Fix ss58 prefixes of Polkadot, Kusama and Westend used by relay (#1298)

* fix ss58 prefixes of Polkadot, Kusama and Westend

* fmt

bridges/relays/bin-substrate/src/chains/kusama.rs

@@ -81,7 +81,10 @@ impl CliChain for Kusama {
 	type MessagePayload = ();
 
 	fn ss58_format() -> u16 {
-		42
+		sp_core::crypto::Ss58AddressFormat::from(
+			sp_core::crypto::Ss58AddressFormatRegistry::KusamaAccount,
+		)
+		.into()
 	}
 
 	fn encode_message(

bridges/relays/bin-substrate/src/chains/polkadot.rs

@@ -81,7 +81,10 @@ impl CliChain for Polkadot {
 	type MessagePayload = ();
 
 	fn ss58_format() -> u16 {
-		42
+		sp_core::crypto::Ss58AddressFormat::from(
+			sp_core::crypto::Ss58AddressFormatRegistry::PolkadotAccount,
+		)
+		.into()
 	}
 
 	fn encode_message(

bridges/relays/bin-substrate/src/chains/westend.rs

@@ -28,7 +28,10 @@ impl CliChain for Westend {
 	type MessagePayload = ();
 
 	fn ss58_format() -> u16 {
-		42
+		sp_core::crypto::Ss58AddressFormat::from(
+			sp_core::crypto::Ss58AddressFormatRegistry::SubstrateAccount,
+		)
+		.into()
 	}
 
 	fn encode_message(