Initial GRANDPA integration (#866)
* implement grandpa client * consensus gossip with arbitrary topics * defer GRANDPA messages until referenced blocks imported * set up communication for voter in a transparent way * instantiate GRANDPA voter * keep last round state on disk * switch back to crates.io finality-grandpa * update cargo.lock * use new `collect_garbage` API * update sync test framework and make public * test that observers can observe * fix warning * use more idiomatic predicate for collecting garbage in gossip * kill spaces * fix date
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- substrate/Cargo.lock 91 additions, 61 deletionssubstrate/Cargo.lock
- substrate/Cargo.toml 1 addition, 0 deletionssubstrate/Cargo.toml
- substrate/core/finality-grandpa/Cargo.toml 22 additions, 0 deletionssubstrate/core/finality-grandpa/Cargo.toml
- substrate/core/finality-grandpa/src/lib.rs 767 additions, 0 deletionssubstrate/core/finality-grandpa/src/lib.rs
- substrate/core/network/Cargo.toml 9 additions, 1 deletionsubstrate/core/network/Cargo.toml
- substrate/core/network/src/consensus_gossip.rs 41 additions, 39 deletionssubstrate/core/network/src/consensus_gossip.rs
- substrate/core/network/src/import_queue.rs 37 additions, 32 deletionssubstrate/core/network/src/import_queue.rs
- substrate/core/network/src/lib.rs 10 additions, 4 deletionssubstrate/core/network/src/lib.rs
- substrate/core/network/src/test/mod.rs 100 additions, 26 deletionssubstrate/core/network/src/test/mod.rs
- substrate/node/network/src/lib.rs 3 additions, 2 deletionssubstrate/node/network/src/lib.rs
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