5127ec10cb
Refactored the abi package parsing and type handling. Relying mostly on
package reflect as opposed to most of our own type reflection. Our own
type reflection is still used however for cases such as Bytes and
FixedBytes (abi: bytes•).
This also inclused several fixes for slice handling of arbitrary and
fixed size for all supported types.
This also further removes implicit type casting such as assigning,
for example `[2]T{} = []T{1}` will fail, however `[2]T{} == []T{1, 2}`
(notice assigning *slice* to fixed size *array*). Assigning arrays to
slices will always succeed if they are of the same element type.
Incidentally also fixes #2379
957 lines
29 KiB
Go
957 lines
29 KiB
Go
// Copyright 2015 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package abi
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import (
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"bytes"
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"fmt"
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"log"
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"math/big"
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"reflect"
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"strings"
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"testing"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/crypto"
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)
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// formatSilceOutput add padding to the value and adds a size
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func formatSliceOutput(v ...[]byte) []byte {
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off := common.LeftPadBytes(big.NewInt(int64(len(v))).Bytes(), 32)
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output := append(off, make([]byte, 0, len(v)*32)...)
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for _, value := range v {
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output = append(output, common.LeftPadBytes(value, 32)...)
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}
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return output
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}
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// quick helper padding
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func pad(input []byte, size int, left bool) []byte {
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if left {
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return common.LeftPadBytes(input, size)
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}
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return common.RightPadBytes(input, size)
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}
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func TestTypeCheck(t *testing.T) {
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for i, test := range []struct {
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typ string
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input interface{}
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err error
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}{
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{"uint", big.NewInt(1), nil},
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{"int", big.NewInt(1), nil},
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{"uint30", big.NewInt(1), nil},
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{"uint30", uint8(1), varErr(reflect.Ptr, reflect.Uint8)},
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{"uint16", uint16(1), nil},
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{"uint16", uint8(1), varErr(reflect.Uint16, reflect.Uint8)},
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{"uint16[]", []uint16{1, 2, 3}, nil},
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{"uint16[]", [3]uint16{1, 2, 3}, nil},
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{"uint16[]", []uint32{1, 2, 3}, typeErr(formatSliceString(reflect.Uint16, -1), formatSliceString(reflect.Uint32, -1))},
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{"uint16[3]", [3]uint32{1, 2, 3}, typeErr(formatSliceString(reflect.Uint16, 3), formatSliceString(reflect.Uint32, 3))},
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{"uint16[3]", [4]uint16{1, 2, 3}, typeErr(formatSliceString(reflect.Uint16, 3), formatSliceString(reflect.Uint16, 4))},
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{"uint16[3]", []uint16{1, 2, 3}, nil},
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{"uint16[3]", []uint16{1, 2, 3, 4}, typeErr(formatSliceString(reflect.Uint16, 3), formatSliceString(reflect.Uint16, 4))},
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{"address[]", []common.Address{common.Address{1}}, nil},
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{"address[1]", []common.Address{common.Address{1}}, nil},
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{"address[1]", [1]common.Address{common.Address{1}}, nil},
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{"address[2]", [1]common.Address{common.Address{1}}, typeErr(formatSliceString(reflect.Array, 2), formatSliceString(reflect.Array, 1))},
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{"bytes32", [32]byte{}, nil},
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{"bytes32", [33]byte{}, typeErr(formatSliceString(reflect.Uint8, 32), formatSliceString(reflect.Uint8, 33))},
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{"bytes32", common.Hash{1}, nil},
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{"bytes31", [31]byte{}, nil},
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{"bytes31", [32]byte{}, typeErr(formatSliceString(reflect.Uint8, 31), formatSliceString(reflect.Uint8, 32))},
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{"bytes", []byte{0, 1}, nil},
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{"bytes", [2]byte{0, 1}, nil},
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{"bytes", common.Hash{1}, nil},
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{"string", "hello world", nil},
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{"bytes32[]", [][32]byte{[32]byte{}}, nil},
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} {
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typ, err := NewType(test.typ)
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if err != nil {
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t.Fatal("unexpected parse error:", err)
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}
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err = typeCheck(typ, reflect.ValueOf(test.input))
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if err != nil && test.err == nil {
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t.Errorf("%d failed. Expected no err but got: %v", i, err)
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continue
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}
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if err == nil && test.err != nil {
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t.Errorf("%d failed. Expected err: %v but got none", i, test.err)
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continue
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}
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if err != nil && test.err != nil && err.Error() != test.err.Error() {
