39c0ad081dc5e7236fe"
 dependencies = [
- "clap 4.1.4",
+ "clap 4.1.6",
 ]
 
 [[package]]
@@ -1122,12 +1124,6 @@ version = "0.9.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "cec318a675afcb6a1ea1d4340e2d377e56e47c266f28043ceccbf4412ddfdd3b"
 
-[[package]]
-name = "constant_time_eq"
-version = "0.1.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "245097e9a4535ee1e3e3931fcfcd55a796a44c643e8596ff6566d68f09b87bbc"
-
 [[package]]
 name = "constant_time_eq"
 version = "0.2.4"
@@ -1515,9 +1511,9 @@ dependencies = [
 
 [[package]]
 name = "cxx"
-version = "1.0.89"
+version = "1.0.91"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bc831ee6a32dd495436e317595e639a587aa9907bef96fe6e6abc290ab6204e9"
+checksum = "86d3488e7665a7a483b57e25bdd90d0aeb2bc7608c8d0346acf2ad3f1caf1d62"
 dependencies = [
  "cc",
  "cxxbridge-flags",
@@ -1527,9 +1523,9 @@ dependencies = [
 
 [[package]]
 name = "cxx-build"
-version = "1.0.89"
+version = "1.0.91"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "94331d54f1b1a8895cd81049f7eaaaef9d05a7dcb4d1fd08bf3ff0806246789d"
+checksum = "48fcaf066a053a41a81dfb14d57d99738b767febb8b735c3016e469fac5da690"
 dependencies = [
  "cc",
  "codespan-reporting",
@@ -1542,15 +1538,15 @@ dependencies = [
 
 [[package]]
 name = "cxxbridge-flags"
-version = "1.0.89"
+version = "1.0.91"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "48dcd35ba14ca9b40d6e4b4b39961f23d835dbb8eed74565ded361d93e1feb8a"
+checksum = "a2ef98b8b717a829ca5603af80e1f9e2e48013ab227b68ef37872ef84ee479bf"
 
 [[package]]
 name = "cxxbridge-macro"
-version = "1.0.89"
+version = "1.0.91"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "81bbeb29798b407ccd82a3324ade1a7286e0d29851475990b612670f6f5124d2"
+checksum = "086c685979a698443656e5cf7856c95c642295a38599f12fb1ff76fb28d19892"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -2051,9 +2047,9 @@ checksum = "4443176a9f2c162692bd3d352d745ef9413eec5782a80d8fd6f8a1ac692a07f7"
 
 [[package]]
 name = "fastrand"
-version = "1.8.0"
+version = "1.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a7a407cfaa3385c4ae6b23e84623d48c2798d06e3e6a1878f7f59f17b3f86499"
+checksum = "e51093e27b0797c359783294ca4f0a911c270184cb10f85783b118614a1501be"
 dependencies = [
  "instant",
 ]
@@ -2095,14 +2091,14 @@ dependencies = [
 
 [[package]]
 name = "filetime"
-version = "0.2.19"
+version = "0.2.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4e884668cd0c7480504233e951174ddc3b382f7c2666e3b7310b5c4e7b0c37f9"
+checksum = "8a3de6e8d11b22ff9edc6d916f890800597d60f8b2da1caf2955c274638d6412"
 dependencies = [
  "cfg-if",
  "libc",
  "redox_syscall",
- "windows-sys 0.42.0",
+ "windows-sys 0.45.0",
 ]
 
 [[package]]
@@ -2222,7 +2218,7 @@ dependencies = [
  "Inflector",
  "array-bytes",
  "chrono",
- "clap 4.1.4",
+ "clap 4.1.6",
  "comfy-table",
  "frame-benchmarking",
  "frame-support",
@@ -2295,6 +2291,7 @@ dependencies = [
 name = "frame-election-provider-support"
 version = "4.0.0-dev"
 dependencies = [
+ "frame-benchmarking",
  "frame-election-provider-solution-type",
  "frame-support",
  "frame-system",
@@ -2313,7 +2310,7 @@ dependencies = [
 name = "frame-election-solution-type-fuzzer"
 version = "2.0.0-alpha.5"
 dependencies = [
- "clap 4.1.4",
+ "clap 4.1.6",
  "frame-election-provider-solution-type",
  "frame-election-provider-support",
  "frame-support",
@@ -2366,7 +2363,7 @@ dependencies = [
  "frame-support",
  "futures",
  "log",
- "pallet-elections-phragmen",
+ "pallet-elections",
  "parity-scale-codec",
  "serde",
  "sp-core",
@@ -2796,9 +2793,9 @@ dependencies = [
 
 [[package]]
 name = "gimli"
-version = "0.27.1"
+version = "0.27.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "221996f774192f0f718773def8201c4ae31f02616a54ccfc2d358bb0e5cefdec"
+checksum = "ad0a93d233ebf96623465aad4046a8d3aa4da22d4f4beba5388838c8a434bbb4"
 
 [[package]]
 name = "git2"
@@ -2941,9 +2938,9 @@ dependencies = [
 
 [[package]]
 name = "hermit-abi"
-version = "0.3.0"
+version = "0.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "856b5cb0902c2b6d65d5fd97dfa30f9b70c7538e770b98eab5ed52d8db923e01"
+checksum = "fed44880c466736ef9a5c5b5facefb5ed0785676d0c02d612db14e54f0d84286"
 
 [[package]]
 name = "hex"
@@ -3035,9 +3032,9 @@ dependencies = [
 
 [[package]]
 name = "http"
-version = "0.2.8"
+version = "0.2.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "75f43d41e26995c17e71ee126451dd3941010b0514a81a9d11f3b341debc2399"
+checksum = "bd6effc99afb63425aff9b05836f029929e345a6148a14b7ecd5ab67af944482"
 dependencies = [
  "bytes",
  "fnv",
@@ -3321,7 +3318,7 @@ version = "0.4.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "22e18b0a45d56fe973d6db23972bf5bc46f988a4a2385deac9cc29572f09daef"
 dependencies = [
- "hermit-abi 0.3.0",
+ "hermit-abi 0.3.1",
  "io-lifetimes",
  "rustix",
  "windows-sys 0.45.0",
@@ -3547,8 +3544,7 @@ dependencies = [
  "pallet-conviction-voting",
  "pallet-democracy",
  "pallet-election-provider-multi-phase",
- "pallet-election-provider-support-benchmarking",
- "pallet-elections-phragmen",
+ "pallet-elections",
  "pallet-fast-unstake",
  "pallet-glutton",
  "pallet-grandpa",
@@ -4113,9 +4109,9 @@ dependencies = [
 
 [[package]]
 name = "librocksdb-sys"
-version = "0.8.0+7.4.4"
+version = "0.8.3+7.4.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "611804e4666a25136fcc5f8cf425ab4d26c7f74ea245ffe92ea23b85b6420b5d"
+checksum = "557b255ff04123fcc176162f56ed0c9cd42d8f357cf55b3fabeb60f7413741b3"
 dependencies = [
  "bindgen",
  "bzip2-sys",
@@ -4374,9 +4370,9 @@ dependencies = [
 
 [[package]]
 name = "memmap2"
-version = "0.5.8"
+version = "0.5.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4b182332558b18d807c4ce1ca8ca983b34c3ee32765e47b3f0f69b90355cc1dc"
+checksum = "2af2c65375e552a67fe3829ca63e8a7c27a378a62824594f43b2851d682b5ec2"
 dependencies = [
  "libc",
 ]
@@ -4444,14 +4440,14 @@ dependencies = [
 
 [[package]]
 name = "mio"
-version = "0.8.5"
+version = "0.8.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e5d732bc30207a6423068df043e3d02e0735b155ad7ce1a6f76fe2baa5b158de"
+checksum = "5b9d9a46eff5b4ff64b45a9e316a6d1e0bc719ef429cbec4dc630684212bfdf9"
 dependencies = [
  "libc",
  "log",
  "wasi 0.11.0+wasi-snapshot-preview1",
- "windows-sys 0.42.0",
+ "windows-sys 0.45.0",
 ]
 
 [[package]]
@@ -4733,7 +4729,7 @@ name = "node-bench"
 version = "0.9.0-dev"
 dependencies = [
  "array-bytes",
- "clap 4.1.4",
+ "clap 4.1.6",
  "derive_more",
  "fs_extra",
  "futures",
@@ -4770,7 +4766,7 @@ version = "3.0.0-dev"
 dependencies = [
  "array-bytes",
  "assert_cmd",
- "clap 4.1.4",
+ "clap 4.1.6",
  "clap_complete",
  "criterion",
  "frame-benchmarking-cli",
@@ -4890,7 +4886,7 @@ dependencies = [
 name = "node-inspect"
 version = "0.9.0-dev"
 dependencies = [
- "clap 4.1.4",
+ "clap 4.1.6",
  "parity-scale-codec",
  "sc-cli",
  "sc-client-api",
@@ -4949,7 +4945,7 @@ dependencies = [
 name = "node-runtime-generate-bags"
 version = "3.0.0"
 dependencies = [
- "clap 4.1.4",
+ "clap 4.1.6",
  "generate-bags",
  "kitchensink-runtime",
 ]
@@ -4958,7 +4954,7 @@ dependencies = [
 name = "node-template"
 version = "4.0.0-dev"
 dependencies = [
- "clap 4.1.4",
+ "clap 4.1.6",
  "frame-benchmarking",
  "frame-benchmarking-cli",
  "frame-system",
@@ -5214,9 +5210,9 @@ dependencies = [
 
 [[package]]
 name = "once_cell"
-version = "1.17.0"
+version = "1.17.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6f61fba1741ea2b3d6a1e3178721804bb716a68a6aeba1149b5d52e3d464ea66"
+checksum = "b7e5500299e16ebb147ae15a00a942af264cf3688f47923b8fc2cd5858f23ad3"
 
 [[package]]
 name = "oorandom"
@@ -5722,7 +5718,6 @@ dependencies = [
  "frame-system",
  "log",
  "pallet-balances",
- "pallet-election-provider-support-benchmarking",
  "parity-scale-codec",
  "parking_lot 0.12.1",
  "rand 0.8.5",
@@ -5738,22 +5733,11 @@ dependencies = [
 ]
 
 [[package]]
-name = "pallet-election-provider-support-benchmarking"
-version = "4.0.0-dev"
-dependencies = [
- "frame-benchmarking",
- "frame-election-provider-support",
- "frame-system",
- "parity-scale-codec",
- "sp-npos-elections",
- "sp-runtime",
-]
-
-[[package]]
-name = "pallet-elections-phragmen"
+name = "pallet-elections"
 version = "5.0.0-dev"
 dependencies = [
  "frame-benchmarking",
+ "frame-election-provider-support",
  "frame-support",
  "frame-system",
  "log",
@@ -6793,9 +6777,9 @@ dependencies = [
 
 [[package]]
 name = "parity-scale-codec"
-version = "3.3.0"
+version = "3.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c3840933452adf7b3b9145e27086a5a3376c619dca1a21b1e5a5af0d54979bed"
+checksum = "637935964ff85a605d114591d4d2c13c5d1ba2806dae97cea6bf180238a749ac"
 dependencies = [
  "arrayvec 0.7.2",
  "bitvec",
@@ -6940,9 +6924,9 @@ checksum = "478c572c3d73181ff3c2539045f6eb99e5491218eae919370993b890cdbdd98e"
 
 [[package]]
 name = "pest"
-version = "2.5.4"
+version = "2.5.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4ab62d2fa33726dbe6321cc97ef96d8cde531e3eeaf858a058de53a8a6d40d8f"
+checksum = "028accff104c4e513bad663bbcd2ad7cfd5304144404c31ed0a77ac103d00660"
 dependencies = [
  "thiserror",
  "ucd-trie",
@@ -6950,9 +6934,9 @@ dependencies = [
 
 [[package]]
 name = "pest_derive"
-version = "2.5.4"
+version = "2.5.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8bf026e2d0581559db66d837fe5242320f525d85c76283c61f4d51a1238d65ea"
+checksum = "2ac3922aac69a40733080f53c1ce7f91dcf57e1a5f6c52f421fadec7fbdc4b69"
 dependencies = [
  "pest",
  "pest_generator",
@@ -6960,9 +6944,9 @@ dependencies = [
 
 [[package]]
 name = "pest_generator"
-version = "2.5.4"
+version = "2.5.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2b27bd18aa01d91c8ed2b61ea23406a676b42d82609c6e2581fba42f0c15f17f"
+checksum = "d06646e185566b5961b4058dd107e0a7f56e77c3f484549fb119867773c0f202"
 dependencies = [
  "pest",
  "pest_meta",
@@ -6973,9 +6957,9 @@ dependencies = [
 
 [[package]]
 name = "pest_meta"
-version = "2.5.4"
+version = "2.5.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9f02b677c1859756359fc9983c2e56a0237f18624a3789528804406b7e915e5d"
+checksum = "e6f60b2ba541577e2a0c307c8f39d1439108120eb7903adeb6497fa880c59616"
 dependencies = [
  "once_cell",
  "pest",
@@ -7547,7 +7531,7 @@ checksum = "6413f3de1edee53342e6138e75b56d32e7bc6e332b3bd62d497b1929d4cfbcdd"
 dependencies = [
  "pem",
  "ring",
- "time 0.3.17",
+ "time 0.3.19",
  "x509-parser 0.13.2",
  "yasna",
 ]
@@ -7560,7 +7544,7 @@ checksum = "ffbe84efe2f38dea12e9bfc1f65377fdf03e53a18cb3b995faedf7934c7e785b"
 dependencies = [
  "pem",
  "ring",
- "time 0.3.17",
+ "time 0.3.19",
  "yasna",
 ]
 
@@ -8034,7 +8018,7 @@ version = "0.10.0-dev"
 dependencies = [
  "array-bytes",
  "chrono",
- "clap 4.1.4",
+ "clap 4.1.6",
  "fdlimit",
  "futures",
  "futures-timer",
@@ -9069,7 +9053,7 @@ dependencies = [
 name = "sc-storage-monitor"
 version = "0.1.0"
 dependencies = [
- "clap 4.1.4",
+ "clap 4.1.6",
  "futures",
  "log",
  "nix 0.26.2",
@@ -9465,9 +9449,9 @@ dependencies = [
 
 [[package]]
 name = "serde_json"
-version = "1.0.92"
+version = "1.0.93"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7434af0dc1cbd59268aa98b4c22c131c0584d2232f6fb166efb993e2832e896a"
+checksum = "cad406b69c91885b5107daf2c29572f6c8cdb3c66826821e286c533490c0bc76"
 dependencies = [
  "itoa",
  "ryu",
@@ -9550,9 +9534,9 @@ checksum = "43b2853a4d09f215c24cc5489c992ce46052d359b5109343cbafbf26bc62f8a3"
 
 [[package]]
 name = "signal-hook-registry"
-version = "1.4.0"
+version = "1.4.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e51e73328dc4ac0c7ccbda3a494dfa03df1de2f46018127f60c693f2648455b0"
+checksum = "d8229b473baa5980ac72ef434c4415e70c4b5e71b423043adb4ba059f89c99a1"
 dependencies = [
  "libc",
 ]
@@ -9582,9 +9566,9 @@ dependencies = [
 
 [[package]]
 name = "slab"
-version = "0.4.7"
+version = "0.4.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4614a76b2a8be0058caa9dbbaf66d988527d86d003c11a94fbd335d7661edcef"
+checksum = "6528351c9bc8ab22353f9d776db39a20288e8d6c37ef8cfe3317cf875eecfc2d"
 dependencies = [
  "autocfg",
 ]
@@ -10128,7 +10112,7 @@ dependencies = [
 name = "sp-npos-elections-fuzzer"
 version = "2.0.0-alpha.5"
 dependencies = [
- "clap 4.1.4",
+ "clap 4.1.6",
  "honggfuzz",
  "parity-scale-codec",
  "rand 0.8.5",
@@ -10485,9 +10469,9 @@ checksum = "6e63cff320ae2c57904679ba7cb63280a3dc4613885beafb148ee7bf9aa9042d"
 
 [[package]]
 name = "spin"
-version = "0.9.4"
+version = "0.9.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7f6002a767bff9e83f8eeecf883ecb8011875a21ae8da43bffb817a57e78cc09"
+checksum = "7dccf47db1b41fa1573ed27ccf5e08e3ca771cb994f776668c5ebda893b248fc"
 
 [[package]]
 name = "spki"
@@ -10605,7 +10589,7 @@ dependencies = [
 name = "subkey"
 version = "3.0.0"
 dependencies = [
- "clap 4.1.4",
+ "clap 4.1.6",
  "sc-cli",
 ]
 
@@ -10633,7 +10617,7 @@ dependencies = [
 name = "substrate-frame-cli"
 version = "4.0.0-dev"
 dependencies = [
- "clap 4.1.4",
+ "clap 4.1.6",
  "frame-support",
  "frame-system",
  "sc-cli",
@@ -10943,9 +10927,9 @@ checksum = "55937e1799185b12863d447f42597ed69d9928686b8d88a1df17376a097d8369"
 
 [[package]]
 name = "target-lexicon"
-version = "0.12.5"
+version = "0.12.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9410d0f6853b1d94f0e519fb95df60f29d2c1eff2d921ffdf01a4c8a3b54f12d"
+checksum = "8ae9980cab1db3fceee2f6c6f643d5d8de2997c58ee8d25fb0cc8a9e9e7348e5"
 
 [[package]]
 name = "tempfile"
@@ -11010,10 +10994,11 @@ checksum = "3bf63baf9f5039dadc247375c29eb13706706cfde997d0330d05aa63a77d8820"
 
 [[package]]
 name = "thread_local"
-version = "1.1.4"
+version = "1.1.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5516c27b78311c50bf42c071425c560ac799b11c30b31f87e3081965fe5e0180"
+checksum = "3fdd6f064ccff2d6567adcb3873ca630700f00b5ad3f060c25b5dcfd9a4ce152"
 dependencies = [
+ "cfg-if",
  "once_cell",
 ]
 
@@ -11049,9 +11034,9 @@ dependencies = [
 
 [[package]]
 name = "time"
-version = "0.3.17"
+version = "0.3.19"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a561bf4617eebd33bca6434b988f39ed798e527f51a1e797d0ee4f61c0a38376"
+checksum = "53250a3b3fed8ff8fd988587d8925d26a83ac3845d9e03b220b37f34c2b8d6c2"
 dependencies = [
  "itoa",
  "serde",
@@ -11067,9 +11052,9 @@ checksum = "2e153e1f1acaef8acc537e68b44906d2db6436e2b35ac2c6b42640fff91f00fd"
 
 [[package]]
 name = "time-macros"
-version = "0.2.6"
+version = "0.2.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d967f99f534ca7e495c575c62638eebc2898a8c84c119b89e250477bc4ba16b2"
+checksum = "a460aeb8de6dcb0f381e1ee05f1cd56fcf5a5f6eb8187ff3d8f0b11078d38b7c"
 dependencies = [
  "time-core",
 ]
@@ -11171,9 +11156,9 @@ dependencies = [
 
 [[package]]
 name = "tokio-stream"
-version = "0.1.11"
+version = "0.1.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d660770404473ccd7bc9f8b28494a811bc18542b915c0855c51e8f419d5223ce"
+checksum = "8fb52b74f05dbf495a8fba459fdc331812b96aa086d9eb78101fa0d4569c3313"
 dependencies = [
  "futures-core",
  "pin-project-lite 0.2.9",
@@ -11196,9 +11181,9 @@ dependencies = [
 
 [[package]]
 name = "tokio-util"
-version = "0.7.4"
+version = "0.7.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0bb2e075f03b3d66d8d8785356224ba688d2906a371015e225beeb65ca92c740"
+checksum = "5427d89453009325de0d8f342c9490009f76e999cb7672d77e46267448f7e6b2"
 dependencies = [
  "bytes",
  "futures-core",
@@ -11470,7 +11455,7 @@ name = "try-runtime-cli"
 version = "0.10.0-dev"
 dependencies = [
  "async-trait",
- "clap 4.1.4",
+ "clap 4.1.6",
  "frame-remote-externalities",
  "frame-try-runtime",
  "hex",
@@ -11815,9 +11800,9 @@ checksum = "0046fef7e28c3804e5e38bfa31ea2a0f73905319b677e57ebe37e49358989b5d"
 
