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author | obscuren <geffobscura@gmail.com> | 2014-12-04 17:28:02 +0800 |
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committer | obscuren <geffobscura@gmail.com> | 2014-12-04 17:28:02 +0800 |
commit | 9008b155d3c8d2a32c4c8945f1174243d48d4e90 (patch) | |
tree | a55140b7d4802a0db14cbc265b8ca21d44d6f10a /core/types/transaction.go | |
parent | b6cb5272de96185b424d5c6c4a817d99f536d29b (diff) | |
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Renamed `chain` => `core`
Diffstat (limited to 'core/types/transaction.go')
-rw-r--r-- | core/types/transaction.go | 225 |
1 files changed, 225 insertions, 0 deletions
diff --git a/core/types/transaction.go b/core/types/transaction.go new file mode 100644 index 000000000..efc90b6f2 --- /dev/null +++ b/core/types/transaction.go @@ -0,0 +1,225 @@ +package types + +import ( + "fmt" + "math/big" + + "github.com/ethereum/go-ethereum/crypto" + "github.com/ethereum/go-ethereum/ethutil" + "github.com/ethereum/go-ethereum/state" + "github.com/obscuren/secp256k1-go" +) + +var ContractAddr = []byte{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} + +func IsContractAddr(addr []byte) bool { + return len(addr) == 0 + //return bytes.Compare(addr, ContractAddr) == 0 +} + +type Transaction struct { + Nonce uint64 + Recipient []byte + Value *big.Int + Gas *big.Int + GasPrice *big.Int + Data []byte + v byte + r, s []byte + + // Indicates whether this tx is a contract creation transaction + contractCreation bool +} + +func NewContractCreationTx(value, gas, gasPrice *big.Int, script []byte) *Transaction { + return &Transaction{Recipient: nil, Value: value, Gas: gas, GasPrice: gasPrice, Data: script, contractCreation: true} +} + +func NewTransactionMessage(to []byte, value, gas, gasPrice *big.Int, data []byte) *Transaction { + return &Transaction{Recipient: to, Value: value, GasPrice: gasPrice, Gas: gas, Data: data, contractCreation: IsContractAddr(to)} +} + +func NewTransactionFromBytes(data []byte) *Transaction { + tx := &Transaction{} + tx.RlpDecode(data) + + return tx +} + +func NewTransactionFromValue(val *ethutil.Value) *Transaction { + tx := &Transaction{} + tx.RlpValueDecode(val) + + return tx +} + +func (self *Transaction) GasValue() *big.Int { + return new(big.Int).Mul(self.Gas, self.GasPrice) +} + +func (self *Transaction) TotalValue() *big.Int { + v := self.GasValue() + return v.Add(v, self.Value) +} + +func (tx *Transaction) Hash() []byte { + data := []interface{}{tx.Nonce, tx.GasPrice, tx.Gas, tx.Recipient, tx.Value, tx.Data} + + return crypto.Sha3(ethutil.NewValue(data).Encode()) +} + +func (tx *Transaction) CreatesContract() bool { + return tx.contractCreation +} + +/* Deprecated */ +func (tx *Transaction) IsContract() bool { + return tx.CreatesContract() +} + +func (tx *Transaction) CreationAddress(state *state.State) []byte { + // Generate a new address + return crypto.Sha3(ethutil.NewValue([]interface{}{tx.Sender(), tx.Nonce}).Encode())[12:] +} + +func (tx *Transaction) Curve() (v byte, r []byte, s []byte) { + v = tx.v + r = ethutil.LeftPadBytes(tx.r, 32) + s = ethutil.LeftPadBytes(tx.s, 32) + + return +} + +func (tx *Transaction) Signature(key []byte) []byte { + hash := tx.Hash() + + sig, _ := secp256k1.Sign(hash, key) + + return sig +} + +func (tx *Transaction) PublicKey() []byte { + hash := tx.Hash() + + v, r, s := tx.Curve() + + sig := append(r, s...) + sig = append(sig, v-27) + + pubkey := crypto.Ecrecover(append(hash, sig...)) + //pubkey, _ := secp256k1.RecoverPubkey(hash, sig) + + return pubkey +} + +func (tx *Transaction) Sender() []byte { + pubkey := tx.PublicKey() + + // Validate the returned key. + // Return nil if public key isn't in full format + if len(pubkey) != 0 && pubkey[0] != 4 { + return nil + } + + return crypto.Sha3(pubkey[1:])[12:] +} + +func (tx *Transaction) Sign(privk []byte) error { + + sig := tx.Signature(privk) + + tx.r = sig[:32] + tx.s = sig[32:64] + tx.v = sig[64] + 27 + + return nil +} + +func (tx *Transaction) RlpData() interface{} { + data := []interface{}{tx.Nonce, tx.GasPrice, tx.Gas, tx.Recipient, tx.Value, tx.Data} + + // TODO Remove prefixing zero's + + return append(data, tx.v, new(big.Int).SetBytes(tx.r).Bytes(), new(big.Int).SetBytes(tx.s).Bytes()) +} + +func (tx *Transaction) RlpValue() *ethutil.Value { + return ethutil.NewValue(tx.RlpData()) +} + +func (tx *Transaction) RlpEncode() []byte { + return tx.RlpValue().Encode() +} + +func (tx *Transaction) RlpDecode(data []byte) { + tx.RlpValueDecode(ethutil.NewValueFromBytes(data)) +} + +func (tx *Transaction) RlpValueDecode(decoder *ethutil.Value) { + tx.Nonce = decoder.Get(0).Uint() + tx.GasPrice = decoder.Get(1).BigInt() + tx.Gas = decoder.Get(2).BigInt() + tx.Recipient = decoder.Get(3).Bytes() + tx.Value = decoder.Get(4).BigInt() + tx.Data = decoder.Get(5).Bytes() + tx.v = byte(decoder.Get(6).Uint()) + + tx.r = decoder.Get(7).Bytes() + tx.s = decoder.Get(8).Bytes() + + if IsContractAddr(tx.Recipient) { + tx.contractCreation = true + } +} + +func (tx *Transaction) String() string { + return fmt.Sprintf(` + TX(%x) + Contract: %v + From: %x + To: %x + Nonce: %v + GasPrice: %v + Gas: %v + Value: %v + Data: 0x%x + V: 0x%x + R: 0x%x + S: 0x%x + `, + tx.Hash(), + len(tx.Recipient) == 0, + tx.Sender(), + tx.Recipient, + tx.Nonce, + tx.GasPrice, + tx.Gas, + tx.Value, + tx.Data, + tx.v, + tx.r, + tx.s) +} + +// Transaction slice type for basic sorting +type Transactions []*Transaction + +func (self Transactions) RlpData() interface{} { + // Marshal the transactions of this block + enc := make([]interface{}, len(self)) + for i, tx := range self { + // Cast it to a string (safe) + enc[i] = tx.RlpData() + } + + return enc +} +func (s Transactions) Len() int { return len(s) } +func (s Transactions) Swap(i, j int) { s[i], s[j] = s[j], s[i] } +func (s Transactions) GetRlp(i int) []byte { return ethutil.Rlp(s[i]) } + +type TxByNonce struct{ Transactions } + +func (s TxByNonce) Less(i, j int) bool { + return s.Transactions[i].Nonce < s.Transactions[j].Nonce +} |