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t.Errorf("%d failed. Expected err: '%v' got err: '%v'", i, test.err, err)
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}
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}
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}
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func TestPack(t *testing.T) {
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for i, test := range []struct {
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typ string
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input interface{}
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output []byte
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}{
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{"uint16", uint16(2), pad([]byte{2}, 32, true)},
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{"uint16[]", []uint16{1, 2}, formatSliceOutput([]byte{1}, []byte{2})},
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{"uint256[]", []*big.Int{big.NewInt(1), big.NewInt(2)}, formatSliceOutput([]byte{1}, []byte{2})},
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{"address[]", []common.Address{common.Address{1}, common.Address{2}}, formatSliceOutput(pad([]byte{1}, 20, false), pad([]byte{2}, 20, false))},
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{"bytes32[]", []common.Hash{common.Hash{1}, common.Hash{2}}, formatSliceOutput(pad([]byte{1}, 32, false), pad([]byte{2}, 32, false))},
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} {
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typ, err := NewType(test.typ)
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if err != nil {
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t.Fatal("unexpected parse error:", err)
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}
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output, err := typ.pack(reflect.ValueOf(test.input))
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if err != nil {
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t.Fatal("unexpected pack error:", err)
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}
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if !bytes.Equal(output, test.output) {
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t.Errorf("%d failed. Expected bytes: '%x' Got: '%x'", i, test.output, output)
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}
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}
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}
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func TestMethodPack(t *testing.T) {
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abi, err := JSON(strings.NewReader(jsondata2))
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if err != nil {
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t.Fatal(err)
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}
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sig := abi.Methods["slice"].Id()
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sig = append(sig, common.LeftPadBytes([]byte{32}, 32)...)
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sig = append(sig, common.LeftPadBytes([]byte{2}, 32)...)
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sig = append(sig, common.LeftPadBytes([]byte{1}, 32)...)
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sig = append(sig, common.LeftPadBytes([]byte{2}, 32)...)
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packed, err := abi.Pack("slice", []uint32{1, 2})
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if err != nil {
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t.Error(err)
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}
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if !bytes.Equal(packed, sig) {
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t.Errorf("expected %x got %x", sig, packed)
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}
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var addrA, addrB = common.Address{1}, common.Address{2}
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sig = abi.Methods["sliceAddress"].Id()
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sig = append(sig, common.LeftPadBytes([]byte{32}, 32)...)
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sig = append(sig, common.LeftPadBytes([]byte{2}, 32)...)
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sig = append(sig, common.LeftPadBytes(addrA[:], 32)...)
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sig = append(sig, common.LeftPadBytes(addrB[:], 32)...)
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packed, err = abi.Pack("sliceAddress", []common.Address{addrA, addrB})
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if err != nil {
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t.Fatal(err)
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}
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if !bytes.Equal(packed, sig) {
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t.Errorf("expected %x got %x", sig, packed)
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}
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var addrC, addrD = common.Address{3}, common.Address{4}
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sig = abi.Methods["sliceMultiAddress"].Id()
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sig = append(sig, common.LeftPadBytes([]byte{64}, 32)...)
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sig = append(sig, common.LeftPadBytes([]byte{160}, 32)...)
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sig = append(sig, common.LeftPadBytes([]byte{2}, 32)...)
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sig = append(sig, common.LeftPadBytes(addrA[:], 32)...)
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sig = append(sig, common.LeftPadBytes(addrB[:], 32)...)
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sig = append(sig, common.LeftPadBytes([]byte{2}, 32)...)
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sig = append(sig, common.LeftPadBytes(addrC[:], 32)...)
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sig = append(sig, common.LeftPadBytes(addrD[:], 32)...)
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packed, err = abi.Pack("sliceMultiAddress", []common.Address{addrA, addrB}, []common.Address{addrC, addrD})
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if err != nil {
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t.Fatal(err)
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}
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if !bytes.Equal(packed, sig) {
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t.Errorf("expected %x got %x", sig, packed)
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}
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sig = abi.Methods["slice256"].Id()
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sig = append(sig, common.LeftPadBytes([]byte{32}, 32)...)
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sig = append(sig, common.LeftPadBytes([]byte{2}, 32)...)
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sig = append(sig, common.LeftPadBytes([]byte{1}, 32)...)
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sig = append(sig, common.LeftPadBytes([]byte{2}, 32)...)