 [[package]]
 name = "wasm-encoder"
-version = "0.22.1"
+version = "0.24.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9a584273ccc2d9311f1dd19dc3fb26054661fa3e373d53ede5d1144ba07a9acd"
+checksum = "704553b4d614a47080b4a457a976b3c16174b19ce95b931b847561b590dd09ba"
 dependencies = [
  "leb128",
 ]
@@ -11913,7 +11898,7 @@ version = "0.20.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "01bf50edb2ea9d922aa75a7bf3c15e26a6c9e2d18c56e862b49737a582901729"
 dependencies = [
- "spin 0.9.4",
+ "spin 0.9.5",
  "wasmi_arena",
  "wasmi_core 0.5.0",
  "wasmparser-nostd",
@@ -12158,9 +12143,9 @@ dependencies = [
 
 [[package]]
 name = "wast"
-version = "52.0.3"
+version = "54.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "15942180f265280eede7bc38b239e9770031d1821c02d905284216c645316430"
+checksum = "f0d3df4a63b10958fe98ab9d7e9a57a7bc900209d2b4edd10535bfb0703e6516"
 dependencies = [
  "leb128",
  "memchr",
@@ -12170,9 +12155,9 @@ dependencies = [
 
 [[package]]
 name = "wat"
-version = "1.0.57"
+version = "1.0.59"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "37212100d4cbe6f0f6ff6e707f1e5a5b5b675f0451231ed9e4235e234e127ed3"
+checksum = "3e9a7c7d177696d0548178c36e377d49eba54170e885801d4270e2d44e82ac84"
 dependencies = [
  "wast",
 ]
@@ -12242,7 +12227,7 @@ dependencies = [
  "sha2 0.10.6",
  "stun",
  "thiserror",
- "time 0.3.17",
+ "time 0.3.19",
  "tokio",
  "turn",
  "url",
@@ -12315,9 +12300,9 @@ dependencies = [
 
 [[package]]
 name = "webrtc-ice"
-version = "0.9.0"
+version = "0.9.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "494483fbb2f5492620871fdc78b084aed8807377f6e3fe88b2e49f0a9c9c41d7"
+checksum = "465a03cc11e9a7d7b4f9f99870558fe37a102b65b93f8045392fef7c67b39e80"
 dependencies = [
  "arc-swap",
  "async-trait",
@@ -12675,7 +12660,7 @@ dependencies = [
  "ring",
  "rusticata-macros",
  "thiserror",
- "time 0.3.17",
+ "time 0.3.19",
 ]
 
 [[package]]
@@ -12693,7 +12678,7 @@ dependencies = [
  "oid-registry 0.6.1",
  "rusticata-macros",
  "thiserror",
- "time 0.3.17",
+ "time 0.3.19",
 ]
 
 [[package]]
@@ -12722,7 +12707,7 @@ version = "0.5.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "aed2e7a52e3744ab4d0c05c20aa065258e84c49fd4226f5191b2ed29712710b4"
 dependencies = [
- "time 0.3.17",
+ "time 0.3.19",
 ]
 
 [[package]]
@@ -12767,9 +12752,9 @@ dependencies = [
 
 [[package]]
 name = "zstd-sys"
-version = "2.0.6+zstd.1.5.2"
+version = "2.0.7+zstd.1.5.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "68a3f9792c0c3dc6c165840a75f47ae1f4da402c2d006881129579f6597e801b"
+checksum = "94509c3ba2fe55294d752b79842c530ccfab760192521df74a081a78d2b3c7f5"
 dependencies = [
  "cc",
  "libc",
diff --git a/substrate/Cargo.toml b/substrate/Cargo.toml
index 89a52fd16cd..2ae924bf6e1 100644
--- a/substrate/Cargo.toml
+++ b/substrate/Cargo.toml
@@ -97,10 +97,9 @@ members = [
 	"frame/democracy",
 	"frame/fast-unstake",
 	"frame/try-runtime",
-	"frame/elections-phragmen",
+	"frame/elections",
 	"frame/election-provider-multi-phase",
 	"frame/election-provider-support",
-	"frame/election-provider-support/benchmarking",
 	"frame/election-provider-support/solution-type",
 	"frame/election-provider-support/solution-type/fuzzer",
 	"frame/examples/basic",
diff --git a/substrate/bin/node/runtime/Cargo.toml b/substrate/bin/node/runtime/Cargo.toml
index 37a99414b5d..d7b42efd4d2 100644
--- a/substrate/bin/node/runtime/Cargo.toml
+++ b/substrate/bin/node/runtime/Cargo.toml
@@ -66,8 +66,7 @@ pallet-contracts-primitives = { version = "7.0.0", default-features = false, pat
 pallet-conviction-voting = { version = "4.0.0-dev", default-features = false, path = "../../../frame/conviction-voting" }
 pallet-democracy = { version = "4.0.0-dev", default-features = false, path = "../../../frame/democracy" }
 pallet-election-provider-multi-phase = { version = "4.0.0-dev", default-features = false, path = "../../../frame/election-provider-multi-phase" }
-pallet-election-provider-support-benchmarking = { version = "4.0.0-dev", default-features = false, path = "../../../frame/election-provider-support/benchmarking", optional = true }
-pallet-elections-phragmen = { version = "5.0.0-dev", default-features = false, path = "../../../frame/elections-phragmen" }
+pallet-elections = { version = "5.0.0-dev", default-features = false, path = "../../../frame/elections" }
 pallet-fast-unstake = { version = "4.0.0-dev", default-features = false, path = "../../../frame/fast-unstake" }
 pallet-nis = { version = "4.0.0-dev", default-features = false, path = "../../../frame/nis" }
 pallet-grandpa = { version = "4.0.0-dev", default-features = false, path = "../../../frame/grandpa" }
@@ -124,7 +123,6 @@ with-tracing = ["frame-executive/with-tracing"]
 std = [
 	"pallet-whitelist/std",
 	"pallet-offences-benchmarking?/std",
-	"pallet-election-provider-support-benchmarking?/std",
 	"pallet-asset-tx-payment/std",
 	"frame-system-benchmarking?/std",
 	"frame-election-provider-support/std",
@@ -145,7 +143,7 @@ std = [
 	"pallet-contracts-primitives/std",
 	"pallet-conviction-voting/std",
 	"pallet-democracy/std",
-	"pallet-elections-phragmen/std",
+	"pallet-elections/std",
 	"pallet-fast-unstake/std",
 	"frame-executive/std",
 	"pallet-nis/std",
@@ -218,6 +216,7 @@ runtime-benchmarks = [
 	"frame-benchmarking-pallet-pov/runtime-benchmarks",
 	"frame-support/runtime-benchmarks",
 	"frame-system/runtime-benchmarks",
+	"frame-election-provider-support/runtime-benchmarks",
 	"sp-runtime/runtime-benchmarks",
 	"pallet-alliance/runtime-benchmarks",
 	"pallet-assets/runtime-benchmarks",
@@ -231,8 +230,7 @@ runtime-benchmarks = [
 	"pallet-conviction-voting/runtime-benchmarks",
 	"pallet-democracy/runtime-benchmarks",
 	"pallet-election-provider-multi-phase/runtime-benchmarks",
-	"pallet-election-provider-support-benchmarking/runtime-benchmarks",
-	"pallet-elections-phragmen/runtime-benchmarks",
+	"pallet-elections/runtime-benchmarks",
 	"pallet-fast-unstake/runtime-benchmarks",
 	"pallet-nis/runtime-benchmarks",
 	"pallet-grandpa/runtime-benchmarks",
@@ -289,7 +287,7 @@ try-runtime = [
 	"pallet-conviction-voting/try-runtime",
 	"pallet-democracy/try-runtime",
 	"pallet-election-provider-multi-phase/try-runtime",
-	"pallet-elections-phragmen/try-runtime",
+	"pallet-elections/try-runtime",
 	"pallet-fast-unstake/try-runtime",
 	"pallet-nis/try-runtime",
 	"pallet-grandpa/try-runtime",
diff --git a/substrate/bin/node/runtime/src/lib.rs b/substrate/bin/node/runtime/src/lib.rs
index e02792b9527..1ed43c211f8 100644
--- a/substrate/bin/node/runtime/src/lib.rs
+++ b/substrate/bin/node/runtime/src/lib.rs
@@ -24,7 +24,8 @@
 
 use codec::{Decode, Encode, MaxEncodedLen};
 use frame_election_provider_support::{
-	onchain, BalancingConfig, ElectionDataProvider, SequentialPhragmen, VoteWeight,
+	onchain, weights::SubstrateWeight, ApprovalVoting, BalancingConfig, ElectionDataProvider,
+	SequentialPhragmen, VoteWeight,
 };
 use frame_support::{
 	construct_runtime,
@@ -1010,18 +1011,21 @@ parameter_types! {
 	pub const TermDuration: BlockNumber = 7 * DAYS;
 	pub const DesiredMembers: u32 = 13;
 	pub const DesiredRunnersUp: u32 = 7;
-	pub const MaxVotesPerVoter: u32 = 16;
 	pub const MaxVoters: u32 = 512;
 	pub const MaxCandidates: u32 = 64;
-	pub const ElectionsPhragmenPalletId: LockIdentifier = *b"phrelect";
+	pub const MaxVotesPerVoter: u32 = 16;
+	// The ElectionsPalletId parameter name was changed along with the renaming of the elections
+	// pallet, but we keep the same lock ID to prevent a migration from current runtimes.
+	// Related to https://github.com/paritytech/substrate/issues/8250
+	pub const ElectionsPalletId: LockIdentifier = *b"phrelect";
 }
 
 // Make sure that there are no more than `MaxMembers` members elected via elections-phragmen.
 const_assert!(DesiredMembers::get() <= CouncilMaxMembers::get());
 
-impl pallet_elections_phragmen::Config for Runtime {
+impl pallet_elections::Config for Runtime {
 	type RuntimeEvent = RuntimeEvent;
-	type PalletId = ElectionsPhragmenPalletId;
+	type PalletId = ElectionsPalletId;
 	type Currency = Balances;
 	type ChangeMembers = Council;
 	// NOTE: this implies that council's genesis members cannot be set directly and must come from
@@ -1039,7 +1043,9 @@ impl pallet_elections_phragmen::Config for Runtime {
 	type MaxVoters = MaxVoters;
 	type MaxVotesPerVoter = MaxVotesPerVoter;
 	type MaxCandidates = MaxCandidates;
-	type WeightInfo = pallet_elections_phragmen::weights::SubstrateWeight<Runtime>;
+	type ElectionSolver = ApprovalVoting<Self::AccountId, Perbill>;
+	type SolverWeightInfo = SubstrateWeight<Runtime>;
+	type WeightInfo = pallet_elections::weights::SubstrateWeight<Runtime>;
 }
 
 parameter_types! {
@@ -1737,7 +1743,7 @@ construct_runtime!(
 		Democracy: pallet_democracy,
 		Council: pallet_collective::<Instance1>,
 		TechnicalCommittee: pallet_collective::<Instance2>,
-		Elections: pallet_elections_phragmen,
+		Elections: pallet_elections,
 		TechnicalMembership: pallet_membership::<Instance1>,
 		Grandpa: pallet_grandpa,
 		Treasury: pallet_treasury,
@@ -1851,6 +1857,7 @@ mod benches {
 	frame_benchmarking::define_benchmarks!(
 		[frame_benchmarking, BaselineBench::<Runtime>]
 		[frame_benchmarking_pallet_pov, Pov]
+		[frame_election_provider_support, EPSBench::<Runtime>]
 		[pallet_alliance, Alliance]
 		[pallet_assets, Assets]
 		[pallet_babe, Babe]
@@ -1863,8 +1870,7 @@ mod benches {
 		[pallet_contracts, Contracts]
 		[pallet_democracy, Democracy]
 		[pallet_election_provider_multi_phase, ElectionProviderMultiPhase]
-		[pallet_election_provider_support_benchmarking, EPSBench::<Runtime>]
-		[pallet_elections_phragmen, Elections]
+		[pallet_elections, Elections]
 		[pallet_fast_unstake, FastUnstake]
 		[pallet_nis, Nis]
 		[pallet_grandpa, Grandpa]
@@ -2279,7 +2285,7 @@ impl_runtime_apis! {
 			// which is why we need these two lines below.
 			use pallet_session_benchmarking::Pallet as SessionBench;
 			use pallet_offences_benchmarking::Pallet as OffencesBench;
-			use pallet_election_provider_support_benchmarking::Pallet as EPSBench;
+			use frame_election_provider_support::benchmarking::Pallet as EPSBench;
 			use frame_system_benchmarking::Pallet as SystemBench;
 			use baseline::Pallet as BaselineBench;
 			use pallet_nomination_pools_benchmarking::Pallet as NominationPoolsBench;
@@ -2302,14 +2308,14 @@ impl_runtime_apis! {
 			// which is why we need these two lines below.
 			use pallet_session_benchmarking::Pallet as SessionBench;
 			use pallet_offences_benchmarking::Pallet as OffencesBench;
-			use pallet_election_provider_support_benchmarking::Pallet as EPSBench;
+			use frame_election_provider_support::benchmarking::Pallet as EPSBench;
 			use frame_system_benchmarking::Pallet as SystemBench;
 			use baseline::Pallet as BaselineBench;
 			use pallet_nomination_pools_benchmarking::Pallet as NominationPoolsBench;
 
 			impl pallet_session_benchmarking::Config for Runtime {}
 			impl pallet_offences_benchmarking::Config for Runtime {}
-			impl pallet_election_provider_support_benchmarking::Config for Runtime {}
+			impl frame_election_provider_support::benchmarking::Config for Runtime {}
 			impl frame_system_benchmarking::Config for Runtime {}
 			impl baseline::Config for Runtime {}
 			impl pallet_nomination_pools_benchmarking::Config for Runtime {}
diff --git a/substrate/frame/election-provider-multi-phase/Cargo.toml b/substrate/frame/election-provider-multi-phase/Cargo.toml
index aa734850aae..996f40febde 100644
--- a/substrate/frame/election-provider-multi-phase/Cargo.toml
+++ b/substrate/frame/election-provider-multi-phase/Cargo.toml
@@ -33,7 +33,6 @@ frame-election-provider-support = { version = "4.0.0-dev", default-features = fa
 
 # Optional imports for benchmarking
 frame-benchmarking = { version = "4.0.0-dev", default-features = false, path = "../benchmarking", optional = true }
-pallet-election-provider-support-benchmarking = { version = "4.0.0-dev", default-features = false, path = "../election-provider-support/benchmarking", optional = true }
 rand = { version = "0.8.5", default-features = false, features = ["alloc", "small_rng"], optional = true }
 strum = { version = "0.24.1",  default-features = false, features = ["derive"], optional = true }
 
@@ -50,7 +49,6 @@ frame-benchmarking = { version = "4.0.0-dev", path = "../benchmarking" }
 [features]
 default = ["std"]
 std = [
-	"pallet-election-provider-support-benchmarking?/std",
 	"codec/std",
 	"scale-info/std",
 	"log/std",
diff --git a/substrate/frame/election-provider-support/Cargo.toml b/substrate/frame/election-provider-support/Cargo.toml
index 114caee793f..f9cb5233ced 100644
--- a/substrate/frame/election-provider-support/Cargo.toml
+++ b/substrate/frame/election-provider-support/Cargo.toml
@@ -23,6 +23,8 @@ sp-runtime = { version = "7.0.0", default-features = false, path = "../../primit
 sp-std = { version = "5.0.0", default-features = false, path = "../../primitives/std" }
 sp-core = { version = "7.0.0", default-features = false, path = "../../primitives/core" }
 
+frame-benchmarking = { version = "4.0.0-dev", default-features = false, path = "../benchmarking", optional = true }
+
 [dev-dependencies]
 rand = { version = "0.8.5", features = ["small_rng"] }
 sp-io = { version = "7.0.0", path = "../../primitives/io" }
@@ -41,6 +43,10 @@ std = [
 	"sp-core/std",
 	"sp-runtime/std",
 	"sp-std/std",
+
+	"frame-benchmarking?/std",
+]
+runtime-benchmarks = [
+	"frame-benchmarking/runtime-benchmarks",
 ]
-runtime-benchmarks = []
 try-runtime = []
diff --git a/substrate/frame/election-provider-support/benchmarking/Cargo.toml b/substrate/frame/election-provider-support/benchmarking/Cargo.toml
deleted file mode 100644
index bef371ec5ef..00000000000
--- a/substrate/frame/election-provider-support/benchmarking/Cargo.toml
+++ /dev/null
@@ -1,37 +0,0 @@
-[package]
-name = "pallet-election-provider-support-benchmarking"
-version = "4.0.0-dev"
-authors = ["Parity Technologies <admin@parity.io>"]
-edition = "2021"
-license = "Apache-2.0"
-homepage = "https://substrate.io"
-repository = "https://github.com/paritytech/substrate/"
-description = "Benchmarking for election provider support onchain config trait"
-
-[package.metadata.docs.rs]
-targets = ["x86_64-unknown-linux-gnu"]
-
-[dependencies]
-codec = { package = "parity-scale-codec", version = "3.2.2", default-features = false, features = [
-	"derive",
-] }
-frame-benchmarking = { version = "4.0.0-dev", default-features = false, optional = true, path = "../../benchmarking" }
-frame-election-provider-support = { version = "4.0.0-dev", default-features = false, path = ".." }
-frame-system = { version = "4.0.0-dev", default-features = false, path = "../../system" }
-sp-npos-elections = { version = "4.0.0-dev", default-features = false, path = "../../../primitives/npos-elections" }
-sp-runtime = { version = "7.0.0", default-features = false, path = "../../../primitives/runtime" }
-
-[features]
-default = ["std"]
-std = [
-	"codec/std",
-	"frame-benchmarking?/std",
-	"frame-election-provider-support/std",
-	"frame-system/std",
-	"sp-npos-elections/std",
-	"sp-runtime/std",
-]
-runtime-benchmarks = [
-	"frame-benchmarking/runtime-benchmarks",
-	"frame-election-provider-support/runtime-benchmarks",
-]
diff --git a/substrate/frame/election-provider-support/benchmarking/src/lib.rs b/substrate/frame/election-provider-support/src/benchmarking.rs
similarity index 86%
rename from substrate/frame/election-provider-support/benchmarking/src/lib.rs
rename to substrate/frame/election-provider-support/src/benchmarking.rs
index 774b7036fd4..5c5b952b6dc 100644
--- a/substrate/frame/election-provider-support/benchmarking/src/lib.rs
+++ b/substrate/frame/election-provider-support/src/benchmarking.rs
@@ -18,12 +18,9 @@
 //! Election provider support pallet benchmarking.
 //! This is separated into its own crate to avoid bloating the size of the runtime.
 
