s2s bridge abstraction, and feemarket relay strategy

bridges/pangolin-pangolinparachain/bridge/Cargo.toml

@@ -64,7 +64,7 @@ relay-utils                     = { git = "https://github.com/darwinia-network/d
 substrate-relay-helper          = { git = "https://github.com/darwinia-network/darwinia-bridges-substrate.git", branch = "darwinia-v0.12.2" }
 subxt                           = { git = "https://github.com/darwinia-network/subxt.git", branch = "darwinia-v0.12.2" }
 ## component
-client-pangolin           = { path = "../../../frame/assistants/client-pangolin", features = ["s2s"] }
+client-pangolin           = { path = "../../../frame/assistants/client-pangolin", features = ["bridge-s2s"] }
 client-pangolin-parachain = { path = "../../../frame/assistants/client-pangolin-parachain" }
 client-rococo             = { path = "../../../frame/assistants/client-rococo" }
 component-subscan         = { path = "../../../frame/components/subscan" }