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packed, err = abi.Pack("slice256", []*big.Int{big.NewInt(1), big.NewInt(2)})
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if err != nil {
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t.Error(err)
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}
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if !bytes.Equal(packed, sig) {
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t.Errorf("expected %x got %x", sig, packed)
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}
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}
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const jsondata = `
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[
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{ "type" : "function", "name" : "balance", "const" : true },
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{ "type" : "function", "name" : "send", "const" : false, "inputs" : [ { "name" : "amount", "type" : "uint256" } ] }
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]`
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const jsondata2 = `
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[
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{ "type" : "function", "name" : "balance", "const" : true },
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{ "type" : "function", "name" : "send", "const" : false, "inputs" : [ { "name" : "amount", "type" : "uint256" } ] },
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{ "type" : "function", "name" : "test", "const" : false, "inputs" : [ { "name" : "number", "type" : "uint32" } ] },
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{ "type" : "function", "name" : "string", "const" : false, "inputs" : [ { "name" : "inputs", "type" : "string" } ] },
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{ "type" : "function", "name" : "bool", "const" : false, "inputs" : [ { "name" : "inputs", "type" : "bool" } ] },
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{ "type" : "function", "name" : "address", "const" : false, "inputs" : [ { "name" : "inputs", "type" : "address" } ] },
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{ "type" : "function", "name" : "uint64[2]", "const" : false, "inputs" : [ { "name" : "inputs", "type" : "uint64[2]" } ] },
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{ "type" : "function", "name" : "uint64[]", "const" : false, "inputs" : [ { "name" : "inputs", "type" : "uint64[]" } ] },
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{ "type" : "function", "name" : "foo", "const" : false, "inputs" : [ { "name" : "inputs", "type" : "uint32" } ] },
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{ "type" : "function", "name" : "bar", "const" : false, "inputs" : [ { "name" : "inputs", "type" : "uint32" }, { "name" : "string", "type" : "uint16" } ] },
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{ "type" : "function", "name" : "slice", "const" : false, "inputs" : [ { "name" : "inputs", "type" : "uint32[2]" } ] },
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{ "type" : "function", "name" : "slice256", "const" : false, "inputs" : [ { "name" : "inputs", "type" : "uint256[2]" } ] },
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{ "type" : "function", "name" : "sliceAddress", "const" : false, "inputs" : [ { "name" : "inputs", "type" : "address[]" } ] },
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{ "type" : "function", "name" : "sliceMultiAddress", "const" : false, "inputs" : [ { "name" : "a", "type" : "address[]" }, { "name" : "b", "type" : "address[]" } ] }
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]`
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func TestReader(t *testing.T) {
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Uint256, _ := NewType("uint256")
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exp := ABI{
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Methods: map[string]Method{
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"balance": Method{
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"balance", true, nil, nil,
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},
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"send": Method{
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"send", false, []Argument{
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Argument{"amount", Uint256, false},
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}, nil,
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},
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},
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}
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abi, err := JSON(strings.NewReader(jsondata))
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if err != nil {
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t.Error(err)
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}
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// deep equal fails for some reason
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t.Skip()
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if !reflect.DeepEqual(abi, exp) {
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t.Errorf("\nabi: %v\ndoes not match exp: %v", abi, exp)
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}
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}
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func TestTestNumbers(t *testing.T) {
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abi, err := JSON(strings.NewReader(jsondata2))
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if err != nil {
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t.Error(err)
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t.FailNow()
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}
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if _, err := abi.Pack("balance"); err != nil {
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t.Error(err)
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}
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if _, err := abi.Pack("balance", 1); err == nil {
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t.Error("expected error for balance(1)")
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}
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if _, err := abi.Pack("doesntexist", nil); err == nil {
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t.Errorf("doesntexist shouldn't exist")
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}
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if _, err := abi.Pack("doesntexist", 1); err == nil {
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t.Errorf("doesntexist(1) shouldn't exist")
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}
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if _, err := abi.Pack("send", big.NewInt(1000)); err != nil {
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t.Error(err)
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}
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i := new(int)
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*i = 1000
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if _, err := abi.Pack("send", i); err == nil {
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t.Errorf("expected send( ptr ) to throw, requires *big.Int instead of *int")
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}
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if _, err := abi.Pack("test", uint32(1000)); err != nil {
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t.Error(err)
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}
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}
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func TestTestString(t *testing.T) {
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abi, err := JSON(strings.NewReader(jsondata2))
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if err != nil {
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t.Error(err)
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t.FailNow()
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}
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if _, err := abi.Pack("string", "hello world"); err != nil {
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t.Error(err)
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}
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}
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func TestTestBool(t *testing.T) {
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abi, err := JSON(strings.NewReader(jsondata2))
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if err != nil {
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t.Error(err)
