//TODO: test
func DecodeTx(tx []byte) (*Tx, []byte) {
//log.Printf("DecodeTx - %X", tx)
//4+1+41+1+8+4=59
if len(tx) < 4+1+41+1+8+4 {
return nil, tx
}
answer := new(Tx)
/*
Version [4]byte
TxInCount mymath.VarInt
TxIn []*TxIn//[]TxIn
TxOutCount mymath.VarInt
TxOut []*TxOut//[]TxOut
LockTime [4]byte
*/
copy(answer.Version[:], tx[0:4])
var tmpbytes []byte
//log.Printf("Before ins: %X", tx[4:])
answer.TxInCount, tmpbytes = mymath.DecodeVarIntGiveRest(tx[4:])
answer.TxIn, tmpbytes = DecodeMultipleTxIns(tmpbytes, int(answer.TxInCount))
//log.Printf("Before outs: %X", tmpbytes)
answer.TxOutCount, tmpbytes = mymath.DecodeVarIntGiveRest(tmpbytes)
answer.TxOut, tmpbytes = DecodeMultipleTxOuts(tmpbytes, int(answer.TxOutCount))
//log.Printf("After outs: %X", tmpbytes)
if len(tmpbytes) < 4 {
return nil, tx
}
copy(answer.LockTime[:], tmpbytes[0:4])
return answer, tmpbytes[4:]
}
//TODO: test
func DecodeTxOut(b []byte) (*TxOut, []byte) {
if len(b) < 8+1 {
return nil, b
}
/*
Value [8]byte
PkScriptLength mymath.VarInt
PkScript []byte//uchar[]
*/
answer := new(TxOut)
copy(answer.Value[:], b[0:8])
var tmpbytes []byte
answer.PkScriptLength, tmpbytes = mymath.DecodeVarIntGiveRest(b[8:])
if len(tmpbytes) < int(answer.PkScriptLength) {
log.Printf("b - %X", b)
log.Printf("len(tmpbytes)=%d", len(tmpbytes))
log.Printf("PkScriptLength=%d", answer.PkScriptLength)
return nil, b
}
answer.PkScript = make([]byte, answer.PkScriptLength)
copy(answer.PkScript, tmpbytes[0:answer.PkScriptLength])
//log.Printf("PkScript\n%X", answer.PkScript)
return answer, tmpbytes[answer.PkScriptLength:]
}
//TODO: do
func DecodeBlock(blck []byte) *Block {
blk := new(Block)
//log.Print("DecodeBlock")
if len(blck) < 4+32+32+4+4+4 {
return nil
}
copy(blk.Version[:], blck[0:4])
copy(blk.PrevBlock[:], blck[4:4+32])
copy(blk.MerkleRoot[:], blck[4+32:4+32+32])
copy(blk.Timestamp[:], blck[4+32+32:4+32+32+4])
copy(blk.Bits[:], blck[4+32+32+4:4+32+32+4+4])
copy(blk.Nonce[:], blck[4+32+32+4+4:4+32+32+4+4+4])
/*for i:=0;i<4;i++{
blk.Version[i]=block[i]
}
for i:=0;i<32;i++{
blk.PrevBlock[i]=block[4+i]
}
for i:=0;i<32;i++{
blk.MerkleRoot[i]=block[4+32+i]
}
for i:=0;i<4;i++{
blk.Timestamp[i]=block[4+32+32+i]
}
for i:=0;i<4;i++{
blk.Bits[i]=block[4+32+32+4+i]
}
for i:=0;i<4;i++{
blk.Nonce[i]=block[4+32+32+4+4+i]
}*/
//4+32+32+4+4+4=80
var remainingBits []byte
blk.TxnCount, remainingBits = mymath.DecodeVarIntGiveRest(blck[80:])
//log.Printf("decode block remaining bits - %X", remainingBits)
blk.Txns, remainingBits = DecodeMultipleTxs(remainingBits, int(blk.TxnCount))
//log.Printf("decode block remaining bits 2 - %X", remainingBits)
return blk
}
//TODO: test
func DecodeTxIn(b []byte) (*TxIn, []byte) {
if len(b) < 36+1+4 {
return nil, b
}
//log.Printf("txin b - %X", b)
answer := new(TxIn)
answer.PreviousOutput.Hash = NewHash(b[0:32])
copy(answer.PreviousOutput.Index[:], b[32:36])
var tmpbytes []byte
answer.ScriptLength, tmpbytes = mymath.DecodeVarIntGiveRest(b[36:])
if len(tmpbytes) < int(answer.ScriptLength)+4 {
return nil, b
}
answer.SignatureScript = tmpbytes[0:answer.ScriptLength]
copy(answer.Sequence[:], tmpbytes[answer.ScriptLength:answer.ScriptLength+4])
//log.Printf("txin bytes - %X", tmpbytes[answer.ScriptLength+4:])
return answer, tmpbytes[answer.ScriptLength+4:]
}