Transfer transaction type.
Transfer(
accountId,
String toAddress,
int fromSubAccountId,
int toSubAccountId,
int token,
String fee,
String amount,
int nonce,
int? ts,
)
String getEthSignMsg(String tokenSymbol)
Get the Ethereum sign message
void sign(ZkLinkSigner zkLinkSigner)
Sign transaction with given ZkLinkSigner
String toJson()
Get the json str of Transfer