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t.FailNow()
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}
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if _, err := abi.Pack("bool", true); err != nil {
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t.Error(err)
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}
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}
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func TestTestSlice(t *testing.T) {
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abi, err := JSON(strings.NewReader(jsondata2))
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if err != nil {
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t.Error(err)
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t.FailNow()
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}
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slice := make([]uint64, 2)
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if _, err := abi.Pack("uint64[2]", slice); err != nil {
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t.Error(err)
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}
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if _, err := abi.Pack("uint64[]", slice); err != nil {
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t.Error(err)
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}
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}
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func TestMethodSignature(t *testing.T) {
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String, _ := NewType("string")
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m := Method{"foo", false, []Argument{Argument{"bar", String, false}, Argument{"baz", String, false}}, nil}
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exp := "foo(string,string)"
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if m.Sig() != exp {
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t.Error("signature mismatch", exp, "!=", m.Sig())
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}
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idexp := crypto.Keccak256([]byte(exp))[:4]
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if !bytes.Equal(m.Id(), idexp) {
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t.Errorf("expected ids to match %x != %x", m.Id(), idexp)
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}
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uintt, _ := NewType("uint")
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m = Method{"foo", false, []Argument{Argument{"bar", uintt, false}}, nil}
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exp = "foo(uint256)"
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if m.Sig() != exp {
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t.Error("signature mismatch", exp, "!=", m.Sig())
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}
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}
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func TestOldPack(t *testing.T) {
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abi, err := JSON(strings.NewReader(jsondata2))
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if err != nil {
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t.Error(err)
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t.FailNow()
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}
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sig := crypto.Keccak256([]byte("foo(uint32)"))[:4]
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sig = append(sig, make([]byte, 32)...)
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sig[35] = 10
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packed, err := abi.Pack("foo", uint32(10))
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if err != nil {
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t.Error(err)
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t.FailNow()
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}
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if !bytes.Equal(packed, sig) {
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t.Errorf("expected %x got %x", sig, packed)
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}
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}
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func TestMultiPack(t *testing.T) {
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abi, err := JSON(strings.NewReader(jsondata2))
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if err != nil {
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t.Error(err)
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t.FailNow()
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}
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sig := crypto.Keccak256([]byte("bar(uint32,uint16)"))[:4]
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sig = append(sig, make([]byte, 64)...)
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sig[35] = 10
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sig[67] = 11
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packed, err := abi.Pack("bar", uint32(10), uint16(11))
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if err != nil {
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t.Error(err)
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t.FailNow()
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}
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if !bytes.Equal(packed, sig) {
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t.Errorf("expected %x got %x", sig, packed)
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}
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}
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func ExampleJSON() {
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const definition = `[{"constant":true,"inputs":[{"name":"","type":"address"}],"name":"isBar","outputs":[{"name":"","type":"bool"}],"type":"function"}]`
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abi, err := JSON(strings.NewReader(definition))
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if err != nil {
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log.Fatalln(err)
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}
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out, err := abi.Pack("isBar", common.HexToAddress("01"))
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if err != nil {
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log.Fatalln(err)
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}
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fmt.Printf("%x\n", out)
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// Output:
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// 1f2c40920000000000000000000000000000000000000000000000000000000000000001
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}
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func TestInputVariableInputLength(t *testing.T) {
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const definition = `[
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{ "type" : "function", "name" : "strOne", "const" : true, "inputs" : [ { "name" : "str", "type" : "string" } ] },
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{ "type" : "function", "name" : "bytesOne", "const" : true, "inputs" : [ { "name" : "str", "type" : "bytes" } ] },
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{ "type" : "function", "name" : "strTwo", "const" : true, "inputs" : [ { "name" : "str", "type" : "string" }, { "name" : "str1", "type" : "string" } ] }
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]`
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abi, err := JSON(strings.NewReader(definition))
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if err != nil {
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t.Fatal(err)
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}
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// test one string
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strin := "hello world"
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strpack, err := abi.Pack("strOne", strin)
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if err != nil {
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t.Error(err)
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}
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offset := make([]byte, 32)
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offset[31] = 32
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length := make([]byte, 32)
|
|
length[31] = byte(len(strin))
|
|
value := common.RightPadBytes([]byte(strin), 32)
|
|
exp := append(offset, append(length, value...)...)
