signer

type Signer interface {
	// The signer ether address
	Addresss() string
	// SignTypedData implement eip712 sign ...
	SignTypedData(typedData *TypedData) ([]byte, error)
	// SignTransaction sign ether transaction
	SignTransaction(tx *Transaction) error
}

type Transaction struct {
	AccountNonce uint64    `json:"nonce"    gencodec:"required"`
	Price        *big.Int  `json:"gasPrice" gencodec:"required"`
	GasLimit     *big.Int  `json:"gas"      gencodec:"required"`
	Recipient    *[20]byte `json:"to"       rlp:"nil"` // nil means contract creation
	Amount       *big.Int  `json:"value"    gencodec:"required"`
	Payload      []byte    `json:"input"    gencodec:"required"`
	V            *big.Int  `json:"v" gencodec:"required"`
	R            *big.Int  `json:"r" gencodec:"required"`
	S            *big.Int  `json:"s" gencodec:"required"`
}

type TypedData eip712.TypedData