-#![cfg(feature = "runtime-benchmarks")]
-#![cfg_attr(not(feature = "std"), no_std)]
-
+use crate::{ApprovalVoting, NposSolver, PhragMMS, SequentialPhragmen};
 use codec::Decode;
 use frame_benchmarking::v1::{benchmarks, Vec};
-use frame_election_provider_support::{NposSolver, PhragMMS, SequentialPhragmen};
 
 pub struct Pallet<T: Config>(frame_system::Pallet<T>);
 pub trait Config: frame_system::Config {}
@@ -88,4 +85,17 @@ benchmarks! {
 				::solve(d as usize, targets, voters).is_ok()
 		);
 	}
+
+	approval_voting {
+		let v in (VOTERS[0]) .. VOTERS[1];
+		let t in (TARGETS[0]) .. TARGETS[1];
+		let d in (VOTES_PER_VOTER[0]) .. VOTES_PER_VOTER[1];
+
+		let (voters, targets) = set_up_voters_targets::<T::AccountId>(v, t, d as usize);
+	}: {
+		assert!(
+			ApprovalVoting::<T::AccountId, sp_runtime::Perbill>
+				::solve(d as usize, targets, voters).is_ok()
+		);
+	}
 }
diff --git a/substrate/frame/election-provider-support/src/lib.rs b/substrate/frame/election-provider-support/src/lib.rs
index 750ccca4621..423ce3d67e8 100644
--- a/substrate/frame/election-provider-support/src/lib.rs
+++ b/substrate/frame/election-provider-support/src/lib.rs
@@ -199,6 +199,9 @@ pub use sp_arithmetic;
 #[doc(hidden)]
 pub use sp_std;
 
+#[cfg(feature = "runtime-benchmarks")]
+pub mod benchmarking;
+
 pub mod weights;
 pub use weights::WeightInfo;
 
@@ -660,6 +663,29 @@ impl<AccountId: IdentifierT, Accuracy: PerThing128, Balancing: Get<Option<Balanc
 	}
 }
 
+/// A wrapper for [`sp_npos_elections::approval_voting()`] that implements [`NposSolver`]. See the
+/// documentation of [`sp_npos_elections::approval_voting()`] for more info.
+pub struct ApprovalVoting<AccountId, Accuracy>(sp_std::marker::PhantomData<(AccountId, Accuracy)>);
+
+impl<AccountId: IdentifierT, Accuracy: PerThing128> NposSolver
+	for ApprovalVoting<AccountId, Accuracy>
+{
+	type AccountId = AccountId;
+	type Accuracy = Accuracy;
+	type Error = sp_npos_elections::Error;
+	fn solve(
+		winners: usize,
+		targets: Vec<Self::AccountId>,
+		voters: Vec<(Self::AccountId, VoteWeight, impl IntoIterator<Item = Self::AccountId>)>,
+	) -> Result<ElectionResult<Self::AccountId, Self::Accuracy>, Self::Error> {
+		sp_npos_elections::approval_voting(winners, targets, voters)
+	}
+
+	fn weight<T: WeightInfo>(voters: u32, targets: u32, vote_degree: u32) -> Weight {
+		T::approval_voting(voters, targets, vote_degree)
+	}
+}
+
 /// A voter, at the level of abstraction of this crate.
 pub type Voter<AccountId, Bound> = (AccountId, VoteWeight, BoundedVec<AccountId, Bound>);
 
diff --git a/substrate/frame/election-provider-support/src/onchain.rs b/substrate/frame/election-provider-support/src/onchain.rs
index 296ac976d59..60c7853c794 100644
--- a/substrate/frame/election-provider-support/src/onchain.rs
+++ b/substrate/frame/election-provider-support/src/onchain.rs
@@ -185,7 +185,7 @@ impl<T: Config> ElectionProvider for OnChainExecution<T> {
 #[cfg(test)]
 mod tests {
 	use super::*;
-	use crate::{ElectionProvider, PhragMMS, SequentialPhragmen};
+	use crate::{ApprovalVoting, ElectionProvider, PhragMMS, SequentialPhragmen};
 	use frame_support::{assert_noop, parameter_types, traits::ConstU32};
 	use sp_npos_elections::Support;
 	use sp_runtime::Perbill;
@@ -235,6 +235,7 @@ mod tests {
 
 	struct PhragmenParams;
 	struct PhragMMSParams;
+	struct ApprovalVotingParams;
 
 	parameter_types! {
 		pub static MaxWinners: u32 = 10;
@@ -261,6 +262,16 @@ mod tests {
 		type TargetsBound = ConstU32<400>;
 	}
 
+	impl Config for ApprovalVotingParams {
+		type System = Runtime;
+		type Solver = ApprovalVoting<AccountId, Perbill>;
+		type DataProvider = mock_data_provider::DataProvider;
+		type WeightInfo = ();
+		type MaxWinners = MaxWinners;
+		type VotersBound = ConstU32<600>;
+		type TargetsBound = ConstU32<400>;
+	}
+
 	mod mock_data_provider {
 		use frame_support::{bounded_vec, traits::ConstU32};
 
@@ -333,4 +344,21 @@ mod tests {
 			);
 		})
 	}
+
+	#[test]
+	fn onchain_approval_voting_works() {
+		sp_io::TestExternalities::new_empty().execute_with(|| {
+			DesiredTargets::set(3);
+
+			// note that the `OnChainExecution::elect` implementation normalizes the vote weights.
+			assert_eq!(
+				<OnChainExecution::<ApprovalVotingParams> as ElectionProvider>::elect().unwrap(),
+				vec![
+					(10, Support { total: 20, voters: vec![(1, 5), (3, 15)] }),
+					(20, Support { total: 15, voters: vec![(1, 5), (2, 10)] }),
+					(30, Support { total: 25, voters: vec![(2, 10), (3, 15)] })
+				]
+			)
+		})
+	}
 }
diff --git a/substrate/frame/election-provider-support/src/weights.rs b/substrate/frame/election-provider-support/src/weights.rs
index fd4db1374ac..c28794267c6 100644
--- a/substrate/frame/election-provider-support/src/weights.rs
+++ b/substrate/frame/election-provider-support/src/weights.rs
@@ -1,13 +1,13 @@
 // This file is part of Substrate.
 
-// Copyright (C) Parity Technologies (UK) Ltd.
+// Copyright (C) 2023 Parity Technologies (UK) Ltd.
 // SPDX-License-Identifier: Apache-2.0
 
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
 //
-// http://www.apache.org/licenses/LICENSE-2.0
+// 	http://www.apache.org/licenses/LICENSE-2.0
 //
 // Unless required by applicable law or agreed to in writing, software
 // distributed under the License is distributed on an "AS IS" BASIS,
@@ -15,25 +15,29 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-//! Autogenerated weights for pallet_election_provider_support_benchmarking
+//! Autogenerated weights for frame_election_provider_support
 //!
 //! THIS FILE WAS AUTO-GENERATED USING THE SUBSTRATE BENCHMARK CLI VERSION 4.0.0-dev
-//! DATE: 2022-04-23, STEPS: `1`, REPEAT: 1, LOW RANGE: `[]`, HIGH RANGE: `[]`
+//! DATE: 2023-02-22, STEPS: `50`, REPEAT: `20`, LOW RANGE: `[]`, HIGH RANGE: `[]`
+//! WORST CASE MAP SIZE: `1000000`
+//! HOSTNAME: `runner-ehxwxxsd-project-145-concurrent-0`, CPU: `Intel(R) Xeon(R) CPU @ 2.60GHz`
 //! EXECUTION: Some(Wasm), WASM-EXECUTION: Compiled, CHAIN: Some("dev"), DB CACHE: 1024
 
 // Executed Command:
-// target/release/substrate
+// target/production/substrate
 // benchmark
 // pallet
-// --chain=dev
-// --steps=1
-// --repeat=1
-// --pallet=pallet_election_provider_support_benchmarking
+// --steps=50
+// --repeat=20
 // --extrinsic=*
 // --execution=wasm
 // --wasm-execution=compiled
 // --heap-pages=4096
-// --output=frame/election-provider-support/src/weights.rs
+// --json-file=/builds/parity/mirrors/substrate/.git/.artifacts/bench.json
+// --pallet=frame_election_provider_support
+// --chain=dev
+// --header=./HEADER-APACHE2
+// --output=./frame/election-provider-support/src/weights.rs
 // --template=./.maintain/frame-weight-template.hbs
 
 #![cfg_attr(rustfmt, rustfmt_skip)]
@@ -43,53 +47,108 @@
 use frame_support::{traits::Get, weights::{Weight, constants::RocksDbWeight}};
 use sp_std::marker::PhantomData;
 
-/// Weight functions needed for pallet_election_provider_support_benchmarking.
+/// Weight functions needed for frame_election_provider_support.
 pub trait WeightInfo {
 	fn phragmen(v: u32, t: u32, d: u32, ) -> Weight;
 	fn phragmms(v: u32, t: u32, d: u32, ) -> Weight;
+	fn approval_voting(v: u32, t: u32, d: u32, ) -> Weight;
 }
 
-/// Weights for pallet_election_provider_support_benchmarking using the Substrate node and recommended hardware.
+/// Weights for frame_election_provider_support using the Substrate node and recommended hardware.
 pub struct SubstrateWeight<T>(PhantomData<T>);
 impl<T: frame_system::Config> WeightInfo for SubstrateWeight<T> {
-	fn phragmen(v: u32, t: u32, d: u32, ) -> Weight {
-		Weight::from_ref_time(0 as u64)
-			// Standard Error: 667_000
-			.saturating_add(Weight::from_ref_time(32_973_000 as u64).saturating_mul(v as u64))
-			// Standard Error: 1_334_000
-			.saturating_add(Weight::from_ref_time(1_334_000 as u64).saturating_mul(t as u64))
-			// Standard Error: 60_644_000
-			.saturating_add(Weight::from_ref_time(2_636_364_000 as u64).saturating_mul(d as u64))
+	/// The range of component `v` is `[1000, 2000]`.
+	/// The range of component `t` is `[500, 1000]`.
+	/// The range of component `d` is `[5, 16]`.
+	fn phragmen(v: u32, _t: u32, d: u32, ) -> Weight {
+		// Proof Size summary in bytes:
+		//  Measured:  `0`
+		//  Estimated: `0`
+		// Minimum execution time: 5_789_174 nanoseconds.
+		Weight::from_ref_time(5_826_449_000)
+			.saturating_add(Weight::from_proof_size(0))
+			// Standard Error: 130_342
+			.saturating_add(Weight::from_ref_time(5_332_741).saturating_mul(v.into()))
+			// Standard Error: 13_325_769
+			.saturating_add(Weight::from_ref_time(1_416_874_101).saturating_mul(d.into()))
 	}
-	fn phragmms(v: u32, t: u32, d: u32, ) -> Weight {
-		Weight::from_ref_time(0 as u64)
-			// Standard Error: 73_000
-			.saturating_add(Weight::from_ref_time(21_073_000 as u64).saturating_mul(v as u64))
-			// Standard Error: 146_000
-			.saturating_add(Weight::from_ref_time(65_000 as u64).saturating_mul(t as u64))
-			// Standard Error: 6_649_000
-			.saturating_add(Weight::from_ref_time(1_711_424_000 as u64).saturating_mul(d as u64))
+	/// The range of component `v` is `[1000, 2000]`.
+	/// The range of component `t` is `[500, 1000]`.
+	/// The range of component `d` is `[5, 16]`.
+	fn phragmms(v: u32, _t: u32, d: u32, ) -> Weight {
+		// Proof Size summary in bytes:
+		//  Measured:  `0`
+		//  Estimated: `0`
+		// Minimum execution time: 4_151_790 nanoseconds.
+		Weight::from_ref_time(4_215_936_000)
+			.saturating_add(Weight::from_proof_size(0))
+			// Standard Error: 125_135
+			.saturating_add(Weight::from_ref_time(4_730_609).saturating_mul(v.into()))
+			// Standard Error: 12_793_390
+			.saturating_add(Weight::from_ref_time(1_474_383_961).saturating_mul(d.into()))
+	}
+	/// The range of component `v` is `[1000, 2000]`.
+	/// The range of component `t` is `[500, 1000]`.
+	/// The range of component `d` is `[5, 16]`.
+	fn approval_voting(v: u32, _t: u32, d: u32, ) -> Weight {
+		// Proof Size summary in bytes:
+		//  Measured:  `0`
+		//  Estimated: `0`
+		// Minimum execution time: 1_800_445 nanoseconds.
+		Weight::from_ref_time(1_824_645_000)
+			.saturating_add(Weight::from_proof_size(0))
+			// Standard Error: 26_266
+			.saturating_add(Weight::from_ref_time(1_229_576).saturating_mul(v.into()))
+			// Standard Error: 2_685_343
+			.saturating_add(Weight::from_ref_time(213_080_804).saturating_mul(d.into()))
 	}
 }
 
