IBC v2 Transfer

/ Payload contains the source and destination ports and payload for the application (version, encoding, raw bytes)

type Payload struct {
	/ specifies the source port of the packet, e.g. transfer
	SourcePort string `protobuf:"bytes,1,opt,name=source_port,json=sourcePort,proto3" json:"source_port,omitempty"`
	/ specifies the destination port of the packet, e.g. trasnfer
	DestinationPort string `protobuf:"bytes,2,opt,name=destination_port,json=destinationPort,proto3" json:"destination_port,omitempty"`
	/ version of the specified application
	Version string `protobuf:"bytes,3,opt,name=version,proto3" json:"version,omitempty"`
	/ the encoding used for the provided value, for transfer this could be JSON, protobuf or ABI
	Encoding string `protobuf:"bytes,4,opt,name=encoding,proto3" json:"encoding,omitempty"`
	/ the raw bytes for the payload.
	Value []byte `protobuf:"bytes,5,opt,name=value,proto3" json:"value,omitempty"`
}

/ FungibleTokenPacketData defines a struct for the packet payload
/ See FungibleTokenPacketData spec:
/ https://github.com/cosmos/ibc/tree/master/spec/app/ics-020-fungible-token-transfer#data-structures
type FungibleTokenPacketData struct {
	/ the token denomination to be transferred
	Denom string `protobuf:"bytes,1,opt,name=denom,proto3" json:"denom,omitempty"`
	/ the token amount to be transferred
	Amount string `protobuf:"bytes,2,opt,name=amount,proto3" json:"amount,omitempty"`
	/ the sender address
	Sender string `protobuf:"bytes,3,opt,name=sender,proto3" json:"sender,omitempty"`
	/ the recipient address on the destination chain
	Receiver string `protobuf:"bytes,4,opt,name=receiver,proto3" json:"receiver,omitempty"`
	/ optional memo
	Memo string `protobuf:"bytes,5,opt,name=memo,proto3" json:"memo,omitempty"`
}