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author | obscuren <geffobscura@gmail.com> | 2014-02-15 06:56:09 +0800 |
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committer | obscuren <geffobscura@gmail.com> | 2014-02-15 06:56:09 +0800 |
commit | f6d1bfe45bf3709d7bad40bf563b5c09228622e3 (patch) | |
tree | df48311a5a494c66c74dcd51f1056cc699f01507 /ethchain/transaction.go | |
parent | c2fb9f06ad018d01ce335c82b3542de16045a32d (diff) | |
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The great merge
Diffstat (limited to 'ethchain/transaction.go')
-rw-r--r-- | ethchain/transaction.go | 157 |
1 files changed, 157 insertions, 0 deletions
diff --git a/ethchain/transaction.go b/ethchain/transaction.go new file mode 100644 index 000000000..1a9258201 --- /dev/null +++ b/ethchain/transaction.go @@ -0,0 +1,157 @@ +package ethchain + +import ( + "github.com/ethereum/eth-go/ethutil" + "github.com/obscuren/secp256k1-go" + "math/big" +) + +type Transaction struct { + Nonce uint64 + Recipient []byte + Value *big.Int + Data []string + Memory []int + v byte + r, s []byte +} + +func NewTransaction(to []byte, value *big.Int, data []string) *Transaction { + tx := Transaction{Recipient: to, Value: value} + tx.Nonce = 0 + + // Serialize the data + tx.Data = make([]string, len(data)) + for i, val := range data { + instr, err := ethutil.CompileInstr(val) + if err != nil { + //fmt.Printf("compile error:%d %v\n", i+1, err) + } + + tx.Data[i] = instr + } + + return &tx +} + +func NewTransactionFromData(data []byte) *Transaction { + tx := &Transaction{} + tx.RlpDecode(data) + + return tx +} + +func NewTransactionFromValue(val *ethutil.Value) *Transaction { + tx := &Transaction{} + tx.RlpValueDecode(val) + + return tx +} + +func (tx *Transaction) Hash() []byte { + data := make([]interface{}, len(tx.Data)) + for i, val := range tx.Data { + data[i] = val + } + + preEnc := []interface{}{ + tx.Nonce, + tx.Recipient, + tx.Value, + data, + } + + return ethutil.Sha3Bin(ethutil.Encode(preEnc)) +} + +func (tx *Transaction) IsContract() bool { + return len(tx.Recipient) == 0 +} + +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() + + // If we don't make a copy we will overwrite the existing underlying array + dst := make([]byte, len(tx.r)) + copy(dst, tx.r) + + sig := append(dst, tx.s...) + sig = append(sig, tx.v-27) + + 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 pubkey[0] != 4 { + return nil + } + + return ethutil.Sha3Bin(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{} { + // Prepare the transaction for serialization + return []interface{}{ + tx.Nonce, + tx.Recipient, + tx.Value, + ethutil.NewSliceValue(tx.Data).Slice(), + tx.v, + tx.r, + tx.s, + } +} + +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.Recipient = decoder.Get(1).Bytes() + tx.Value = decoder.Get(2).BigInt() + + d := decoder.Get(3) + tx.Data = make([]string, d.Len()) + for i := 0; i < d.Len(); i++ { + tx.Data[i] = d.Get(i).Str() + } + + // TODO something going wrong here + tx.v = byte(decoder.Get(4).Uint()) + tx.r = decoder.Get(5).Bytes() + tx.s = decoder.Get(6).Bytes() +} |