 // For backwards compatibility and tests
 impl WeightInfo for () {
-	fn phragmen(v: u32, t: u32, d: u32, ) -> Weight {
-		Weight::from_ref_time(0 as u64)
-			// Standard Error: 667_000
-			.saturating_add(Weight::from_ref_time(32_973_000 as u64).saturating_mul(v as u64))
-			// Standard Error: 1_334_000
-			.saturating_add(Weight::from_ref_time(1_334_000 as u64).saturating_mul(t as u64))
-			// Standard Error: 60_644_000
-			.saturating_add(Weight::from_ref_time(2_636_364_000 as u64).saturating_mul(d as u64))
+	/// The range of component `v` is `[1000, 2000]`.
+	/// The range of component `t` is `[500, 1000]`.
+	/// The range of component `d` is `[5, 16]`.
+	fn phragmen(v: u32, _t: u32, d: u32, ) -> Weight {
+		// Proof Size summary in bytes:
+		//  Measured:  `0`
+		//  Estimated: `0`
+		// Minimum execution time: 5_789_174 nanoseconds.
+		Weight::from_ref_time(5_826_449_000)
+			.saturating_add(Weight::from_proof_size(0))
+			// Standard Error: 130_342
+			.saturating_add(Weight::from_ref_time(5_332_741).saturating_mul(v.into()))
+			// Standard Error: 13_325_769
+			.saturating_add(Weight::from_ref_time(1_416_874_101).saturating_mul(d.into()))
+	}
+	/// The range of component `v` is `[1000, 2000]`.
+	/// The range of component `t` is `[500, 1000]`.
+	/// The range of component `d` is `[5, 16]`.
+	fn phragmms(v: u32, _t: u32, d: u32, ) -> Weight {
+		// Proof Size summary in bytes:
+		//  Measured:  `0`
+		//  Estimated: `0`
+		// Minimum execution time: 4_151_790 nanoseconds.
+		Weight::from_ref_time(4_215_936_000)
+			.saturating_add(Weight::from_proof_size(0))
+			// Standard Error: 125_135
+			.saturating_add(Weight::from_ref_time(4_730_609).saturating_mul(v.into()))
+			// Standard Error: 12_793_390
+			.saturating_add(Weight::from_ref_time(1_474_383_961).saturating_mul(d.into()))
 	}
-	fn phragmms(v: u32, t: u32, d: u32, ) -> Weight {
-		Weight::from_ref_time(0 as u64)
-			// Standard Error: 73_000
-			.saturating_add(Weight::from_ref_time(21_073_000 as u64).saturating_mul(v as u64))
-			// Standard Error: 146_000
-			.saturating_add(Weight::from_ref_time(65_000 as u64).saturating_mul(t as u64))
-			// Standard Error: 6_649_000
-			.saturating_add(Weight::from_ref_time(1_711_424_000 as u64).saturating_mul(d as u64))
+	/// The range of component `v` is `[1000, 2000]`.
+	/// The range of component `t` is `[500, 1000]`.
+	/// The range of component `d` is `[5, 16]`.
+	fn approval_voting(v: u32, _t: u32, d: u32, ) -> Weight {
+		// Proof Size summary in bytes:
+		//  Measured:  `0`
+		//  Estimated: `0`
+		// Minimum execution time: 1_800_445 nanoseconds.
+		Weight::from_ref_time(1_824_645_000)
+			.saturating_add(Weight::from_proof_size(0))
+			// Standard Error: 26_266
+			.saturating_add(Weight::from_ref_time(1_229_576).saturating_mul(v.into()))
+			// Standard Error: 2_685_343
+			.saturating_add(Weight::from_ref_time(213_080_804).saturating_mul(d.into()))
 	}
 }
diff --git a/substrate/frame/elections-phragmen/src/weights.rs b/substrate/frame/elections-phragmen/src/weights.rs
deleted file mode 100644
index 24ab3bc15fb..00000000000
--- a/substrate/frame/elections-phragmen/src/weights.rs
+++ /dev/null
@@ -1,559 +0,0 @@
-// This file is part of Substrate.
-
-// Copyright (C) Parity Technologies (UK) Ltd.
-// SPDX-License-Identifier: Apache-2.0
-
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-// 	http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-//! Autogenerated weights for pallet_elections_phragmen
-//!
-//! THIS FILE WAS AUTO-GENERATED USING THE SUBSTRATE BENCHMARK CLI VERSION 4.0.0-dev
-//! DATE: 2023-02-03, STEPS: `50`, REPEAT: `20`, LOW RANGE: `[]`, HIGH RANGE: `[]`
-//! WORST CASE MAP SIZE: `1000000`
-//! HOSTNAME: `runner-b3zmxxc-project-145-concurrent-0`, CPU: `Intel(R) Xeon(R) CPU @ 2.60GHz`
-//! EXECUTION: Some(Wasm), WASM-EXECUTION: Compiled, CHAIN: Some("dev"), DB CACHE: 1024
-
-// Executed Command:
-// target/production/substrate
-// benchmark
-// pallet
-// --steps=50
-// --repeat=20
-// --extrinsic=*
-// --execution=wasm
-// --wasm-execution=compiled
-// --heap-pages=4096
-// --json-file=/builds/parity/mirrors/substrate/.git/.artifacts/bench.json
-// --pallet=pallet_elections_phragmen
-// --chain=dev
-// --header=./HEADER-APACHE2
-// --output=./frame/elections-phragmen/src/weights.rs
-// --template=./.maintain/frame-weight-template.hbs
-
-#![cfg_attr(rustfmt, rustfmt_skip)]
-#![allow(unused_parens)]
-#![allow(unused_imports)]
-
-use frame_support::{traits::Get, weights::{Weight, constants::RocksDbWeight}};
-use sp_std::marker::PhantomData;
-
-/// Weight functions needed for pallet_elections_phragmen.
-pub trait WeightInfo {
-	fn vote_equal(v: u32, ) -> Weight;
-	fn vote_more(v: u32, ) -> Weight;
-	fn vote_less(v: u32, ) -> Weight;
-	fn remove_voter() -> Weight;
-	fn submit_candidacy(c: u32, ) -> Weight;
-	fn renounce_candidacy_candidate(c: u32, ) -> Weight;
-	fn renounce_candidacy_members() -> Weight;
-	fn renounce_candidacy_runners_up() -> Weight;
-	fn remove_member_without_replacement() -> Weight;
-	fn remove_member_with_replacement() -> Weight;
-	fn clean_defunct_voters(v: u32, d: u32, ) -> Weight;
-	fn election_phragmen(c: u32, v: u32, e: u32, ) -> Weight;
-}
-
-/// Weights for pallet_elections_phragmen using the Substrate node and recommended hardware.
-pub struct SubstrateWeight<T>(PhantomData<T>);
-impl<T: frame_system::Config> WeightInfo for SubstrateWeight<T> {
-	/// Storage: Elections Candidates (r:1 w:0)
-	/// Proof Skipped: Elections Candidates (max_values: Some(1), max_size: None, mode: Measured)
-	/// Storage: Elections Members (r:1 w:0)
-	/// Proof Skipped: Elections Members (max_values: Some(1), max_size: None, mode: Measured)
-	/// Storage: Elections RunnersUp (r:1 w:0)
-	/// Proof Skipped: Elections RunnersUp (max_values: Some(1), max_size: None, mode: Measured)
-	/// Storage: Elections Voting (r:1 w:1)
-	/// Proof Skipped: Elections Voting (max_values: None, max_size: None, mode: Measured)
-	/// Storage: Balances Locks (r:1 w:1)
-	/// Proof: Balances Locks (max_values: None, max_size: Some(1299), added: 3774, mode: MaxEncodedLen)
-	/// The range of component `v` is `[1, 16]`.
-	fn vote_equal(v: u32, ) -> Weight {
-		// Proof Size summary in bytes:
-		//  Measured:  `499 + v * (80 ±0)`
-		//  Estimated: `9726 + v * (320 ±0)`
-		// Minimum execution time: 27_362 nanoseconds.
-		Weight::from_parts(28_497_963, 9726)
-			// Standard Error: 3_968
-			.saturating_add(Weight::from_ref_time(176_840).saturating_mul(v.into()))
-			.saturating_add(T::DbWeight::get().reads(5_u64))
-			.saturating_add(T::DbWeight::get().writes(2_u64))
-			.saturating_add(Weight::from_proof_size(320).saturating_mul(v.into()))
-	}
-	/// Storage: Elections Candidates (r:1 w:0)
-	/// Proof Skipped: Elections Candidates (max_values: Some(1), max_size: None, mode: Measured)
-	/// Storage: Elections Members (r:1 w:0)
-	/// Proof Skipped: Elections Members (max_values: Some(1), max_size: None, mode: Measured)
-	/// Storage: Elections RunnersUp (r:1 w:0)
-	/// Proof Skipped: Elections RunnersUp (max_values: Some(1), max_size: None, mode: Measured)
-	/// Storage: Elections Voting (r:1 w:1)
-	/// Proof Skipped: Elections Voting (max_values: None, max_size: None, mode: Measured)
-	/// Storage: Balances Locks (r:1 w:1)
-	/// Proof: Balances Locks (max_values: None, max_size: Some(1299), added: 3774, mode: MaxEncodedLen)
-	/// The range of component `v` is `[2, 16]`.
-	fn vote_more(v: u32, ) -> Weight {
-		// Proof Size summary in bytes:
-		//  Measured:  `467 + v * (80 ±0)`
-		//  Estimated: `9598 + v * (320 ±0)`
-		// Minimum execution time: 37_120 nanoseconds.
-		Weight::from_parts(38_455_302, 9598)
-			// Standard Error: 5_478
-			.saturating_add(Weight::from_ref_time(219_678).saturating_mul(v.into()))
-			.saturating_add(T::DbWeight::get().reads(5_u64))
-			.saturating_add(T::DbWeight::get().writes(2_u64))
-			.saturating_add(Weight::from_proof_size(320).saturating_mul(v.into()))
-	}
-	/// Storage: Elections Candidates (r:1 w:0)
-	/// Proof Skipped: Elections Candidates (max_values: Some(1), max_size: None, mode: Measured)
-	/// Storage: Elections Members (r:1 w:0)
-	/// Proof Skipped: Elections Members (max_values: Some(1), max_size: None, mode: Measured)
-	/// Storage: Elections RunnersUp (r:1 w:0)
-	/// Proof Skipped: Elections RunnersUp (max_values: Some(1), max_size: None, mode: Measured)
-	/// Storage: Elections Voting (r:1 w:1)
-	/// Proof Skipped: Elections Voting (max_values: None, max_size: None, mode: Measured)
-	/// Storage: Balances Locks (r:1 w:1)
-	/// Proof: Balances Locks (max_values: None, max_size: Some(1299), added: 3774, mode: MaxEncodedLen)
-	/// The range of component `v` is `[2, 16]`.
-	fn vote_less(v: u32, ) -> Weight {
-		// Proof Size summary in bytes:
-		//  Measured:  `499 + v * (80 ±0)`
-		//  Estimated: `9726 + v * (320 ±0)`
-		// Minimum execution time: 36_928 nanoseconds.
-		Weight::from_parts(38_334_669, 9726)
-			// Standard Error: 5_271
-			.saturating_add(Weight::from_ref_time(232_355).saturating_mul(v.into()))
-			.saturating_add(T::DbWeight::get().reads(5_u64))
-			.saturating_add(T::DbWeight::get().writes(2_u64))
-			.saturating_add(Weight::from_proof_size(320).saturating_mul(v.into()))
-	}
-	/// Storage: Elections Voting (r:1 w:1)
-	/// Proof Skipped: Elections Voting (max_values: None, max_size: None, mode: Measured)
-	/// Storage: Balances Locks (r:1 w:1)
-	/// Proof: Balances Locks (max_values: None, max_size: Some(1299), added: 3774, mode: MaxEncodedLen)
-	fn remove_voter() -> Weight {
-		// Proof Size summary in bytes:
-		//  Measured:  `989`
-		//  Estimated: `7238`
-		// Minimum execution time: 34_338 nanoseconds.
-		Weight::from_parts(35_672_000, 7238)
-			.saturating_add(T::DbWeight::get().reads(2_u64))
-			.saturating_add(T::DbWeight::get().writes(2_u64))
-	}
-	/// Storage: Elections Candidates (r:1 w:1)
-	/// Proof Skipped: Elections Candidates (max_values: Some(1), max_size: None, mode: Measured)
-	/// Storage: Elections Members (r:1 w:0)
-	/// Proof Skipped: Elections Members (max_values: Some(1), max_size: None, mode: Measured)
-	/// Storage: Elections RunnersUp (r:1 w:0)
-	/// Proof Skipped: Elections RunnersUp (max_values: Some(1), max_size: None, mode: Measured)
-	/// The range of component `c` is `[1, 64]`.
-	fn submit_candidacy(c: u32, ) -> Weight {
-		// Proof Size summary in bytes:
-		//  Measured:  `1697 + c * (48 ±0)`
-		//  Estimated: `6576 + c * (144 ±0)`
-		// Minimum execution time: 31_864 nanoseconds.
-		Weight::from_parts(33_490_161, 6576)
-			// Standard Error: 2_643
-			.saturating_add(Weight::from_ref_time(158_386).saturating_mul(c.into()))
-			.saturating_add(T::DbWeight::get().reads(3_u64))
-			.saturating_add(T::DbWeight::get().writes(1_u64))
-			.saturating_add(Weight::from_proof_size(144).saturating_mul(c.into()))
-	}
-	/// Storage: Elections Candidates (r:1 w:1)
-	/// Proof Skipped: Elections Candidates (max_values: Some(1), max_size: None, mode: Measured)
-	/// The range of component `c` is `[1, 64]`.
-	fn renounce_candidacy_candidate(c: u32, ) -> Weight {
-		// Proof Size summary in bytes:
-		//  Measured:  `349 + c * (48 ±0)`
-		//  Estimated: `844 + c * (48 ±0)`
-		// Minimum execution time: 27_292 nanoseconds.
-		Weight::from_parts(28_364_955, 844)
-			// Standard Error: 1_335
-			.saturating_add(Weight::from_ref_time(78_086).saturating_mul(c.into()))
-			.saturating_add(T::DbWeight::get().reads(1_u64))
-			.saturating_add(T::DbWeight::get().writes(1_u64))
-			.saturating_add(Weight::from_proof_size(48).saturating_mul(c.into()))
-	}
-	/// Storage: Elections Members (r:1 w:1)
-	/// Proof Skipped: Elections Members (max_values: Some(1), max_size: None, mode: Measured)
-	/// Storage: Elections RunnersUp (r:1 w:1)
-	/// Proof Skipped: Elections RunnersUp (max_values: Some(1), max_size: None, mode: Measured)
-	/// Storage: Council Prime (r:1 w:1)
-	/// Proof Skipped: Council Prime (max_values: Some(1), max_size: None, mode: Measured)
-	/// Storage: Council Proposals (r:1 w:0)
-	/// Proof Skipped: Council Proposals (max_values: Some(1), max_size: None, mode: Measured)
-	/// Storage: Council Members (r:0 w:1)
-	/// Proof Skipped: Council Members (max_values: Some(1), max_size: None, mode: Measured)
-	fn renounce_candidacy_members() -> Weight {
-		// Proof Size summary in bytes:
-		//  Measured:  `2027`
-		//  Estimated: `12115`
-		// Minimum execution time: 45_975 nanoseconds.
-		Weight::from_parts(47_103_000, 12115)
-			.saturating_add(T::DbWeight::get().reads(4_u64))
-			.saturating_add(T::DbWeight::get().writes(4_u64))
-	}
-	/// Storage: Elections RunnersUp (r:1 w:1)
-	/// Proof Skipped: Elections RunnersUp (max_values: Some(1), max_size: None, mode: Measured)
-	fn renounce_candidacy_runners_up() -> Weight {
-		// Proof Size summary in bytes:
-		//  Measured:  `975`
-		//  Estimated: `1470`
-		// Minimum execution time: 29_243 nanoseconds.
-		Weight::from_parts(30_582_000, 1470)
-			.saturating_add(T::DbWeight::get().reads(1_u64))
-			.saturating_add(T::DbWeight::get().writes(1_u64))
-	}
-	/// Storage: Benchmark Override (r:0 w:0)
-	/// Proof Skipped: Benchmark Override (max_values: None, max_size: None, mode: Measured)
-	fn remove_member_without_replacement() -> Weight {
-		// Proof Size summary in bytes:
-		//  Measured:  `0`
-		//  Estimated: `0`
-		// Minimum execution time: 2_000_000_000 nanoseconds.
-		Weight::from_ref_time(2_000_000_000_000)
-	}
-	/// Storage: Elections Members (r:1 w:1)
-	/// Proof Skipped: Elections Members (max_values: Some(1), max_size: None, mode: Measured)
-	/// Storage: System Account (r:1 w:1)
-	/// Proof: System Account (max_values: None, max_size: Some(128), added: 2603, mode: MaxEncodedLen)
-	/// Storage: Elections RunnersUp (r:1 w:1)
-	/// Proof Skipped: Elections RunnersUp (max_values: Some(1), max_size: None, mode: Measured)
-	/// Storage: Council Prime (r:1 w:1)
-	/// Proof Skipped: Council Prime (max_values: Some(1), max_size: None, mode: Measured)
-	/// Storage: Council Proposals (r:1 w:0)
-	/// Proof Skipped: Council Proposals (max_values: Some(1), max_size: None, mode: Measured)
-	/// Storage: Council Members (r:0 w:1)
-	/// Proof Skipped: Council Members (max_values: Some(1), max_size: None, mode: Measured)
-	fn remove_member_with_replacement() -> Weight {
-		// Proof Size summary in bytes:
-		//  Measured:  `2027`
-		//  Estimated: `14718`
-		// Minimum execution time: 52_527 nanoseconds.
-		Weight::from_parts(53_538_000, 14718)
-			.saturating_add(T::DbWeight::get().reads(5_u64))
-			.saturating_add(T::DbWeight::get().writes(5_u64))
-	}
-	/// Storage: Elections Voting (r:513 w:512)
-	/// Proof Skipped: Elections Voting (max_values: None, max_size: None, mode: Measured)
-	/// Storage: Elections Members (r:1 w:0)
-	/// Proof Skipped: Elections Members (max_values: Some(1), max_size: None, mode: Measured)
-	/// Storage: Elections RunnersUp (r:1 w:0)
-	/// Proof Skipped: Elections RunnersUp (max_values: Some(1), max_size: None, mode: Measured)
-	/// Storage: Elections Candidates (r:1 w:0)
-	/// Proof Skipped: Elections Candidates (max_values: Some(1), max_size: None, mode: Measured)
-	/// Storage: Balances Locks (r:512 w:512)
-	/// Proof: Balances Locks (max_values: None, max_size: Some(1299), added: 3774, mode: MaxEncodedLen)
-	/// Storage: System Account (r:512 w:512)
-	/// Proof: System Account (max_values: None, max_size: Some(128), added: 2603, mode: MaxEncodedLen)
-	/// The range of component `v` is `[256, 512]`.
-	/// The range of component `d` is `[0, 256]`.
-	fn clean_defunct_voters(v: u32, _d: u32, ) -> Weight {
-		// Proof Size summary in bytes:
-		//  Measured:  `1115 + v * (875 ±0)`
-		//  Estimated: `8448 + v * (12352 ±0)`
-		// Minimum execution time: 14_934_185 nanoseconds.
-		Weight::from_parts(15_014_057_000, 8448)
-			// Standard Error: 245_588
-			.saturating_add(Weight::from_ref_time(35_586_946).saturating_mul(v.into()))
-			.saturating_add(T::DbWeight::get().reads(4_u64))
-			.saturating_add(T::DbWeight::get().reads((3_u64).saturating_mul(v.into())))
-			.saturating_add(T::DbWeight::get().writes((3_u64).saturating_mul(v.into())))
-			.saturating_add(Weight::from_proof_size(12352).saturating_mul(v.into()))
-	}
-	/// Storage: Elections Candidates (r:1 w:1)
-	/// Proof Skipped: Elections Candidates (max_values: Some(1), max_size: None, mode: Measured)
-	/// Storage: Elections Members (r:1 w:1)
-	/// Proof Skipped: Elections Members (max_values: Some(1), max_size: None, mode: Measured)
-	/// Storage: Elections RunnersUp (r:1 w:1)
-	/// Proof Skipped: Elections RunnersUp (max_values: Some(1), max_size: None, mode: Measured)
-	/// Storage: Elections Voting (r:513 w:0)
-	/// Proof Skipped: Elections Voting (max_values: None, max_size: None, mode: Measured)
-	/// Storage: Council Proposals (r:1 w:0)
-	/// Proof Skipped: Council Proposals (max_values: Some(1), max_size: None, mode: Measured)
-	/// Storage: System Account (r:44 w:44)
-	/// Proof: System Account (max_values: None, max_size: Some(128), added: 2603, mode: MaxEncodedLen)
-	/// Storage: Elections ElectionRounds (r:1 w:1)
-	/// Proof Skipped: Elections ElectionRounds (max_values: Some(1), max_size: None, mode: Measured)
-	/// Storage: Council Members (r:0 w:1)
-	/// Proof Skipped: Council Members (max_values: Some(1), max_size: None, mode: Measured)
-	/// Storage: Council Prime (r:0 w:1)
-	/// Proof Skipped: Council Prime (max_values: Some(1), max_size: None, mode: Measured)
-	/// The range of component `c` is `[1, 64]`.
-	/// The range of component `v` is `[1, 512]`.
-	/// The range of component `e` is `[512, 8192]`.
-	fn election_phragmen(c: u32, v: u32, e: u32, ) -> Weight {
-		// Proof Size summary in bytes:
-		//  Measured:  `0 + v * (638 ±0) + e * (28 ±0)`
-		//  Estimated: `330033 + v * (5229 ±6) + e * (89 ±0) + c * (2135 ±7)`
-		// Minimum execution time: 1_273_671 nanoseconds.
-		Weight::from_parts(1_279_716_000, 330033)
-			// Standard Error: 543_277
-			.saturating_add(Weight::from_ref_time(20_613_753).saturating_mul(v.into()))
-			// Standard Error: 34_857
-			.saturating_add(Weight::from_ref_time(688_354).saturating_mul(e.into()))
-			.saturating_add(T::DbWeight::get().reads(21_u64))
-			.saturating_add(T::DbWeight::get().reads((1_u64).saturating_mul(c.into())))
-			.saturating_add(T::DbWeight::get().reads((1_u64).saturating_mul(v.into())))
-			.saturating_add(T::DbWeight::get().writes(6_u64))
-			.saturating_add(T::DbWeight::get().writes((1_u64).saturating_mul(c.into())))
-			.saturating_add(Weight::from_proof_size(5229).saturating_mul(v.into()))
-			.saturating_add(Weight::from_proof_size(89).saturating_mul(e.into()))
-			.saturating_add(Weight::from_proof_size(2135).saturating_mul(c.into()))
-	}
-}
-
-// For backwards compatibility and tests
-impl WeightInfo for () {
-	/// Storage: Elections Candidates (r:1 w:0)
-	/// Proof Skipped: Elections Candidates (max_values: Some(1), max_size: None, mode: Measured)
-	/// Storage: Elections Members (r:1 w:0)
-	/// Proof Skipped: Elections Members (max_values: Some(1), max_size: None, mode: Measured)
-	/// Storage: Elections RunnersUp (r:1 w:0)
-	/// Proof Skipped: Elections RunnersUp (max_values: Some(1), max_size: None, mode: Measured)
-	/// Storage: Elections Voting (r:1 w:1)
-	/// Proof Skipped: Elections Voting (max_values: None, max_size: None, mode: Measured)
-	/// Storage: Balances Locks (r:1 w:1)
-	/// Proof: Balances Locks (max_values: None, max_size: Some(1299), added: 3774, mode: MaxEncodedLen)
-	/// The range of component `v` is `[1, 16]`.
-	fn vote_equal(v: u32, ) -> Weight {
-		// Proof Size summary in bytes:
-		//  Measured:  `499 + v * (80 ±0)`
-		//  Estimated: `9726 + v * (320 ±0)`
-		// Minimum execution time: 27_362 nanoseconds.
-		Weight::from_parts(28_497_963, 9726)
-			// Standard Error: 3_968
-			.saturating_add(Weight::from_ref_time(176_840).saturating_mul(v.into()))
-			.saturating_add(RocksDbWeight::get().reads(5_u64))
-			.saturating_add(RocksDbWeight::get().writes(2_u64))
-			.saturating_add(Weight::from_proof_size(320).saturating_mul(v.into()))
-	}
-	/// Storage: Elections Candidates (r:1 w:0)
-	/// Proof Skipped: Elections Candidates (max_values: Some(1), max_size: None, mode: Measured)
-	/// Storage: Elections Members (r:1 w:0)
-	/// Proof Skipped: Elections Members (max_values: Some(1), max_size: None, mode: Measured)
-	/// Storage: Elections RunnersUp (r:1 w:0)
-	/// Proof Skipped: Elections RunnersUp (max_values: Some(1), max_size: None, mode: Measured)
-	/// Storage: Elections Voting (r:1 w:1)
-	/// Proof Skipped: Elections Voting (max_values: None, max_size: None, mode: Measured)
-	/// Storage: Balances Locks (r:1 w:1)
-	/// Proof: Balances Locks (max_values: None, max_size: Some(1299), added: 3774, mode: MaxEncodedLen)
-	/// The range of component `v` is `[2, 16]`.
-	fn vote_more(v: u32, ) -> Weight {
-		// Proof Size summary in bytes:
-		//  Measured:  `467 + v * (80 ±0)`
-		//  Estimated: `9598 + v * (320 ±0)`
-		// Minimum execution time: 37_120 nanoseconds.
-		Weight::from_parts(38_455_302, 9598)
-			// Standard Error: 5_478
-			.saturating_add(Weight::from_ref_time(219_678).saturating_mul(v.into()))
-			.saturating_add(RocksDbWeight::get().reads(5_u64))
-			.saturating_add(RocksDbWeight::get().writes(2_u64))
-			.saturating_add(Weight::from_proof_size(320).saturating_mul(v.into()))
-	}
-	/// Storage: Elections Candidates (r:1 w:0)
-	/// Proof Skipped: Elections Candidates (max_values: Some(1), max_size: None, mode: Measured)
-	/// Storage: Elections Members (r:1 w:0)
-	/// Proof Skipped: Elections Members (max_values: Some(1), max_size: None, mode: Measured)
-	/// Storage: Elections RunnersUp (r:1 w:0)
-	/// Proof Skipped: Elections RunnersUp (max_values: Some(1), max_size: None, mode: Measured)
-	/// Storage: Elections Voting (r:1 w:1)
-	/// Proof Skipped: Elections Voting (max_values: None, max_size: None, mode: Measured)
-	/// Storage: Balances Locks (r:1 w:1)
-	/// Proof: Balances Locks (max_values: None, max_size: Some(1299), added: 3774, mode: MaxEncodedLen)
-	/// The range of component `v` is `[2, 16]`.
-	fn vote_less(v: u32, ) -> Weight {
-		// Proof Size summary in bytes:
-		//  Measured:  `499 + v * (80 ±0)`
-		//  Estimated: `9726 + v * (320 ±0)`
-		// Minimum execution time: 36_928 nanoseconds.
-		Weight::from_parts(38_334_669, 9726)
-			// Standard Error: 5_271
-			.saturating_add(Weight::from_ref_time(232_355).saturating_mul(v.into()))
-			.saturating_add(RocksDbWeight::get().reads(5_u64))
-			.saturating_add(RocksDbWeight::get().writes(2_u64))
-			.saturating_add(Weight::from_proof_size(320).saturating_mul(v.into()))
-	}
-	/// Storage: Elections Voting (r:1 w:1)
-	/// Proof Skipped: Elections Voting (max_values: None, max_size: None, mode: Measured)
-	/// Storage: Balances Locks (r:1 w:1)
-	/// Proof: Balances Locks (max_values: None, max_size: Some(1299), added: 3774, mode: MaxEncodedLen)
-	fn remove_voter() -> Weight {
-		// Proof Size summary in bytes:
-		//  Measured:  `989`
-		//  Estimated: `7238`
-		// Minimum execution time: 34_338 nanoseconds.
-		Weight::from_parts(35_672_000, 7238)
-			.saturating_add(RocksDbWeight::get().reads(2_u64))
-			.saturating_add(RocksDbWeight::get().writes(2_u64))
-	}
-	/// Storage: Elections Candidates (r:1 w:1)
-	/// Proof Skipped: Elections Candidates (max_values: Some(1), max_size: None, mode: Measured)
-	/// Storage: Elections Members (r:1 w:0)
-	/// Proof Skipped: Elections Members (max_values: Some(1), max_size: None, mode: Measured)
-	/// Storage: Elections RunnersUp (r:1 w:0)
-	/// Proof Skipped: Elections RunnersUp (max_values: Some(1), max_size: None, mode: Measured)
-	/// The range of component `c` is `[1, 64]`.
-	fn submit_candidacy(c: u32, ) -> Weight {
-		// Proof Size summary in bytes:
-		//  Measured:  `1697 + c * (48 ±0)`
-		//  Estimated: `6576 + c * (144 ±0)`
-		// Minimum execution time: 31_864 nanoseconds.
-		Weight::from_parts(33_490_161, 6576)
-			// Standard Error: 2_643
-			.saturating_add(Weight::from_ref_time(158_386).saturating_mul(c.into()))
-			.saturating_add(RocksDbWeight::get().reads(3_u64))
-			.saturating_add(RocksDbWeight::get().writes(1_u64))
-			.saturating_add(Weight::from_proof_size(144).saturating_mul(c.into()))
-	}
-	/// Storage: Elections Candidates (r:1 w:1)
-	/// Proof Skipped: Elections Candidates (max_values: Some(1), max_size: None, mode: Measured)
-	/// The range of component `c` is `[1, 64]`.
-	fn renounce_candidacy_candidate(c: u32, ) -> Weight {
-		// Proof Size summary in bytes:
-		//  Measured:  `349 + c * (48 ±0)`
-		//  Estimated: `844 + c * (48 ±0)`
-		// Minimum execution time: 27_292 nanoseconds.
-		Weight::from_parts(28_364_955, 844)
-			// Standard Error: 1_335
-			.saturating_add(Weight::from_ref_time(78_086).saturating_mul(c.into()))
-			.saturating_add(RocksDbWeight::get().reads(1_u64))
-			.saturating_add(RocksDbWeight::get().writes(1_u64))
-			.saturating_add(Weight::from_proof_size(48).saturating_mul(c.into()))
-	}
-	/// Storage: Elections Members (r:1 w:1)
-	/// Proof Skipped: Elections Members (max_values: Some(1), max_size: None, mode: Measured)
-	/// Storage: Elections RunnersUp (r:1 w:1)
-	/// Proof Skipped: Elections RunnersUp (max_values: Some(1), max_size: None, mode: Measured)
-	/// Storage: Council Prime (r:1 w:1)
-	/// Proof Skipped: Council Prime (max_values: Some(1), max_size: None, mode: Measured)
-	/// Storage: Council Proposals (r:1 w:0)
-	/// Proof Skipped: Council Proposals (max_values: Some(1), max_size: None, mode: Measured)
-	/// Storage: Council Members (r:0 w:1)
-	/// Proof Skipped: Council Members (max_values: Some(1), max_size: None, mode: Measured)
-	fn renounce_candidacy_members() -> Weight {
-		// Proof Size summary in bytes:
-		//  Measured:  `2027`
-		//  Estimated: `12115`
-		// Minimum execution time: 45_975 nanoseconds.
-		Weight::from_parts(47_103_000, 12115)
-			.saturating_add(RocksDbWeight::get().reads(4_u64))
-			.saturating_add(RocksDbWeight::get().writes(4_u64))
-	}
-	/// Storage: Elections RunnersUp (r:1 w:1)
-	/// Proof Skipped: Elections RunnersUp (max_values: Some(1), max_size: None, mode: Measured)
-	fn renounce_candidacy_runners_up() -> Weight {
-		// Proof Size summary in bytes:
-		//  Measured:  `975`
-		//  Estimated: `1470`
-		// Minimum execution time: 29_243 nanoseconds.
-		Weight::from_parts(30_582_000, 1470)
-			.saturating_add(RocksDbWeight::get().reads(1_u64))
-			.saturating_add(RocksDbWeight::get().writes(1_u64))
-	}
-	/// Storage: Benchmark Override (r:0 w:0)
-	/// Proof Skipped: Benchmark Override (max_values: None, max_size: None, mode: Measured)
-	fn remove_member_without_replacement() -> Weight {
-		// Proof Size summary in bytes:
-		//  Measured:  `0`
-		//  Estimated: `0`
-		// Minimum execution time: 2_000_000_000 nanoseconds.
-		Weight::from_ref_time(2_000_000_000_000)
-	}
-	/// Storage: Elections Members (r:1 w:1)
-	/// Proof Skipped: Elections Members (max_values: Some(1), max_size: None, mode: Measured)
-	/// Storage: System Account (r:1 w:1)
-	/// Proof: System Account (max_values: None, max_size: Some(128), added: 2603, mode: MaxEncodedLen)
-	/// Storage: Elections RunnersUp (r:1 w:1)
-	/// Proof Skipped: Elections RunnersUp (max_values: Some(1), max_size: None, mode: Measured)
-	/// Storage: Council Prime (r:1 w:1)
-	/// Proof Skipped: Council Prime (max_values: Some(1), max_size: None, mode: Measured)
-	/// Storage: Council Proposals (r:1 w:0)
-	/// Proof Skipped: Council Proposals (max_values: Some(1), max_size: None, mode: Measured)
-	/// Storage: Council Members (r:0 w:1)
-	/// Proof Skipped: Council Members (max_values: Some(1), max_size: None, mode: Measured)
-	fn remove_member_with_replacement() -> Weight {
-		// Proof Size summary in bytes:
-		//  Measured:  `2027`
-		//  Estimated: `14718`
-		// Minimum execution time: 52_527 nanoseconds.
-		Weight::from_parts(53_538_000, 14718)
-			.saturating_add(RocksDbWeight::get().reads(5_u64))
-			.saturating_add(RocksDbWeight::get().writes(5_u64))
-	}
-	/// Storage: Elections Voting (r:513 w:512)
-	/// Proof Skipped: Elections Voting (max_values: None, max_size: None, mode: Measured)
-	/// Storage: Elections Members (r:1 w:0)
-	/// Proof Skipped: Elections Members (max_values: Some(1), max_size: None, mode: Measured)
-	/// Storage: Elections RunnersUp (r:1 w:0)
-	/// Proof Skipped: Elections RunnersUp (max_values: Some(1), max_size: None, mode: Measured)
-	/// Storage: Elections Candidates (r:1 w:0)
-	/// Proof Skipped: Elections Candidates (max_values: Some(1), max_size: None, mode: Measured)
-	/// Storage: Balances Locks (r:512 w:512)
-	/// Proof: Balances Locks (max_values: None, max_size: Some(1299), added: 3774, mode: MaxEncodedLen)
-	/// Storage: System Account (r:512 w:512)
-	/// Proof: System Account (max_values: None, max_size: Some(128), added: 2603, mode: MaxEncodedLen)
-	/// The range of component `v` is `[256, 512]`.
-	/// The range of component `d` is `[0, 256]`.
-	fn clean_defunct_voters(v: u32, _d: u32, ) -> Weight {
-		// Proof Size summary in bytes:
-		//  Measured:  `1115 + v * (875 ±0)`
-		//  Estimated: `8448 + v * (12352 ±0)`
-		// Minimum execution time: 14_934_185 nanoseconds.
-		Weight::from_parts(15_014_057_000, 8448)
-			// Standard Error: 245_588
-			.saturating_add(Weight::from_ref_time(35_586_946).saturating_mul(v.into()))
-			.saturating_add(RocksDbWeight::get().reads(4_u64))
-			.saturating_add(RocksDbWeight::get().reads((3_u64).saturating_mul(v.into())))
-			.saturating_add(RocksDbWeight::get().writes((3_u64).saturating_mul(v.into())))
-			.saturating_add(Weight::from_proof_size(12352).saturating_mul(v.into()))
-	}
-	/// Storage: Elections Candidates (r:1 w:1)
-	/// Proof Skipped: Elections Candidates (max_values: Some(1), max_size: None, mode: Measured)
-	/// Storage: Elections Members (r:1 w:1)
-	/// Proof Skipped: Elections Members (max_values: Some(1), max_size: None, mode: Measured)
-	/// Storage: Elections RunnersUp (r:1 w:1)
-	/// Proof Skipped: Elections RunnersUp (max_values: Some(1), max_size: None, mode: Measured)
-	/// Storage: Elections Voting (r:513 w:0)
-	/// Proof Skipped: Elections Voting (max_values: None, max_size: None, mode: Measured)
-	/// Storage: Council Proposals (r:1 w:0)
-	/// Proof Skipped: Council Proposals (max_values: Some(1), max_size: None, mode: Measured)
-	/// Storage: System Account (r:44 w:44)
-	/// Proof: System Account (max_values: None, max_size: Some(128), added: 2603, mode: MaxEncodedLen)
-	/// Storage: Elections ElectionRounds (r:1 w:1)
-	/// Proof Skipped: Elections ElectionRounds (max_values: Some(1), max_size: None, mode: Measured)
-	/// Storage: Council Members (r:0 w:1)
-	/// Proof Skipped: Council Members (max_values: Some(1), max_size: None, mode: Measured)
-	/// Storage: Council Prime (r:0 w:1)
-	/// Proof Skipped: Council Prime (max_values: Some(1), max_size: None, mode: Measured)
-	/// The range of component `c` is `[1, 64]`.
-	/// The range of component `v` is `[1, 512]`.
-	/// The range of component `e` is `[512, 8192]`.
-	fn election_phragmen(c: u32, v: u32, e: u32, ) -> Weight {
-		// Proof Size summary in bytes:
-		//  Measured:  `0 + v * (638 ±0) + e * (28 ±0)`
-		//  Estimated: `330033 + v * (5229 ±6) + e * (89 ±0) + c * (2135 ±7)`
-		// Minimum execution time: 1_273_671 nanoseconds.
-		Weight::from_parts(1_279_716_000, 330033)
-			// Standard Error: 543_277
-			.saturating_add(Weight::from_ref_time(20_613_753).saturating_mul(v.into()))
-			// Standard Error: 34_857
-			.saturating_add(Weight::from_ref_time(688_354).saturating_mul(e.into()))
-			.saturating_add(RocksDbWeight::get().reads(21_u64))
-			.saturating_add(RocksDbWeight::get().reads((1_u64).saturating_mul(c.into())))
-			.saturating_add(RocksDbWeight::get().reads((1_u64).saturating_mul(v.into())))
-			.saturating_add(RocksDbWeight::get().writes(6_u64))
-			.saturating_add(RocksDbWeight::get().writes((1_u64).saturating_mul(c.into())))
-			.saturating_add(Weight::from_proof_size(5229).saturating_mul(v.into()))
-			.saturating_add(Weight::from_proof_size(89).saturating_mul(e.into()))
-			.saturating_add(Weight::from_proof_size(2135).saturating_mul(c.into()))
-	}
-}
diff --git a/substrate/frame/elections-phragmen/CHANGELOG.md b/substrate/frame/elections/CHANGELOG.md
similarity index 80%
rename from substrate/frame/elections-phragmen/CHANGELOG.md
rename to substrate/frame/elections/CHANGELOG.md
index 231de1d2e47..b173557be6f 100644
--- a/substrate/frame/elections-phragmen/CHANGELOG.md
+++ b/substrate/frame/elections/CHANGELOG.md
@@ -4,6 +4,17 @@ All notable changes to this crate will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this crate adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [5.0.0] - UNRELEASED
+
+### Added
+
+### Changed
+Generalized the pallet to use `NposSolver` instead of hard coding the phragmen algorithm; Changed the name of the pallet from `pallet-elections-phragmen` to `pallet-elections`
+
+### Fixed
+
+### Security
+
 ## [4.0.0] - UNRELEASED
 
