Polkadot <> Kusama Bridge
Our bridge connects two parachains - Kusama Bridge Hub and Polkadot Bridge Hub. Messages that
are sent over bridge have XCM format and we are using existing architecture to dispatch them.
Since both Polkadot, Kusama and their parachains already have means to exchange XCM messages
within the same consensus system (HRMP, VMP, ...), it means that we are able to connect all those
chains with our bridge.
In our architecture, the lane that is used to relay messages over the bridge is determined by
the XCM source and destinations. So e.g. bridge between AssetHubPolkadot and AssetHubKusama (and opposite direction)
will use the lane 00000000, bridge between some other Polkadot Parachain and some other Kusama Parachain
will use the lane 00000001 and so on.
flowchart LR
subgraph Polkadot Consensus
polkadot(((Polkadot)))
statemint(((Statemint)))
polkadot_bh(((Polkadot Bridge Hub)))
polkadot---statemint
polkadot---polkadot_bh
statemint-->|Send Message Using HRMP|polkadot_bh
polkadot_bh-->|Send Message Using HRMP|statemint
statemint-->|Dispatch the Message|statemint
end
subgraph Kusama Consensus
kusama_bh(((Kusama Bridge Hub)))
statemine(((Statemine)))
kusama(((Kusama)))
kusama---statemine
kusama---kusama_bh
kusama_bh-->|Send Message Using HRMP|statemine
statemine-->|Dispatch the Message|statemine
statemine-->|Send Message Using HRMP|kusama_bh
end
polkadot_bh<===>|Message is relayed to the Bridged Chain using lane 00000000|kusama_bh
linkStyle 2 stroke:red
linkStyle 7 stroke:red
linkStyle 8 stroke:red
linkStyle 3 stroke:green
linkStyle 4 stroke:green
linkStyle 9 stroke:green