Example #1
0
func Disassemble(script []byte) (asm []string) {
	pc := new(big.Int)
	for {
		if pc.Cmp(big.NewInt(int64(len(script)))) >= 0 {
			return
		}

		// Get the memory location of pc
		val := script[pc.Int64()]
		// Get the opcode (it must be an opcode!)
		op := vm.OpCode(val)

		asm = append(asm, fmt.Sprintf("%04v: %v", pc, op))

		switch op {
		case vm.PUSH1, vm.PUSH2, vm.PUSH3, vm.PUSH4, vm.PUSH5, vm.PUSH6, vm.PUSH7, vm.PUSH8,
			vm.PUSH9, vm.PUSH10, vm.PUSH11, vm.PUSH12, vm.PUSH13, vm.PUSH14, vm.PUSH15,
			vm.PUSH16, vm.PUSH17, vm.PUSH18, vm.PUSH19, vm.PUSH20, vm.PUSH21, vm.PUSH22,
			vm.PUSH23, vm.PUSH24, vm.PUSH25, vm.PUSH26, vm.PUSH27, vm.PUSH28, vm.PUSH29,
			vm.PUSH30, vm.PUSH31, vm.PUSH32:
			pc.Add(pc, common.Big1)
			a := int64(op) - int64(vm.PUSH1) + 1
			if int(pc.Int64()+a) > len(script) {
				return
			}

			data := script[pc.Int64() : pc.Int64()+a]
			if len(data) == 0 {
				data = []byte{0}
			}
			asm = append(asm, fmt.Sprintf("%04v: 0x%x", pc, data))

			pc.Add(pc, big.NewInt(a-1))
		}

		pc.Add(pc, common.Big1)
	}

	return asm
}
Example #2
0
func main() {
	code, err := ioutil.ReadAll(os.Stdin)
	if err != nil {
		fmt.Println(err)
		os.Exit(1)
	}
	code = common.Hex2Bytes(string(code[:len(code)-1]))
	fmt.Printf("%x\n", code)

	for pc := uint64(0); pc < uint64(len(code)); pc++ {
		op := vm.OpCode(code[pc])
		fmt.Printf("%-5d  %v", pc, op)

		switch op {
		case vm.PUSH1, vm.PUSH2, vm.PUSH3, vm.PUSH4, vm.PUSH5, vm.PUSH6, vm.PUSH7, vm.PUSH8, vm.PUSH9, vm.PUSH10, vm.PUSH11, vm.PUSH12, vm.PUSH13, vm.PUSH14, vm.PUSH15, vm.PUSH16, vm.PUSH17, vm.PUSH18, vm.PUSH19, vm.PUSH20, vm.PUSH21, vm.PUSH22, vm.PUSH23, vm.PUSH24, vm.PUSH25, vm.PUSH26, vm.PUSH27, vm.PUSH28, vm.PUSH29, vm.PUSH30, vm.PUSH31, vm.PUSH32:
			a := uint64(op) - uint64(vm.PUSH1) + 1
			fmt.Printf("  => %x", code[pc+1:pc+1+a])

			pc += a
		}
		fmt.Println()
	}
}