 ### Added
diff --git a/substrate/frame/elections-phragmen/Cargo.toml b/substrate/frame/elections/Cargo.toml
similarity index 90%
rename from substrate/frame/elections-phragmen/Cargo.toml
rename to substrate/frame/elections/Cargo.toml
index ce39e42b8ee..14d07eca7dd 100644
--- a/substrate/frame/elections-phragmen/Cargo.toml
+++ b/substrate/frame/elections/Cargo.toml
@@ -1,12 +1,12 @@
 [package]
-name = "pallet-elections-phragmen"
+name = "pallet-elections"
 version = "5.0.0-dev"
 authors = ["Parity Technologies <admin@parity.io>"]
 edition = "2021"
 license = "Apache-2.0"
 homepage = "https://substrate.io"
 repository = "https://github.com/paritytech/substrate/"
-description = "FRAME pallet based on seq-Phragmén election method."
+description = "FRAME pallet for generic elections."
 readme = "README.md"
 
 [package.metadata.docs.rs]
@@ -24,6 +24,7 @@ frame-system = { version = "4.0.0-dev", default-features = false, path = "../sys
 sp-core = { version = "7.0.0", default-features = false, path = "../../primitives/core" }
 sp-io = { version = "7.0.0", default-features = false, path = "../../primitives/io" }
 sp-npos-elections = { version = "4.0.0-dev", default-features = false, path = "../../primitives/npos-elections" }
+frame-election-provider-support = { version = "4.0.0-dev", default-features = false, path = "../election-provider-support" }
 sp-runtime = { version = "7.0.0", default-features = false, path = "../../primitives/runtime" }
 sp-std = { version = "5.0.0", default-features = false, path = "../../primitives/std" }
 
diff --git a/substrate/frame/elections-phragmen/README.md b/substrate/frame/elections/README.md
similarity index 94%
rename from substrate/frame/elections-phragmen/README.md
rename to substrate/frame/elections/README.md
index 26b3f260da5..0f27bdd1891 100644
--- a/substrate/frame/elections-phragmen/README.md
+++ b/substrate/frame/elections/README.md
@@ -1,6 +1,6 @@
-# Phragmén Election Module.
+# Generic Elections Module.
 
-An election module based on sequential phragmen.
+A generic elections module.
 
 ### Term and Round
 
@@ -60,7 +60,7 @@ being re-elected at the end of each round.
 
 ### Module Information
 
-- [`election_sp_phragmen::Config`](https://docs.rs/pallet-elections-phragmen/latest/pallet_elections_phragmen/trait.Config.html)
+- [`elections::Config`](https://docs.rs/pallet-elections-phragmen/latest/pallet_elections_phragmen/trait.Config.html)
 - [`Call`](https://docs.rs/pallet-elections-phragmen/latest/pallet_elections_phragmen/enum.Call.html)
 - [`Module`](https://docs.rs/pallet-elections-phragmen/latest/pallet_elections_phragmen/struct.Module.html)
 
diff --git a/substrate/frame/elections-phragmen/src/benchmarking.rs b/substrate/frame/elections/src/benchmarking.rs
similarity index 85%
rename from substrate/frame/elections-phragmen/src/benchmarking.rs
rename to substrate/frame/elections/src/benchmarking.rs
index 56ea19578c8..da755fe9b56 100644
--- a/substrate/frame/elections-phragmen/src/benchmarking.rs
+++ b/substrate/frame/elections/src/benchmarking.rs
@@ -15,14 +15,14 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-//! Elections-Phragmen pallet benchmarking.
+//! Elections pallet benchmarking.
 
 #![cfg(feature = "runtime-benchmarks")]
 
 use super::*;
 
 use frame_benchmarking::v1::{account, benchmarks, whitelist, BenchmarkError, BenchmarkResult};
-use frame_support::{dispatch::DispatchResultWithPostInfo, traits::OnInitialize};
+use frame_support::dispatch::DispatchResultWithPostInfo;
 use frame_system::RawOrigin;
 
 use crate::Pallet as Elections;
@@ -37,7 +37,7 @@ fn endowed_account<T: Config>(name: &'static str, index: u32) -> T::AccountId {
 	let amount = default_stake::<T>(T::MaxVoters::get()) * BalanceOf::<T>::from(BALANCE_FACTOR);
 	let _ = T::Currency::make_free_balance_be(&account, amount);
 	// important to increase the total issuance since T::CurrencyToVote will need it to be sane for
-	// phragmen to work.
+	// the election to work.
 	T::Currency::issue(amount);
 
 	account
@@ -122,7 +122,7 @@ fn distribute_voters<T: Config>(
 fn fill_seats_up_to<T: Config>(m: u32) -> Result<Vec<T::AccountId>, &'static str> {
 	let _ = submit_candidates_with_self_vote::<T>(m, "fill_seats_up_to")?;
 	assert_eq!(<Elections<T>>::candidates().len() as u32, m, "wrong number of candidates.");
-	<Elections<T>>::do_phragmen();
+	<Elections<T>>::do_election();
 	assert_eq!(<Elections<T>>::candidates().len(), 0, "some candidates remaining.");
 	assert_eq!(
 		<Elections<T>>::members().len() + <Elections<T>>::runners_up().len(),
@@ -382,11 +382,11 @@ benchmarks! {
 		assert_eq!(<Voting<T>>::iter().count() as u32, 0);
 	}
 
-	election_phragmen {
-		// This is just to focus on phragmen in the context of this module. We always select 20
-		// members, this is hard-coded in the runtime and cannot be trivially changed at this stage.
-		// Yet, change the number of voters, candidates and edge per voter to see the impact. Note
-		// that we give all candidates a self vote to make sure they are all considered.
+	pre_solve_election {
+		// We always select 20 members, this is hard-coded in the runtime and cannot be trivially
+		// changed at this stage. Yet, change the number of voters, candidates and edge per voter
+		// to see the impact. Note that we give all candidates a self vote to make sure they are
+		// all considered.
 		let c in 1 .. T::MaxCandidates::get();
 		let v in 1 .. T::MaxVoters::get();
 		let e in (T::MaxVoters::get()) .. T::MaxVoters::get() * T::MaxVotesPerVoter::get();
@@ -404,7 +404,44 @@ benchmarks! {
 		let all_candidates = submit_candidates_with_self_vote::<T>(c, "candidates")?;
 		let _ = distribute_voters::<T>(all_candidates, v.saturating_sub(c), votes_per_voter as usize)?;
 	}: {
-		<Elections<T>>::on_initialize(T::TermDuration::get());
+		<Elections<T>>::do_pre_solve_election().unwrap();
+	}
+
+	post_solve_election {
+		// We always select 20 members, this is hard-coded in the runtime and cannot be trivially
+		// changed at this stage. Yet, change the number of voters, candidates and edge per voter
+		// to see the impact. Note that we give all candidates a self vote to make sure they are
+		// all considered.
+		let c in 1 .. T::MaxCandidates::get();
+		let v in 1 .. T::MaxVoters::get();
+		let e in (T::MaxVoters::get()) .. T::MaxVoters::get() as u32 * T::MaxVotesPerVoter::get() as u32;
+		clean::<T>();
+
+		// so we have a situation with v and e. we want e to basically always be in the range of `e
+		// -> e * T::MaxVotesPerVoter`, but we cannot express that now with the benchmarks. So what we do
+		// is: when c is being iterated, v, and e are max and fine. when v is being iterated, e is
+		// being set to max and this is a problem. In these cases, we cap e to a lower value, namely
+		// v * `T::MaxVotesPerVoter`. when e is being iterated, v is at max, and again fine. all in all,
+		// votes_per_voter can never be more than `T::MaxVotesPerVoter`. Note that this might cause `v` to be
+		// an overestimate.
+		let votes_per_voter = (e / v).min(T::MaxVotesPerVoter::get() as u32);
+
+		let all_candidates = submit_candidates_with_self_vote::<T>(c, "candidates")?;
+		let _ = distribute_voters::<T>(all_candidates, v.saturating_sub(c), votes_per_voter as usize)?;
+
+		let pre_election_result = <Elections<T>>::do_pre_solve_election().unwrap();
+		let election_result = T::ElectionSolver::solve(
+			pre_election_result.num_to_elect,
+			pre_election_result.candidate_ids,
+			pre_election_result.voters_and_votes,
+		).unwrap();
+
+	}: {
+		<Elections<T>>::do_post_solve_election(
+			election_result.winners,
+			pre_election_result.candidates_and_deposit,
+			pre_election_result.voters_and_stakes,
+		);
 	}
 	verify {
 		assert_eq!(<Elections<T>>::members().len() as u32, T::DesiredMembers::get().min(c));
diff --git a/substrate/frame/elections-phragmen/src/lib.rs b/substrate/frame/elections/src/lib.rs
similarity index 90%
rename from substrate/frame/elections-phragmen/src/lib.rs
rename to substrate/frame/elections/src/lib.rs
index fa63762c5e0..bdf0161ba8e 100644
--- a/substrate/frame/elections-phragmen/src/lib.rs
+++ b/substrate/frame/elections/src/lib.rs
@@ -15,9 +15,9 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-//! # Phragmén Election Module.
+//! # Generic Election Module.
 //!
-//! An election module based on sequential phragmen.
+//! An election module based on a generic election algorithm.
 //!
 //! ### Term and Round
 //!
@@ -99,6 +99,7 @@
 #![cfg_attr(not(feature = "std"), no_std)]
 
 use codec::{Decode, Encode};
+use frame_election_provider_support::NposSolver;
 use frame_support::{
 	traits::{
 		defensive_prelude::*, ChangeMembers, Contains, ContainsLengthBound, Currency,
@@ -108,12 +109,12 @@ use frame_support::{
 	weights::Weight,
 };
 use scale_info::TypeInfo;
-use sp_npos_elections::{ElectionResult, ExtendedBalance};
+use sp_npos_elections::{ElectionResult, ExtendedBalance, VoteWeight};
 use sp_runtime::{
 	traits::{Saturating, StaticLookup, Zero},
-	DispatchError, Perbill, RuntimeDebug,
+	DispatchError, RuntimeDebug,
 };
-use sp_std::{cmp::Ordering, prelude::*};
+use sp_std::{cmp::Ordering, iter::IntoIterator, prelude::*};
 
 mod benchmarking;
 pub mod weights;
@@ -122,7 +123,17 @@ pub use weights::WeightInfo;
 /// All migrations.
 pub mod migrations;
 
