60 lines
1.0 KiB
Go
60 lines
1.0 KiB
Go
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package ethchain
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import (
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"fmt"
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"github.com/ethereum/eth-go/ethutil"
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"math/big"
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)
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func Disassemble(script []byte) (asm []string) {
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pc := new(big.Int)
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for {
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if pc.Cmp(big.NewInt(int64(len(script)))) >= 0 {
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return
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}
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// Get the memory location of pc
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val := script[pc.Int64()]
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// Get the opcode (it must be an opcode!)
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op := OpCode(val)
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asm = append(asm, fmt.Sprintf("%v", op))
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switch op {
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case oPUSH: // Push PC+1 on to the stack
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pc.Add(pc, ethutil.Big1)
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data := script[pc.Int64() : pc.Int64()+32]
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val := ethutil.BigD(data)
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var b []byte
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if val.Int64() == 0 {
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b = []byte{0}
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} else {
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b = val.Bytes()
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}
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asm = append(asm, fmt.Sprintf("0x%x", b))
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pc.Add(pc, big.NewInt(31))
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case oPUSH20:
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pc.Add(pc, ethutil.Big1)
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data := script[pc.Int64() : pc.Int64()+20]
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val := ethutil.BigD(data)
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var b []byte
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if val.Int64() == 0 {
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b = []byte{0}
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} else {
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b = val.Bytes()
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}
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asm = append(asm, fmt.Sprintf("0x%x", b))
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pc.Add(pc, big.NewInt(19))
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}
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pc.Add(pc, ethutil.Big1)
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}
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return
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}
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