Optionalclient_Optionalconnection_Optionalconsensus_Optionalcounterparty_Optionalproof_proof of client state included in message
Optionalproof_proof of client consensus state
Optionalproof_Optionalproof_proof of the initialization the connection on Chain B: UNITIALIZED -> TRYOPEN
OptionalsignerOptionalversion
MsgConnectionOpenAck defines a msg sent by a Relayer to Chain A to acknowledge the change of connection state to TRYOPEN on Chain B.