-const LOG_TARGET: &str = "runtime::elections-phragmen";
+pub(crate) const LOG_TARGET: &str = "runtime::elections";
+
+// logging helper.
+macro_rules! log {
+	($level:tt, $patter:expr $(, $values:expr)* $(,)?) => {
+		log::$level!(
+			target: crate::LOG_TARGET,
+			concat!("[{:?}] 🗳️ ", $patter), <frame_system::Pallet<T>>::block_number() $(, $values)*
+		)
+	};
+}
 
 type BalanceOf<T> =
 	<<T as Config>::Currency as Currency<<T as frame_system::Config>::AccountId>>::Balance;
@@ -173,6 +184,17 @@ pub struct SeatHolder<AccountId, Balance> {
 	pub deposit: Balance,
 }
 
+/// The results of running the pre-election step.
+#[derive(Debug, Clone)]
+struct PreElectionResults<T: Config> {
+	pub num_to_elect: usize,
+	pub candidate_ids: Vec<T::AccountId>,
+	pub candidates_and_deposit: Vec<(T::AccountId, BalanceOf<T>)>,
+	pub voters_and_stakes: Vec<(T::AccountId, BalanceOf<T>, Vec<T::AccountId>)>,
+	pub voters_and_votes: Vec<(T::AccountId, VoteWeight, Vec<T::AccountId>)>,
+	pub num_edges: u32,
+}
+
 pub use pallet::*;
 
 type AccountIdLookupOf<T> = <<T as frame_system::Config>::Lookup as StaticLookup>::Source;
@@ -196,7 +218,7 @@ pub mod pallet {
 	pub trait Config: frame_system::Config {
 		type RuntimeEvent: From<Event<Self>> + IsType<<Self as frame_system::Config>::RuntimeEvent>;
 
-		/// Identifier for the elections-phragmen pallet's lock
+		/// Identifier for the elections pallet's lock
 		#[pallet::constant]
 		type PalletId: Get<LockIdentifier>;
 
@@ -249,7 +271,7 @@ pub mod pallet {
 		#[pallet::constant]
 		type TermDuration: Get<Self::BlockNumber>;
 
-		/// The maximum number of candidates in a phragmen election.
+		/// The maximum number of candidates in an election.
 		///
 		/// Warning: This impacts the size of the election which is run onchain. Chose wisely, and
 		/// consider how it will impact `T::WeightInfo::election_phragmen`.
@@ -258,7 +280,7 @@ pub mod pallet {
 		#[pallet::constant]
 		type MaxCandidates: Get<u32>;
 
-		/// The maximum number of voters to allow in a phragmen election.
+		/// The maximum number of voters to allow in an election.
 		///
 		/// Warning: This impacts the size of the election which is run onchain. Chose wisely, and
 		/// consider how it will impact `T::WeightInfo::election_phragmen`.
@@ -267,6 +289,12 @@ pub mod pallet {
 		#[pallet::constant]
 		type MaxVoters: Get<u32>;
 
+		/// Something that will calculate the result of elections.
+		type ElectionSolver: NposSolver<AccountId = Self::AccountId>;
+
+		/// Weight information for the [`Config::ElectionSolver`].
+		type SolverWeightInfo: frame_election_provider_support::WeightInfo;
+
 		/// Maximum numbers of votes per voter.
 		///
 		/// Warning: This impacts the size of the election which is run onchain. Chose wisely, and
@@ -286,7 +314,7 @@ pub mod pallet {
 		fn on_initialize(n: T::BlockNumber) -> Weight {
 			let term_duration = T::TermDuration::get();
 			if !term_duration.is_zero() && (n % term_duration).is_zero() {
-				Self::do_phragmen()
+				Self::do_election()
 			} else {
 				Weight::zero()
 			}
@@ -295,11 +323,26 @@ pub mod pallet {
 		fn integrity_test() {
 			let block_weight = T::BlockWeights::get().max_block;
 			// mind the order.
-			let election_weight = T::WeightInfo::election_phragmen(
+			let pre_solve_weight = T::WeightInfo::pre_solve_election(
 				T::MaxCandidates::get(),
 				T::MaxVoters::get(),
 				T::MaxVotesPerVoter::get() * T::MaxVoters::get(),
 			);
+			// mind the order.
+			let post_solve_weight = T::WeightInfo::post_solve_election(
+				T::MaxCandidates::get(),
+				T::MaxVoters::get(),
+				T::MaxVotesPerVoter::get() * T::MaxVoters::get(),
+			);
+			// mind the order.
+			let election_weight = T::ElectionSolver::weight::<T::SolverWeightInfo>(
+				T::MaxCandidates::get(),
+				T::MaxVoters::get(),
+				T::MaxVotesPerVoter::get() * T::MaxVoters::get(),
+			);
+			let election_weight = pre_solve_weight
+				.saturating_sub(post_solve_weight)
+				.saturating_add(election_weight);
 
 			let to_seconds = |w: &Weight| {
 				w.ref_time() as f32 /
@@ -534,8 +577,8 @@ pub mod pallet {
 		/// the outgoing member is slashed.
 		///
 		/// If a runner-up is available, then the best runner-up will be removed and replaces the
-		/// outgoing member. Otherwise, if `rerun_election` is `true`, a new phragmen election is
-		/// started, else, nothing happens.
+		/// outgoing member. Otherwise, if `rerun_election` is `true`, a new election is started,
+		/// else, nothing happens.
 		///
 		/// If `slash_bond` is set to true, the bond of the member being removed is slashed. Else,
 		/// it is returned.
@@ -565,7 +608,7 @@ pub mod pallet {
 			Self::deposit_event(Event::MemberKicked { member: who });
 
 			if rerun_election {
-				Self::do_phragmen();
+				Self::do_election();
 			}
 
 			// no refund needed.
@@ -664,6 +707,8 @@ pub mod pallet {
 		InvalidRenouncing,
 		/// Prediction regarding replacement after member removal is wrong.
 		InvalidReplacement,
+		/// No candidates for the next term.
+		EmptyTerm,
 	}
 
 	/// The current elected members.
@@ -742,7 +787,7 @@ pub mod pallet {
 					Members::<T>::mutate(|members| {
 						match members.binary_search_by(|m| m.who.cmp(member)) {
 							Ok(_) => {
-								panic!("Duplicate member in elections-phragmen genesis: {}", member)
+								panic!("Duplicate member in elections genesis: {}", member)
 							},
 							Err(pos) => members.insert(
 								pos,
@@ -934,11 +979,77 @@ impl<T: Config> Pallet<T> {
 		debug_assert!(_remainder.is_zero());
 	}
 
-	/// Run the phragmen election with all required side processes and state updates, if election
-	/// succeeds. Else, it will emit an `ElectionError` event.
+	/// Run an election with all required side processes and state updates, if election
+	/// succeeds. Else, it will emit an `ElectionError` event. The election algorithm is defined
+	/// by the implementor of `Self::ElectionSolver`.
 	///
 	/// Calls the appropriate [`ChangeMembers`] function variant internally.
-	fn do_phragmen() -> Weight {
+	fn do_election() -> Weight {
+		let PreElectionResults {
+			num_to_elect,
+			candidate_ids,
+			candidates_and_deposit,
+			voters_and_stakes,
+			voters_and_votes,
+			num_edges,
+		} = match Self::do_pre_solve_election() {
+			Ok(results) => results,
+			Err(err) => match err {
+				Error::EmptyTerm => {
+					Self::deposit_event(Event::EmptyTerm);
+					return T::DbWeight::get().reads(3)
+				},
+				Error::TooManyVotes => {
+					Self::deposit_event(Event::ElectionError);
+					log!(error, "Failed to run election. Number of voters exceeded",);
+					let max_voters = <T as Config>::MaxVoters::get() as usize;
+					return T::DbWeight::get().reads(3 + max_voters as u64)
+				},
+				_ => {
+					log!(error, "Unexpected pre-election error",);
+					let max_voters = <T as Config>::MaxVoters::get() as usize;
+					return T::DbWeight::get().reads(3 + max_voters as u64)
+				},
+			},
+		};
+
+		let num_candidates = candidates_and_deposit.len() as u32;
+		let num_voters = voters_and_votes.len() as u32;
+		let num_edges = num_edges;
+
+		let election_winners =
+			T::ElectionSolver::solve(num_to_elect, candidate_ids, voters_and_votes)
+				.map(
+					|ElectionResult::<
+						T::AccountId,
+						<T::ElectionSolver as NposSolver>::Accuracy,
+					> {
+					     winners,
+					     assignments: _,
+					 }| winners,
+				)
+				.map_err(|e| {
+					log!(warn, "Failed to run election [{:?}].", e);
+					Self::deposit_event(Event::ElectionError);
+				});
+
+		let post_election_weight = if let Ok(winners) = election_winners {
+			Self::do_post_solve_election(winners, candidates_and_deposit, voters_and_stakes);
+			T::WeightInfo::post_solve_election(num_candidates, num_voters, num_edges)
+		} else {
+			Weight::zero()
+		};
+
+		T::ElectionSolver::weight::<T::SolverWeightInfo>(num_candidates, num_voters, num_edges)
+			.saturating_add(T::WeightInfo::pre_solve_election(
+				num_candidates,
+				num_voters,
+				num_edges,
+			))
+			.saturating_add(post_election_weight)
+	}
+
+	fn do_pre_solve_election() -> Result<PreElectionResults<T>, Error<T>> {
 		let desired_seats = T::DesiredMembers::get() as usize;
 		let desired_runners_up = T::DesiredRunnersUp::get() as usize;
 		let num_to_elect = desired_runners_up + desired_seats;
@@ -948,44 +1059,33 @@ impl<T: Config> Pallet<T> {
 		candidates_and_deposit.append(&mut Self::implicit_candidates_with_deposit());
 
 		if candidates_and_deposit.len().is_zero() {
-			Self::deposit_event(Event::EmptyTerm);
-			return T::DbWeight::get().reads(3)
+			return Err(Error::EmptyTerm)
 		}
 
-		// All of the new winners that come out of phragmen will thus have a deposit recorded.
+		// All of the new winners that come out of the election will thus have a deposit recorded.
 		let candidate_ids =
 			candidates_and_deposit.iter().map(|(x, _)| x).cloned().collect::<Vec<_>>();
 
 		// helper closures to deal with balance/stake.
 		let total_issuance = T::Currency::total_issuance();
 		let to_votes = |b: BalanceOf<T>| T::CurrencyToVote::to_vote(b, total_issuance);
-		let to_balance = |e: ExtendedBalance| T::CurrencyToVote::to_currency(e, total_issuance);
 
 		let mut num_edges: u32 = 0;
 
 		let max_voters = <T as Config>::MaxVoters::get() as usize;
 		// used for prime election.
 		let mut voters_and_stakes = Vec::new();
-		match Voting::<T>::iter().try_for_each(|(voter, Voter { stake, votes, .. })| {
+
+		Voting::<T>::iter().try_for_each(|(voter, Voter { stake, votes, .. })| {
 			if voters_and_stakes.len() < max_voters {
 				voters_and_stakes.push((voter, stake, votes));
 				Ok(())
 			} else {
-				Err(())
+				Err(Error::TooManyVotes)
 			}
-		}) {
-			Ok(_) => (),
-			Err(_) => {
-				log::error!(
-					target: LOG_TARGET,
-					"Failed to run election. Number of voters exceeded",
-				);
-				Self::deposit_event(Event::ElectionError);
-				return T::DbWeight::get().reads(3 + max_voters as u64)
-			},
-		}
+		})?;
 
-		// used for phragmen.
+		// used for elections.
 		let voters_and_votes = voters_and_stakes
 			.iter()
 			.cloned()
@@ -995,157 +1095,144 @@ impl<T: Config> Pallet<T> {
 			})
 			.collect::<Vec<_>>();
 
-		let weight_candidates = candidates_and_deposit.len() as u32;
-		let weight_voters = voters_and_votes.len() as u32;
-		let weight_edges = num_edges;
-		let _ =
-			sp_npos_elections::seq_phragmen(num_to_elect, candidate_ids, voters_and_votes, None)
-				.map(|ElectionResult::<T::AccountId, Perbill> { winners, assignments: _ }| {
-					// this is already sorted by id.
-					let old_members_ids_sorted = <Members<T>>::take()
-						.into_iter()
-						.map(|m| m.who)
-						.collect::<Vec<T::AccountId>>();
-					// this one needs a sort by id.
-					let mut old_runners_up_ids_sorted = <RunnersUp<T>>::take()
-						.into_iter()
-						.map(|r| r.who)
-						.collect::<Vec<T::AccountId>>();
-					old_runners_up_ids_sorted.sort();
-
-					// filter out those who end up with no backing stake.
-					let mut new_set_with_stake = winners
-						.into_iter()
-						.filter_map(
-							|(m, b)| if b.is_zero() { None } else { Some((m, to_balance(b))) },
-						)
-						.collect::<Vec<(T::AccountId, BalanceOf<T>)>>();
-
-					// OPTIMIZATION NOTE: we could bail out here if `new_set.len() == 0`. There
-					// isn't much left to do. Yet, re-arranging the code would require duplicating
-					// the slashing of exposed candidates, cleaning any previous members, and so on.
-					// For now, in favor of readability and veracity, we keep it simple.
-
-					// split new set into winners and runners up.
-					let split_point = desired_seats.min(new_set_with_stake.len());
-					let mut new_members_sorted_by_id =
-						new_set_with_stake.drain(..split_point).collect::<Vec<_>>();
-					new_members_sorted_by_id.sort_by(|i, j| i.0.cmp(&j.0));
-
-					// all the rest will be runners-up
-					new_set_with_stake.reverse();
-					let new_runners_up_sorted_by_rank = new_set_with_stake;
-					let mut new_runners_up_ids_sorted = new_runners_up_sorted_by_rank
-						.iter()
-						.map(|(r, _)| r.clone())
-						.collect::<Vec<_>>();
-					new_runners_up_ids_sorted.sort();
-
-					// Now we select a prime member using a [Borda
-					// count](https://en.wikipedia.org/wiki/Borda_count). We weigh everyone's vote for
-					// that new member by a multiplier based on the order of the votes. i.e. the
-					// first person a voter votes for gets a 16x multiplier, the next person gets a
-					// 15x multiplier, an so on... (assuming `T::MaxVotesPerVoter` = 16)
-					let mut prime_votes = new_members_sorted_by_id
-						.iter()
-						.map(|c| (&c.0, BalanceOf::<T>::zero()))
-						.collect::<Vec<_>>();
-					for (_, stake, votes) in voters_and_stakes.into_iter() {
-						for (vote_multiplier, who) in
-							votes.iter().enumerate().map(|(vote_position, who)| {
-								((T::MaxVotesPerVoter::get() as usize - vote_position) as u32, who)
-							}) {
-							if let Ok(i) = prime_votes.binary_search_by_key(&who, |k| k.0) {
-								prime_votes[i].1 = prime_votes[i]
-									.1
-									.saturating_add(stake.saturating_mul(vote_multiplier.into()));
-							}
-						}
-					}
-					// We then select the new member with the highest weighted stake. In the case of
-					// a tie, the last person in the list with the tied score is selected. This is
-					// the person with the "highest" account id based on the sort above.
-					let prime = prime_votes.into_iter().max_by_key(|x| x.1).map(|x| x.0.clone());
-
-					// new_members_sorted_by_id is sorted by account id.
-					let new_members_ids_sorted = new_members_sorted_by_id
-						.iter()
-						.map(|(m, _)| m.clone())
-						.collect::<Vec<T::AccountId>>();
-
-					// report member changes. We compute diff because we need the outgoing list.
-					let (incoming, outgoing) = T::ChangeMembers::compute_members_diff_sorted(
-						&new_members_ids_sorted,
-						&old_members_ids_sorted,
-					);
-					T::ChangeMembers::change_members_sorted(
-						&incoming,
-						&outgoing,
-						&new_members_ids_sorted,
-					);
-					T::ChangeMembers::set_prime(prime);
-
-					// All candidates/members/runners-up who are no longer retaining a position as a
-					// seat holder will lose their bond.
-					candidates_and_deposit.iter().for_each(|(c, d)| {
-						if new_members_ids_sorted.binary_search(c).is_err() &&
-							new_runners_up_ids_sorted.binary_search(c).is_err()
-						{
-							let (imbalance, _) = T::Currency::slash_reserved(c, *d);
-							T::LoserCandidate::on_unbalanced(imbalance);
-							Self::deposit_event(Event::CandidateSlashed {
-								candidate: c.clone(),
-								amount: *d,
-							});
-						}
-					});
+		Ok(PreElectionResults {
+			num_to_elect,
+			candidate_ids,
+			candidates_and_deposit,
+			voters_and_stakes,
+			voters_and_votes,
+			num_edges,
+		})
+	}
 
-					// write final values to storage.
-					let deposit_of_candidate = |x: &T::AccountId| -> BalanceOf<T> {
-						// defensive-only. This closure is used against the new members and new
-						// runners-up, both of which are phragmen winners and thus must have
-						// deposit.
-						candidates_and_deposit
-							.iter()
-							.find_map(|(c, d)| if c == x { Some(*d) } else { None })
-							.defensive_unwrap_or_default()
-					};
-					// fetch deposits from the one recorded one. This will make sure that a
-					// candidate who submitted candidacy before a change to candidacy deposit will
-					// have the correct amount recorded.
-					<Members<T>>::put(
-						new_members_sorted_by_id
-							.iter()
-							.map(|(who, stake)| SeatHolder {
-								deposit: deposit_of_candidate(who),
-								who: who.clone(),
-								stake: *stake,
-							})
-							.collect::<Vec<_>>(),
-					);
-					<RunnersUp<T>>::put(
-						new_runners_up_sorted_by_rank
-							.into_iter()
-							.map(|(who, stake)| SeatHolder {
-								deposit: deposit_of_candidate(&who),
-								who,
-								stake,
-							})
-							.collect::<Vec<_>>(),
-					);
+	fn do_post_solve_election(
+		winners: Vec<(T::AccountId, u128)>,
+		candidates_and_deposit: Vec<(T::AccountId, BalanceOf<T>)>,
+		voters_and_stakes: Vec<(T::AccountId, BalanceOf<T>, Vec<T::AccountId>)>,
+	) {
+		let desired_seats = T::DesiredMembers::get() as usize;
+		let total_issuance = T::Currency::total_issuance();
+		let to_balance = |e: ExtendedBalance| T::CurrencyToVote::to_currency(e, total_issuance);
 
-					// clean candidates.
-					<Candidates<T>>::kill();
+		// this is already sorted by id.
+		let old_members_ids_sorted =
+			<Members<T>>::take().into_iter().map(|m| m.who).collect::<Vec<T::AccountId>>();
+		// this one needs sorted by id.
+		let mut old_runners_up_ids_sorted =
+			<RunnersUp<T>>::take().into_iter().map(|r| r.who).collect::<Vec<T::AccountId>>();
+		old_runners_up_ids_sorted.sort();
 
