/
transaction_marshalling.go
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/
transaction_marshalling.go
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// (c) 2019-2021, Ava Labs, Inc.
//
// This file is a derived work, based on the go-ethereum library whose original
// notices appear below.
//
// It is distributed under a license compatible with the licensing terms of the
// original code from which it is derived.
//
// Much love to the original authors for their work.
// **********
// Copyright 2019 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package types
import (
"encoding/json"
"errors"
"math/big"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/common/hexutil"
)
// txJSON is the JSON representation of transactions.
type txJSON struct {
Type hexutil.Uint64 `json:"type"`
// Common transaction fields:
Nonce *hexutil.Uint64 `json:"nonce"`
GasPrice *hexutil.Big `json:"gasPrice"`
Gas *hexutil.Uint64 `json:"gas"`
Value *hexutil.Big `json:"value"`
Data *hexutil.Bytes `json:"input"`
V *hexutil.Big `json:"v"`
R *hexutil.Big `json:"r"`
S *hexutil.Big `json:"s"`
To *common.Address `json:"to"`
// Access list transaction fields:
ChainID *hexutil.Big `json:"chainId,omitempty"`
AccessList *AccessList `json:"accessList,omitempty"`
// Only used for encoding:
Hash common.Hash `json:"hash"`
}
// MarshalJSON marshals as JSON with a hash.
func (t *Transaction) MarshalJSON() ([]byte, error) {
var enc txJSON
// These are set for all tx types.
enc.Hash = t.Hash()
enc.Type = hexutil.Uint64(t.Type())
// Other fields are set conditionally depending on tx type.
switch tx := t.inner.(type) {
case *LegacyTx:
enc.Nonce = (*hexutil.Uint64)(&tx.Nonce)
enc.Gas = (*hexutil.Uint64)(&tx.Gas)
enc.GasPrice = (*hexutil.Big)(tx.GasPrice)
enc.Value = (*hexutil.Big)(tx.Value)
enc.Data = (*hexutil.Bytes)(&tx.Data)
enc.To = t.To()
enc.V = (*hexutil.Big)(tx.V)
enc.R = (*hexutil.Big)(tx.R)
enc.S = (*hexutil.Big)(tx.S)
case *AccessListTx:
enc.ChainID = (*hexutil.Big)(tx.ChainID)
enc.AccessList = &tx.AccessList
enc.Nonce = (*hexutil.Uint64)(&tx.Nonce)
enc.Gas = (*hexutil.Uint64)(&tx.Gas)
enc.GasPrice = (*hexutil.Big)(tx.GasPrice)
enc.Value = (*hexutil.Big)(tx.Value)
enc.Data = (*hexutil.Bytes)(&tx.Data)
enc.To = t.To()
enc.V = (*hexutil.Big)(tx.V)
enc.R = (*hexutil.Big)(tx.R)
enc.S = (*hexutil.Big)(tx.S)
}
return json.Marshal(&enc)
}
// UnmarshalJSON unmarshals from JSON.
func (t *Transaction) UnmarshalJSON(input []byte) error {
var dec txJSON
if err := json.Unmarshal(input, &dec); err != nil {
return err
}
// Decode / verify fields according to transaction type.
var inner TxData
switch dec.Type {
case LegacyTxType:
var itx LegacyTx
inner = &itx
if dec.To != nil {
itx.To = dec.To
}
if dec.Nonce == nil {
return errors.New("missing required field 'nonce' in transaction")
}
itx.Nonce = uint64(*dec.Nonce)
if dec.GasPrice == nil {
return errors.New("missing required field 'gasPrice' in transaction")
}
itx.GasPrice = (*big.Int)(dec.GasPrice)
if dec.Gas == nil {
return errors.New("missing required field 'gas' in transaction")
}
itx.Gas = uint64(*dec.Gas)
if dec.Value == nil {
return errors.New("missing required field 'value' in transaction")
}
itx.Value = (*big.Int)(dec.Value)
if dec.Data == nil {
return errors.New("missing required field 'input' in transaction")
}
itx.Data = *dec.Data
if dec.V == nil {
return errors.New("missing required field 'v' in transaction")
}
itx.V = (*big.Int)(dec.V)
if dec.R == nil {
return errors.New("missing required field 'r' in transaction")
}
itx.R = (*big.Int)(dec.R)
if dec.S == nil {
return errors.New("missing required field 's' in transaction")
}
itx.S = (*big.Int)(dec.S)
withSignature := itx.V.Sign() != 0 || itx.R.Sign() != 0 || itx.S.Sign() != 0
if withSignature {
if err := sanityCheckSignature(itx.V, itx.R, itx.S, true); err != nil {
return err
}
}
case AccessListTxType:
var itx AccessListTx
inner = &itx
// Access list is optional for now.
if dec.AccessList != nil {
itx.AccessList = *dec.AccessList
}
if dec.ChainID == nil {
return errors.New("missing required field 'chainId' in transaction")
}
itx.ChainID = (*big.Int)(dec.ChainID)
if dec.To != nil {
itx.To = dec.To
}
if dec.Nonce == nil {
return errors.New("missing required field 'nonce' in transaction")
}
itx.Nonce = uint64(*dec.Nonce)
if dec.GasPrice == nil {
return errors.New("missing required field 'gasPrice' in transaction")
}
itx.GasPrice = (*big.Int)(dec.GasPrice)
if dec.Gas == nil {
return errors.New("missing required field 'gas' in transaction")
}
itx.Gas = uint64(*dec.Gas)
if dec.Value == nil {
return errors.New("missing required field 'value' in transaction")
}
itx.Value = (*big.Int)(dec.Value)
if dec.Data == nil {
return errors.New("missing required field 'input' in transaction")
}
itx.Data = *dec.Data
if dec.V == nil {
return errors.New("missing required field 'v' in transaction")
}
itx.V = (*big.Int)(dec.V)
if dec.R == nil {
return errors.New("missing required field 'r' in transaction")
}
itx.R = (*big.Int)(dec.R)
if dec.S == nil {
return errors.New("missing required field 's' in transaction")
}
itx.S = (*big.Int)(dec.S)
withSignature := itx.V.Sign() != 0 || itx.R.Sign() != 0 || itx.S.Sign() != 0
if withSignature {
if err := sanityCheckSignature(itx.V, itx.R, itx.S, false); err != nil {
return err
}
}
default:
return ErrTxTypeNotSupported
}
// Now set the inner transaction.
t.setDecoded(inner, 0)
// TODO: check hash here?
return nil
}