AddSignature adds a signature to the multisig, at the corresponding index.

AddSignatureFromPubKey adds a signature to the multisig, at the index in keys corresponding to the provided pubkey.

NewMultisig returns a new MultiSignatureData.

AminoMultisignature is used to represent amino multi-signatures for StdTx's.

PubKey defines a type which supports multi-signature verification via MultiSignatureData which supports multiple SignMode's.

GetSignBytesFunc defines a function type which returns sign bytes for a given SignMode or an error.