-					Self::deposit_event(Event::NewTerm { new_members: new_members_sorted_by_id });
-					<ElectionRounds<T>>::mutate(|v| *v += 1);
-				})
-				.map_err(|e| {
-					log::error!(target: LOG_TARGET, "Failed to run election [{:?}].", e,);
-					Self::deposit_event(Event::ElectionError);
-				});
+		// filter out those who end up with no backing stake.
+		let mut new_set_with_stake = winners
+			.into_iter()
+			.filter_map(|(m, b)| if b.is_zero() { None } else { Some((m, to_balance(b))) })
+			.collect::<Vec<(T::AccountId, BalanceOf<T>)>>();
+
+		// OPTIMIZATION NOTE: we could bail out here if `new_set.len() == 0`. There
+		// isn't much left to do. Yet, re-arranging the code would require duplicating
+		// the slashing of exposed candidates, cleaning any previous members, and so on.
+		// For now, in favor of readability and veracity, we keep it simple.
+
+		// split new set into winners and runners up.
+		let split_point = desired_seats.min(new_set_with_stake.len());
+		let mut new_members_sorted_by_id =
+			new_set_with_stake.drain(..split_point).collect::<Vec<_>>();
+		new_members_sorted_by_id.sort_by(|i, j| i.0.cmp(&j.0));
+
+		// all the rest will be runners-up
+		new_set_with_stake.reverse();
+		let new_runners_up_sorted_by_rank = new_set_with_stake;
+		let mut new_runners_up_ids_sorted =
+			new_runners_up_sorted_by_rank.iter().map(|(r, _)| r.clone()).collect::<Vec<_>>();
+		new_runners_up_ids_sorted.sort();
+
+		// Now we select a prime member using a [Borda
+		// count](https://en.wikipedia.org/wiki/Borda_count). We weigh everyone's vote for
+		// that new member by a multiplier based on the order of the votes. i.e. the
+		// first person a voter votes for gets a 16x multiplier, the next person gets a
+		// 15x multiplier, an so on... (assuming `T::MaxVotesPerVoter` = 16).
+		let mut prime_votes = new_members_sorted_by_id
+			.iter()
+			.map(|c| (&c.0, BalanceOf::<T>::zero()))
+			.collect::<Vec<_>>();
+		for (_, stake, votes) in voters_and_stakes.into_iter() {
+			for (vote_multiplier, who) in votes.iter().enumerate().map(|(vote_position, who)| {
+				((T::MaxVotesPerVoter::get() as usize - vote_position) as u32, who)
+			}) {
+				if let Ok(i) = prime_votes.binary_search_by_key(&who, |k| k.0) {
+					prime_votes[i].1 = prime_votes[i]
+						.1
+						.saturating_add(stake.saturating_mul(vote_multiplier.into()));
+				}
+			}
+		}
+		// We then select the new member with the highest weighted stake. In the case of
+		// a tie, the last person in the list with the tied score is selected. This is
+		// the person with the "highest" account id based on the sort above.
+		let prime = prime_votes.into_iter().max_by_key(|x| x.1).map(|x| x.0.clone());
 
-		T::WeightInfo::election_phragmen(weight_candidates, weight_voters, weight_edges)
+		// new_members_sorted_by_id is sorted by account id.
+		let new_members_ids_sorted = new_members_sorted_by_id
+			.iter()
+			.map(|(m, _)| m.clone())
+			.collect::<Vec<T::AccountId>>();
+
+		// report member changes. We compute diff because we need the outgoing list.
+		let (incoming, outgoing) = T::ChangeMembers::compute_members_diff_sorted(
+			&new_members_ids_sorted,
+			&old_members_ids_sorted,
+		);
+		T::ChangeMembers::change_members_sorted(&incoming, &outgoing, &new_members_ids_sorted);
+		T::ChangeMembers::set_prime(prime);
+
+		// All candidates/members/runners-up who are no longer retaining a position as a
+		// seat holder will lose their bond.
+		candidates_and_deposit.iter().for_each(|(c, d)| {
+			if new_members_ids_sorted.binary_search(c).is_err() &&
+				new_runners_up_ids_sorted.binary_search(c).is_err()
+			{
+				let (imbalance, _) = T::Currency::slash_reserved(c, *d);
+				T::LoserCandidate::on_unbalanced(imbalance);
+				Self::deposit_event(Event::CandidateSlashed { candidate: c.clone(), amount: *d });
+			}
+		});
+
+		// write final values to storage.
+		let deposit_of_candidate = |x: &T::AccountId| -> BalanceOf<T> {
+			// defensive-only. This closure is used against the new members and new
+			// runners-up, both of which are election winners and thus must have
+			// deposit.
+			candidates_and_deposit
+				.iter()
+				.find_map(|(c, d)| if c == x { Some(*d) } else { None })
+				.defensive_unwrap_or_default()
+		};
+		// fetch deposits from the one recorded one. This will make sure that a
+		// candidate who submitted candidacy before a change to candidacy deposit will
+		// have the correct amount recorded.
+		<Members<T>>::put(
+			new_members_sorted_by_id
+				.iter()
+				.map(|(who, stake)| SeatHolder {
+					deposit: deposit_of_candidate(who),
+					who: who.clone(),
+					stake: *stake,
+				})
+				.collect::<Vec<_>>(),
+		);
+		<RunnersUp<T>>::put(
+			new_runners_up_sorted_by_rank
+				.into_iter()
+				.map(|(who, stake)| SeatHolder { deposit: deposit_of_candidate(&who), who, stake })
+				.collect::<Vec<_>>(),
+		);
+
+		// clean candidates.
+		<Candidates<T>>::kill();
+
+		log!(info, "New term election successful.");
+		Self::deposit_event(Event::NewTerm { new_members: new_members_sorted_by_id });
+		<ElectionRounds<T>>::mutate(|v| *v += 1);
 	}
 }
 
@@ -1196,7 +1283,8 @@ impl<T: Config> ContainsLengthBound for Pallet<T> {
 #[cfg(test)]
 mod tests {
 	use super::*;
-	use crate as elections_phragmen;
+	use crate as elections;
+	use frame_election_provider_support::{weights::SubstrateWeight, ApprovalVoting};
 	use frame_support::{
 		assert_noop, assert_ok,
 		dispatch::DispatchResultWithPostInfo,
@@ -1208,7 +1296,7 @@ mod tests {
 	use sp_runtime::{
 		testing::Header,
 		traits::{BlakeTwo256, IdentityLookup},
-		BuildStorage,
+		BuildStorage, Perbill,
 	};
 	use substrate_test_utils::assert_eq_uvec;
 
@@ -1307,13 +1395,13 @@ mod tests {
 	}
 
 	parameter_types! {
-		pub const ElectionsPhragmenPalletId: LockIdentifier = *b"phrelect";
-		pub const PhragmenMaxVoters: u32 = 1000;
-		pub const PhragmenMaxCandidates: u32 = 100;
+		pub const ElectionsPalletId: LockIdentifier = *b"phrelect";
+		pub const MaxVoters: u32 = 256;
+		pub const MaxCandidates: u32 = 64;
 	}
 
 	impl Config for Test {
-		type PalletId = ElectionsPhragmenPalletId;
+		type PalletId = ElectionsPalletId;
 		type RuntimeEvent = RuntimeEvent;
 		type Currency = Balances;
 		type CurrencyToVote = frame_support::traits::SaturatingCurrencyToVote;
@@ -1328,9 +1416,11 @@ mod tests {
 		type LoserCandidate = ();
 		type KickedMember = ();
 		type WeightInfo = ();
-		type MaxVoters = PhragmenMaxVoters;
+		type MaxVoters = MaxVoters;
+		type MaxCandidates = MaxCandidates;
+		type ElectionSolver = ApprovalVoting<Self::AccountId, Perbill>;
+		type SolverWeightInfo = SubstrateWeight<Test>;
 		type MaxVotesPerVoter = ConstU32<16>;
-		type MaxCandidates = PhragmenMaxCandidates;
 	}
 
 	pub type Block = sp_runtime::generic::Block<Header, UncheckedExtrinsic>;
@@ -1345,7 +1435,7 @@ mod tests {
 		{
 			System: frame_system::{Pallet, Call, Event<T>},
 			Balances: pallet_balances::{Pallet, Call, Event<T>, Config<T>},
-			Elections: elections_phragmen::{Pallet, Call, Event<T>, Config<T>},
+			Elections: elections::{Pallet, Call, Event<T>, Config<T>},
 		}
 	);
 
@@ -1406,9 +1496,7 @@ mod tests {
 						(6, 60 * self.balance_factor),
 					],
 				},
-				elections: elections_phragmen::GenesisConfig::<Test> {
-					members: self.genesis_members,
-				},
+				elections: elections::GenesisConfig::<Test> { members: self.genesis_members },
 			}
 			.build_storage()
 			.unwrap()
@@ -1466,7 +1554,7 @@ mod tests {
 			.get(0)
 			.cloned()
 			.map(|lock| {
-				assert_eq!(lock.id, ElectionsPhragmenPalletId::get());
+				assert_eq!(lock.id, ElectionsPalletId::get());
 				lock.amount
 			})
 			.unwrap_or_default()
@@ -1657,7 +1745,7 @@ mod tests {
 	}
 
 	#[test]
-	#[should_panic = "Duplicate member in elections-phragmen genesis: 2"]
+	#[should_panic = "Duplicate member in elections genesis: 2"]
 	fn genesis_members_cannot_be_duplicate() {
 		ExtBuilder::default()
 			.desired_members(3)
diff --git a/substrate/frame/elections-phragmen/src/migrations/mod.rs b/substrate/frame/elections/src/migrations/mod.rs
similarity index 100%
rename from substrate/frame/elections-phragmen/src/migrations/mod.rs
rename to substrate/frame/elections/src/migrations/mod.rs
diff --git a/substrate/frame/elections-phragmen/src/migrations/v3.rs b/substrate/frame/elections/src/migrations/v3.rs
similarity index 100%
rename from substrate/frame/elections-phragmen/src/migrations/v3.rs
rename to substrate/frame/elections/src/migrations/v3.rs
diff --git a/substrate/frame/elections-phragmen/src/migrations/v4.rs b/substrate/frame/elections/src/migrations/v4.rs
similarity index 100%
rename from substrate/frame/elections-phragmen/src/migrations/v4.rs
rename to substrate/frame/elections/src/migrations/v4.rs
diff --git a/substrate/frame/elections-phragmen/src/migrations/v5.rs b/substrate/frame/elections/src/migrations/v5.rs
similarity index 100%
rename from substrate/frame/elections-phragmen/src/migrations/v5.rs
rename to substrate/frame/elections/src/migrations/v5.rs
diff --git a/substrate/frame/elections/src/weights.rs b/substrate/frame/elections/src/weights.rs
new file mode 100644
index 00000000000..8caa93f0aa8
--- /dev/null
+++ b/substrate/frame/elections/src/weights.rs
@@ -0,0 +1,397 @@
+// This file is part of Substrate.
+
+// Copyright (C) 2022 Parity Technologies (UK) Ltd.
+// SPDX-License-Identifier: Apache-2.0
+
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 	http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+//! Autogenerated weights for pallet_elections
+//!
+//! THIS FILE WAS AUTO-GENERATED USING THE SUBSTRATE BENCHMARK CLI VERSION 4.0.0-dev
+//! DATE: 2022-11-22, STEPS: `50`, REPEAT: 20, LOW RANGE: `[]`, HIGH RANGE: `[]`
+//! HOSTNAME: `bm3`, CPU: `Intel(R) Core(TM) i7-7700K CPU @ 4.20GHz`
+//! EXECUTION: Some(Wasm), WASM-EXECUTION: Compiled, CHAIN: Some("dev"), DB CACHE: 1024
+
+// Executed Command:
+// /home/benchbot/cargo_target_dir/production/substrate
+// benchmark
+// pallet
+// --steps=50
+// --repeat=20
+// --extrinsic=*
+// --execution=wasm
+// --wasm-execution=compiled
+// --heap-pages=4096
+// --json-file=/var/lib/gitlab-runner/builds/zyw4fam_/0/parity/mirrors/substrate/.git/.artifacts/bench.json
+// --pallet=pallet_elections
+// --chain=dev
+// --header=./HEADER-APACHE2
+// --output=./frame/elections/src/weights.rs
+// --template=./.maintain/frame-weight-template.hbs
+
+#![cfg_attr(rustfmt, rustfmt_skip)]
+#![allow(unused_parens)]
+#![allow(unused_imports)]
+
+use frame_support::{traits::Get, weights::{Weight, constants::RocksDbWeight}};
+use sp_std::marker::PhantomData;
+
+/// Weight functions needed for pallet_elections.
+pub trait WeightInfo {
+	fn vote_equal(v: u32, ) -> Weight;
+	fn vote_more(v: u32, ) -> Weight;
+	fn vote_less(v: u32, ) -> Weight;
+	fn remove_voter() -> Weight;
+	fn submit_candidacy(c: u32, ) -> Weight;
+	fn renounce_candidacy_candidate(c: u32, ) -> Weight;
+	fn renounce_candidacy_members() -> Weight;
+	fn renounce_candidacy_runners_up() -> Weight;
+	fn remove_member_without_replacement() -> Weight;
+	fn remove_member_with_replacement() -> Weight;
+	fn clean_defunct_voters(v: u32, d: u32, ) -> Weight;
+	fn pre_solve_election(c: u32, v: u32, e: u32, ) -> Weight;
+	fn post_solve_election(c: u32, v: u32, e: u32, ) -> Weight;
+}
+
+/// Weights for pallet_elections using the Substrate node and recommended hardware.
+pub struct SubstrateWeight<T>(PhantomData<T>);
+impl<T: frame_system::Config> WeightInfo for SubstrateWeight<T> {
+	// Storage: Elections Candidates (r:1 w:0)
+	// Storage: Elections Members (r:1 w:0)
+	// Storage: Elections RunnersUp (r:1 w:0)
+	// Storage: Elections Voting (r:1 w:1)
+	// Storage: Balances Locks (r:1 w:1)
+	/// The range of component `v` is `[1, 16]`.
+	fn vote_equal(v: u32, ) -> Weight {
+		// Minimum execution time: 37_500 nanoseconds.
+		Weight::from_ref_time(38_575_649)
+			// Standard Error: 2_961
+			.saturating_add(Weight::from_ref_time(154_225).saturating_mul(v.into()))
+			.saturating_add(T::DbWeight::get().reads(5))
+			.saturating_add(T::DbWeight::get().writes(2))
+	}
+	// Storage: Elections Candidates (r:1 w:0)
+	// Storage: Elections Members (r:1 w:0)
+	// Storage: Elections RunnersUp (r:1 w:0)
+	// Storage: Elections Voting (r:1 w:1)
+	// Storage: Balances Locks (r:1 w:1)
+	/// The range of component `v` is `[2, 16]`.
+	fn vote_more(v: u32, ) -> Weight {
+		// Minimum execution time: 48_836 nanoseconds.
+		Weight::from_ref_time(49_566_969)
+			// Standard Error: 3_258
+			.saturating_add(Weight::from_ref_time(153_342).saturating_mul(v.into()))
+			.saturating_add(T::DbWeight::get().reads(5))
+			.saturating_add(T::DbWeight::get().writes(2))
+	}
+	// Storage: Elections Candidates (r:1 w:0)
+	// Storage: Elections Members (r:1 w:0)
+	// Storage: Elections RunnersUp (r:1 w:0)
+	// Storage: Elections Voting (r:1 w:1)
+	// Storage: Balances Locks (r:1 w:1)
+	/// The range of component `v` is `[2, 16]`.
+	fn vote_less(v: u32, ) -> Weight {
+		// Minimum execution time: 47_664 nanoseconds.
+		Weight::from_ref_time(48_768_157)
+			// Standard Error: 3_321
+			.saturating_add(Weight::from_ref_time(215_112).saturating_mul(v.into()))
+			.saturating_add(T::DbWeight::get().reads(5))
+			.saturating_add(T::DbWeight::get().writes(2))
+	}
+	// Storage: Elections Voting (r:1 w:1)
+	// Storage: Balances Locks (r:1 w:1)
+	fn remove_voter() -> Weight {
+		// Minimum execution time: 47_146 nanoseconds.
+		Weight::from_ref_time(47_846_000)
+			.saturating_add(T::DbWeight::get().reads(2))
+			.saturating_add(T::DbWeight::get().writes(2))
+	}
+	// Storage: Elections Candidates (r:1 w:1)
+	// Storage: Elections Members (r:1 w:0)
+	// Storage: Elections RunnersUp (r:1 w:0)
+	/// The range of component `c` is `[1, 1000]`.
+	fn submit_candidacy(c: u32, ) -> Weight {
+		// Minimum execution time: 42_799 nanoseconds.
+		Weight::from_ref_time(46_920_164)
+			// Standard Error: 780
+			.saturating_add(Weight::from_ref_time(81_672).saturating_mul(c.into()))
+			.saturating_add(T::DbWeight::get().reads(3))
+			.saturating_add(T::DbWeight::get().writes(1))
+	}
+	// Storage: Elections Candidates (r:1 w:1)
+	/// The range of component `c` is `[1, 1000]`.
+	fn renounce_candidacy_candidate(c: u32, ) -> Weight {
+		// Minimum execution time: 40_946 nanoseconds.
+		Weight::from_ref_time(53_109_738)
+			// Standard Error: 1_220
+			.saturating_add(Weight::from_ref_time(60_643).saturating_mul(c.into()))
+			.saturating_add(T::DbWeight::get().reads(1))
+			.saturating_add(T::DbWeight::get().writes(1))
+	}
+	// Storage: Elections Members (r:1 w:1)
+	// Storage: Elections RunnersUp (r:1 w:1)
+	// Storage: Council Prime (r:1 w:1)
+	// Storage: Council Proposals (r:1 w:0)
+	// Storage: Council Members (r:0 w:1)
+	fn renounce_candidacy_members() -> Weight {
+		// Minimum execution time: 53_454 nanoseconds.
+		Weight::from_ref_time(53_921_000)
+			.saturating_add(T::DbWeight::get().reads(4))
+			.saturating_add(T::DbWeight::get().writes(4))
+	}
+	// Storage: Elections RunnersUp (r:1 w:1)
+	fn renounce_candidacy_runners_up() -> Weight {
+		// Minimum execution time: 41_275 nanoseconds.
+		Weight::from_ref_time(42_444_000)
+			.saturating_add(T::DbWeight::get().reads(1))
+			.saturating_add(T::DbWeight::get().writes(1))
+	}
+	// Storage: Benchmark Override (r:0 w:0)
+	fn remove_member_without_replacement() -> Weight {
+		// Minimum execution time: 2_000_000_000 nanoseconds.
+		Weight::from_ref_time(2_000_000_000_000)
+	}
+	// Storage: Elections Members (r:1 w:1)
+	// Storage: System Account (r:1 w:1)
+	// Storage: Elections RunnersUp (r:1 w:1)
+	// Storage: Council Prime (r:1 w:1)
+	// Storage: Council Proposals (r:1 w:0)
+	// Storage: Council Members (r:0 w:1)
+	fn remove_member_with_replacement() -> Weight {
+		// Minimum execution time: 62_040 nanoseconds.
+		Weight::from_ref_time(62_569_000)
+			.saturating_add(T::DbWeight::get().reads(5))
+			.saturating_add(T::DbWeight::get().writes(5))
+	}
+	// Storage: Elections Voting (r:5001 w:5000)
+	// Storage: Elections Members (r:1 w:0)
+	// Storage: Elections RunnersUp (r:1 w:0)
+	// Storage: Elections Candidates (r:1 w:0)
+	// Storage: Balances Locks (r:5000 w:5000)
+	// Storage: System Account (r:5000 w:5000)
+	/// The range of component `v` is `[5000, 10000]`.
+	/// The range of component `d` is `[0, 5000]`.
+	fn clean_defunct_voters(v: u32, _d: u32, ) -> Weight {
+		// Minimum execution time: 298_212_195 nanoseconds.
+		Weight::from_ref_time(298_678_889_000)
+			// Standard Error: 264_713
+			.saturating_add(Weight::from_ref_time(38_222_955).saturating_mul(v.into()))
+			.saturating_add(T::DbWeight::get().reads(4))
+			.saturating_add(T::DbWeight::get().reads((3_u64).saturating_mul(v.into())))
+			.saturating_add(T::DbWeight::get().writes((3_u64).saturating_mul(v.into())))
+	}
+	// Storage: Elections Candidates (r:1 w:0)
+	// Storage: Elections Members (r:1 w:0)
+	// Storage: Elections RunnersUp (r:1 w:0)
+	// Storage: Elections Voting (r:10001 w:0)
+	/// The range of component `c` is `[1, 1000]`.
+	/// The range of component `v` is `[1, 10000]`.
+	/// The range of component `e` is `[10000, 160000]`.
+	fn pre_solve_election(_c: u32, v: u32, _e: u32, ) -> Weight {
+		// Minimum execution time: 6_543_626 nanoseconds.
+		Weight::from_ref_time(6_627_885_000)
+			// Standard Error: 14_605
+			.saturating_add(Weight::from_ref_time(7_613_226).saturating_mul(v.into()))
+			.saturating_add(T::DbWeight::get().reads(296))
+			.saturating_add(T::DbWeight::get().reads((1_u64).saturating_mul(v.into())))
+	}
+	// Storage: Elections Members (r:1 w:1)
+	// Storage: Elections RunnersUp (r:1 w:1)
+	// Storage: Council Proposals (r:1 w:0)
+	// Storage: Elections ElectionRounds (r:1 w:1)
+	// Storage: Elections Candidates (r:0 w:1)
+	// Storage: Council Members (r:0 w:1)
+	// Storage: Council Prime (r:0 w:1)
+	// Storage: System Account (r:1 w:1)
+	/// The range of component `c` is `[1, 1000]`.
+	/// The range of component `v` is `[1, 10000]`.
+	/// The range of component `e` is `[10000, 160000]`.
+	fn post_solve_election(c: u32, v: u32, _e: u32, ) -> Weight {
+		// Minimum execution time: 3_843_566 nanoseconds.
+		Weight::from_ref_time(3_854_020_000)
+			// Standard Error: 59_766
+			.saturating_add(Weight::from_ref_time(9_622_797).saturating_mul(c.into()))
+			// Standard Error: 5_975
+			.saturating_add(Weight::from_ref_time(541_471).saturating_mul(v.into()))
+			.saturating_add(T::DbWeight::get().reads(4))
+			.saturating_add(T::DbWeight::get().reads((1_u64).saturating_mul(c.into())))
+			.saturating_add(T::DbWeight::get().writes(6))
+			.saturating_add(T::DbWeight::get().writes((1_u64).saturating_mul(c.into())))
+	}
+}
+
+// For backwards compatibility and tests
+impl WeightInfo for () {
+	// Storage: Elections Candidates (r:1 w:0)
+	// Storage: Elections Members (r:1 w:0)
+	// Storage: Elections RunnersUp (r:1 w:0)
+	// Storage: Elections Voting (r:1 w:1)
+	// Storage: Balances Locks (r:1 w:1)
+	/// The range of component `v` is `[1, 16]`.
+	fn vote_equal(v: u32, ) -> Weight {
+		// Minimum execution time: 37_500 nanoseconds.
+		Weight::from_ref_time(38_575_649)
+			// Standard Error: 2_961
+			.saturating_add(Weight::from_ref_time(154_225).saturating_mul(v.into()))
+			.saturating_add(RocksDbWeight::get().reads(5))
+			.saturating_add(RocksDbWeight::get().writes(2))
+	}
+	// Storage: Elections Candidates (r:1 w:0)
+	// Storage: Elections Members (r:1 w:0)
+	// Storage: Elections RunnersUp (r:1 w:0)
+	// Storage: Elections Voting (r:1 w:1)
+	// Storage: Balances Locks (r:1 w:1)
+	/// The range of component `v` is `[2, 16]`.
+	fn vote_more(v: u32, ) -> Weight {
+		// Minimum execution time: 48_836 nanoseconds.
+		Weight::from_ref_time(49_566_969)
+			// Standard Error: 3_258
+			.saturating_add(Weight::from_ref_time(153_342).saturating_mul(v.into()))
+			.saturating_add(RocksDbWeight::get().reads(5))
+			.saturating_add(RocksDbWeight::get().writes(2))
+	}
+	// Storage: Elections Candidates (r:1 w:0)
+	// Storage: Elections Members (r:1 w:0)
+	// Storage: Elections RunnersUp (r:1 w:0)
+	// Storage: Elections Voting (r:1 w:1)
+	// Storage: Balances Locks (r:1 w:1)
+	/// The range of component `v` is `[2, 16]`.
+	fn vote_less(v: u32, ) -> Weight {
+		// Minimum execution time: 47_664 nanoseconds.
+		Weight::from_ref_time(48_768_157)
+			// Standard Error: 3_321
+			.saturating_add(Weight::from_ref_time(215_112).saturating_mul(v.into()))
+			.saturating_add(RocksDbWeight::get().reads(5))
+			.saturating_add(RocksDbWeight::get().writes(2))
+	}
+	// Storage: Elections Voting (r:1 w:1)
+	// Storage: Balances Locks (r:1 w:1)
+	fn remove_voter() -> Weight {
+		// Minimum execution time: 47_146 nanoseconds.
+		Weight::from_ref_time(47_846_000)
+			.saturating_add(RocksDbWeight::get().reads(2))
+			.saturating_add(RocksDbWeight::get().writes(2))
+	}
+	// Storage: Elections Candidates (r:1 w:1)
+	// Storage: Elections Members (r:1 w:0)
+	// Storage: Elections RunnersUp (r:1 w:0)
+	/// The range of component `c` is `[1, 1000]`.
+	fn submit_candidacy(c: u32, ) -> Weight {
+		// Minimum execution time: 42_799 nanoseconds.
+		Weight::from_ref_time(46_920_164)
+			// Standard Error: 780
+			.saturating_add(Weight::from_ref_time(81_672).saturating_mul(c.into()))
+			.saturating_add(RocksDbWeight::get().reads(3))
+			.saturating_add(RocksDbWeight::get().writes(1))
+	}
+	// Storage: Elections Candidates (r:1 w:1)
+	/// The range of component `c` is `[1, 1000]`.
+	fn renounce_candidacy_candidate(c: u32, ) -> Weight {
+		// Minimum execution time: 40_946 nanoseconds.
+		Weight::from_ref_time(53_109_738)
+			// Standard Error: 1_220
+			.saturating_add(Weight::from_ref_time(60_643).saturating_mul(c.into()))
+			.saturating_add(RocksDbWeight::get().reads(1))
+			.saturating_add(RocksDbWeight::get().writes(1))
+	}
+	// Storage: Elections Members (r:1 w:1)
+	// Storage: Elections RunnersUp (r:1 w:1)
+	// Storage: Council Prime (r:1 w:1)
+	// Storage: Council Proposals (r:1 w:0)
+	// Storage: Council Members (r:0 w:1)
+	fn renounce_candidacy_members() -> Weight {
+		// Minimum execution time: 53_454 nanoseconds.
+		Weight::from_ref_time(53_921_000)
+			.saturating_add(RocksDbWeight::get().reads(4))
+			.saturating_add(RocksDbWeight::get().writes(4))
+	}
+	// Storage: Elections RunnersUp (r:1 w:1)
+	fn renounce_candidacy_runners_up() -> Weight {
+		// Minimum execution time: 41_275 nanoseconds.
+		Weight::from_ref_time(42_444_000)
+			.saturating_add(RocksDbWeight::get().reads(1))
+			.saturating_add(RocksDbWeight::get().writes(1))
+	}
+	// Storage: Benchmark Override (r:0 w:0)
+	fn remove_member_without_replacement() -> Weight {
+		// Minimum execution time: 2_000_000_000 nanoseconds.
+		Weight::from_ref_time(2_000_000_000_000)
+	}
+	// Storage: Elections Members (r:1 w:1)
+	// Storage: System Account (r:1 w:1)
+	// Storage: Elections RunnersUp (r:1 w:1)
+	// Storage: Council Prime (r:1 w:1)
+	// Storage: Council Proposals (r:1 w:0)
+	// Storage: Council Members (r:0 w:1)
+	fn remove_member_with_replacement() -> Weight {
+		// Minimum execution time: 62_040 nanoseconds.
+		Weight::from_ref_time(62_569_000)
+			.saturating_add(RocksDbWeight::get().reads(5))
+			.saturating_add(RocksDbWeight::get().writes(5))
+	}
+	// Storage: Elections Voting (r:5001 w:5000)
+	// Storage: Elections Members (r:1 w:0)
+	// Storage: Elections RunnersUp (r:1 w:0)
+	// Storage: Elections Candidates (r:1 w:0)
+	// Storage: Balances Locks (r:5000 w:5000)
+	// Storage: System Account (r:5000 w:5000)
+	/// The range of component `v` is `[5000, 10000]`.
+	/// The range of component `d` is `[0, 5000]`.
+	fn clean_defunct_voters(v: u32, _d: u32, ) -> Weight {
+		// Minimum execution time: 298_212_195 nanoseconds.
+		Weight::from_ref_time(298_678_889_000)
+			// Standard Error: 264_713
+			.saturating_add(Weight::from_ref_time(38_222_955).saturating_mul(v.into()))
+			.saturating_add(RocksDbWeight::get().reads(4))
+			.saturating_add(RocksDbWeight::get().reads((3_u64).saturating_mul(v.into())))
+			.saturating_add(RocksDbWeight::get().writes((3_u64).saturating_mul(v.into())))
+	}
+	// Storage: Elections Candidates (r:1 w:0)
+	// Storage: Elections Members (r:1 w:0)
+	// Storage: Elections RunnersUp (r:1 w:0)
+	// Storage: Elections Voting (r:10001 w:0)
+	/// The range of component `c` is `[1, 1000]`.
+	/// The range of component `v` is `[1, 10000]`.
+	/// The range of component `e` is `[10000, 160000]`.
+	fn pre_solve_election(_c: u32, v: u32, _e: u32, ) -> Weight {
+		// Minimum execution time: 6_543_626 nanoseconds.
+		Weight::from_ref_time(6_627_885_000)
+			// Standard Error: 14_605
+			.saturating_add(Weight::from_ref_time(7_613_226).saturating_mul(v.into()))
+			.saturating_add(RocksDbWeight::get().reads(296))
+			.saturating_add(RocksDbWeight::get().reads((1_u64).saturating_mul(v.into())))
+	}
+	// Storage: Elections Members (r:1 w:1)
+	// Storage: Elections RunnersUp (r:1 w:1)
+	// Storage: Council Proposals (r:1 w:0)
+	// Storage: Elections ElectionRounds (r:1 w:1)
+	// Storage: Elections Candidates (r:0 w:1)
+	// Storage: Council Members (r:0 w:1)
+	// Storage: Council Prime (r:0 w:1)
+	// Storage: System Account (r:1 w:1)
+	/// The range of component `c` is `[1, 1000]`.
+	/// The range of component `v` is `[1, 10000]`.
+	/// The range of component `e` is `[10000, 160000]`.
+	fn post_solve_election(c: u32, v: u32, _e: u32, ) -> Weight {
+		// Minimum execution time: 3_843_566 nanoseconds.
+		Weight::from_ref_time(3_854_020_000)
+			// Standard Error: 59_766
+			.saturating_add(Weight::from_ref_time(9_622_797).saturating_mul(c.into()))
+			// Standard Error: 5_975
+			.saturating_add(Weight::from_ref_time(541_471).saturating_mul(v.into()))
+			.saturating_add(RocksDbWeight::get().reads(4))
+			.saturating_add(RocksDbWeight::get().reads((1_u64).saturating_mul(c.into())))
+			.saturating_add(RocksDbWeight::get().writes(6))
+			.saturating_add(RocksDbWeight::get().writes((1_u64).saturating_mul(c.into())))
+	}
+}
diff --git a/substrate/primitives/npos-elections/src/approval_voting.rs b/substrate/primitives/npos-elections/src/approval_voting.rs
new file mode 100644
index 00000000000..2fcf17b6056
--- /dev/null
+++ b/substrate/primitives/npos-elections/src/approval_voting.rs
@@ -0,0 +1,79 @@
+// This file is part of Substrate.
+
+// Copyright (C) 2023 Parity Technologies (UK) Ltd.
+// SPDX-License-Identifier: Apache-2.0
+
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 	http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+//! Implementation of the approval voting election method.
+//!
+//! This method allows voters to select many candidates and backing each of them with the same
+//! vote weight. The candidates with the most backing are the election winners.
+
+use crate::{setup_inputs, ElectionResult, IdentifierT, PerThing128, VoteWeight};
+use sp_arithmetic::traits::Zero;
+use sp_std::{cmp::Reverse, vec::Vec};
+
+/// Execute an approvals voting election scheme. The return type is a list of winners. The weight
+/// vector of all voters who contribute to the winners, which for this scheme is always 100% per
+/// vote.
+///
+/// - The vote assignment distribution for each vote is always 100%, since a voter backs a candidate
+///   with its full stake, regardless of how many candidates are backed by the same stake. However,
+///   the caller may normalize votes on site if required.
+/// - Returning winners are sorted based on desirability. Voters are unsorted.
+/// - The returning winners are zipped with their final backing stake. Yet, to get the exact final
+///   weight distribution from the winner's point of view, one needs to build a support map. See
+///   [`crate::SupportMap`] for more info. Note that this backing stake is computed in
+///   ExtendedBalance and may be slightly different that what will be computed from the support map,
+///   due to accuracy loss.
+///
+/// This can only fail if the normalization fails. This can happen if for any of the resulting
+/// assignments, `assignment.distribution.map(|p| p.deconstruct()).sum()` fails to fit inside
+/// `UpperOf<P>`. A user of this crate may statically assert that this can never happen and safely
+/// `expect` this to return `Ok`.
+pub fn approval_voting<AccountId: IdentifierT, P: PerThing128>(
+	to_elect: usize,
+	candidates: Vec<AccountId>,
+	voters: Vec<(AccountId, VoteWeight, impl IntoIterator<Item = AccountId>)>,
+) -> Result<ElectionResult<AccountId, P>, crate::Error> {
+	let to_elect = to_elect.min(candidates.len());
+
+	let (mut candidates, mut voters) = setup_inputs(candidates, voters);
+
+	candidates.sort_by_key(|c| Reverse(c.borrow().approval_stake));
+
+	let winners = candidates
+		.into_iter()
+		.take(to_elect)
+		.map(|w| {
+			w.borrow_mut().elected = true;
+			w
+		})
+		.map(|w_ptr| (w_ptr.borrow().who.clone(), w_ptr.borrow().approval_stake))
+		.collect();
+
+	for voter in &mut voters {
+		for edge in &mut voter.edges {
+			if edge.candidate.borrow().elected {
+				edge.weight = voter.budget
+			} else {
+				edge.weight = Zero::zero()
+			}
+		}
+	}
+
+	let assignments = voters.into_iter().filter_map(|v| v.into_assignment()).collect::<Vec<_>>();
+
+	Ok(ElectionResult { winners, assignments })
+}
diff --git a/substrate/primitives/npos-elections/src/lib.rs b/substrate/primitives/npos-elections/src/lib.rs
index 716c4b283c6..a1a38b9b0df 100644
--- a/substrate/primitives/npos-elections/src/lib.rs
+++ b/substrate/primitives/npos-elections/src/lib.rs
@@ -25,6 +25,8 @@
 //! - [`balance`](balancing::balance): Implements the star balancing algorithm. This iterative
 //!   process can push a solution toward being more "balanced", which in turn can increase its
 //!   score.
+//! - [`approval_voting`](approval_voting::approval_voting): Implements an approval voting electoral
+//!   system where voters can back multiple candidates with the same stake.
 //!
 //! ### Terminology
 //!
@@ -90,6 +92,7 @@ mod mock;
 #[cfg(test)]
 mod tests;
 
+pub mod approval_voting;
 mod assignments;
 pub mod balancing;
 pub mod helpers;
@@ -100,6 +103,7 @@ pub mod pjr;
 pub mod reduce;
 pub mod traits;
 
+pub use approval_voting::*;
 pub use assignments::{Assignment, StakedAssignment};
 pub use balancing::*;
 pub use helpers::*;
diff --git a/substrate/primitives/npos-elections/src/phragmen.rs b/substrate/primitives/npos-elections/src/phragmen.rs
index c3578065f36..b7204ce1c34 100644
--- a/substrate/primitives/npos-elections/src/phragmen.rs
+++ b/substrate/primitives/npos-elections/src/phragmen.rs
@@ -57,7 +57,7 @@ const DEN: ExtendedBalance = ExtendedBalance::max_value();
 /// - The returning weight distribution is _normalized_, meaning that it is guaranteed that the sum
 ///   of the ratios in each voter's distribution sums up to exactly `P::one()`.
 ///
-/// This can only fail of the normalization fails. This can happen if for any of the resulting
+/// This can only fail if the normalization fails. This can happen if for any of the resulting
 /// assignments, `assignment.distribution.map(|p| p.deconstruct()).sum()` fails to fit inside
 /// `UpperOf<P>`. A user of this crate may statically assert that this can never happen and safely
 /// `expect` this to return `Ok`.
diff --git a/substrate/primitives/npos-elections/src/tests.rs b/substrate/primitives/npos-elections/src/tests.rs
index 72ae9a0222b..5fea4c25064 100644
--- a/substrate/primitives/npos-elections/src/tests.rs
+++ b/substrate/primitives/npos-elections/src/tests.rs
@@ -18,12 +18,57 @@
 //! Tests for npos-elections.
 
 use crate::{
-	balancing, helpers::*, mock::*, seq_phragmen, seq_phragmen_core, setup_inputs, to_support_map,
-	Assignment, BalancingConfig, ElectionResult, ExtendedBalance, StakedAssignment, Support, Voter,
+	approval_voting::*, balancing, helpers::*, mock::*, seq_phragmen, seq_phragmen_core,
+	setup_inputs, to_support_map, Assignment, BalancingConfig, ElectionResult, ExtendedBalance,
+	StakedAssignment, Support, Voter,
 };
 use sp_arithmetic::{PerU16, Perbill, Percent, Permill};
 use substrate_test_utils::assert_eq_uvec;
 
+#[test]
+fn approval_voting_works() {
+	let candidates = vec![1, 2, 3, 4];
+	let voters = vec![(10, vec![1, 2]), (20, vec![1, 2]), (30, vec![1, 2, 3]), (40, vec![4])];
+	let stake_of = create_stake_of(&[(10, 10), (20, 20), (30, 30), (40, 40)]);
+
+	let voters = voters
+		.iter()
+		.map(|(ref v, ref vs)| (*v, stake_of(v), vs.clone()))
+		.collect::<Vec<_>>();
+
+	let ElectionResult::<_, Perbill> { winners, assignments } =
+		approval_voting(3, candidates, voters).unwrap();
+
+	assert_eq_uvec!(winners, vec![(1, 60), (2, 60), (4, 40)]);
+	assert_eq_uvec!(
+		assignments,
+		vec![
+			Assignment {
+				who: 10u64,
+				distribution: vec![
+					(1, Perbill::from_percent(100)),
+					(2, Perbill::from_percent(100))
+				]
+			},
+			Assignment {
+				who: 20u64,
+				distribution: vec![
+					(1, Perbill::from_percent(100)),
+					(2, Perbill::from_percent(100))
+				]
+			},
+			Assignment {
+				who: 30u64,
+				distribution: vec![
+					(1, Perbill::from_percent(100)),
+					(2, Perbill::from_percent(100))
+				]
+			},
+			Assignment { who: 40u64, distribution: vec![(4, Perbill::from_percent(100))] },
+		]
+	);
+}
+
 #[test]
 fn float_phragmen_poc_works() {
 	let candidates = vec![1, 2, 3];
diff --git a/substrate/scripts/run_all_benchmarks.sh b/substrate/scripts/run_all_benchmarks.sh
index b632cb5c12f..818a5df7f6d 100755
--- a/substrate/scripts/run_all_benchmarks.sh
+++ b/substrate/scripts/run_all_benchmarks.sh
@@ -67,8 +67,6 @@ SUBSTRATE=./target/production/substrate
 
 # Manually exclude some pallets.
 EXCLUDED_PALLETS=(
-  # Helper pallets
-  "pallet_election_provider_support_benchmarking"
   # Pallets without automatic benchmarking
   "pallet_babe"
   "pallet_grandpa"
diff --git a/substrate/utils/frame/remote-externalities/Cargo.toml b/substrate/utils/frame/remote-externalities/Cargo.toml
index 8611ae4980f..e55b64efbdc 100644
--- a/substrate/utils/frame/remote-externalities/Cargo.toml
+++ b/substrate/utils/frame/remote-externalities/Cargo.toml
@@ -25,7 +25,7 @@ futures = "0.3"
 
 [dev-dependencies]
 frame-support = { version = "4.0.0-dev", path = "../../../frame/support" }
-pallet-elections-phragmen = { version = "5.0.0-dev", path = "../../../frame/elections-phragmen" }
+pallet-elections = { version = "5.0.0-dev", path = "../../../frame/elections" }
 tracing-subscriber = { version = "0.3.16", features = ["env-filter"] }
 
 [features]
-- 
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