|
|
|
|
// ignore first 4 bytes of the output. This is the function identifier
|
|
strpack = strpack[4:]
|
|
if !bytes.Equal(strpack, exp) {
|
|
t.Errorf("expected %x, got %x\n", exp, strpack)
|
|
}
|
|
|
|
// test one bytes
|
|
btspack, err := abi.Pack("bytesOne", []byte(strin))
|
|
if err != nil {
|
|
t.Error(err)
|
|
}
|
|
// ignore first 4 bytes of the output. This is the function identifier
|
|
btspack = btspack[4:]
|
|
if !bytes.Equal(btspack, exp) {
|
|
t.Errorf("expected %x, got %x\n", exp, btspack)
|
|
}
|
|
|
|
// test two strings
|
|
str1 := "hello"
|
|
str2 := "world"
|
|
str2pack, err := abi.Pack("strTwo", str1, str2)
|
|
if err != nil {
|
|
t.Error(err)
|
|
}
|
|
|
|
offset1 := make([]byte, 32)
|
|
offset1[31] = 64
|
|
length1 := make([]byte, 32)
|
|
length1[31] = byte(len(str1))
|
|
value1 := common.RightPadBytes([]byte(str1), 32)
|
|
|
|
offset2 := make([]byte, 32)
|
|
offset2[31] = 128
|
|
length2 := make([]byte, 32)
|
|
length2[31] = byte(len(str2))
|
|
value2 := common.RightPadBytes([]byte(str2), 32)
|
|
|
|
exp2 := append(offset1, offset2...)
|
|
exp2 = append(exp2, append(length1, value1...)...)
|
|
exp2 = append(exp2, append(length2, value2...)...)
|
|
|
|
// ignore first 4 bytes of the output. This is the function identifier
|
|
str2pack = str2pack[4:]
|
|
if !bytes.Equal(str2pack, exp2) {
|
|
t.Errorf("expected %x, got %x\n", exp, str2pack)
|
|
}
|
|
|
|
// test two strings, first > 32, second < 32
|
|
str1 = strings.Repeat("a", 33)
|
|
str2pack, err = abi.Pack("strTwo", str1, str2)
|
|
if err != nil {
|
|
t.Error(err)
|
|
}
|
|
|
|
offset1 = make([]byte, 32)
|
|
offset1[31] = 64
|
|
length1 = make([]byte, 32)
|
|
length1[31] = byte(len(str1))
|
|
value1 = common.RightPadBytes([]byte(str1), 64)
|
|
offset2[31] = 160
|
|
|
|
exp2 = append(offset1, offset2...)
|
|
exp2 = append(exp2, append(length1, value1...)...)
|
|
exp2 = append(exp2, append(length2, value2...)...)
|
|
|
|
// ignore first 4 bytes of the output. This is the function identifier
|
|
str2pack = str2pack[4:]
|
|
if !bytes.Equal(str2pack, exp2) {
|
|
t.Errorf("expected %x, got %x\n", exp, str2pack)
|
|
}
|
|
|
|
// test two strings, first > 32, second >32
|
|
str1 = strings.Repeat("a", 33)
|
|
str2 = strings.Repeat("a", 33)
|
|
str2pack, err = abi.Pack("strTwo", str1, str2)
|
|
if err != nil {
|
|
t.Error(err)
|
|
}
|
|
|
|
offset1 = make([]byte, 32)
|
|
offset1[31] = 64
|
|
length1 = make([]byte, 32)
|
|
length1[31] = byte(len(str1))
|
|
value1 = common.RightPadBytes([]byte(str1), 64)
|
|
|
|
offset2 = make([]byte, 32)
|
|
offset2[31] = 160
|
|
length2 = make([]byte, 32)
|
|
length2[31] = byte(len(str2))
|
|
value2 = common.RightPadBytes([]byte(str2), 64)
|
|
|
|
exp2 = append(offset1, offset2...)
|
|
exp2 = append(exp2, append(length1, value1...)...)
|
|
exp2 = append(exp2, append(length2, value2...)...)
|
|
|
|
// ignore first 4 bytes of the output. This is the function identifier
|
|
str2pack = str2pack[4:]
|
|
if !bytes.Equal(str2pack, exp2) {
|
|
t.Errorf("expected %x, got %x\n", exp, str2pack)
|
|
}
|
|
}
|
|
|
|
func TestDefaultFunctionParsing(t *testing.T) {
|
|
const definition = `[{ "name" : "balance" }]`
|
|
|
|
abi, err := JSON(strings.NewReader(definition))
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
if _, ok := abi.Methods["balance"]; !ok {
|
|
t.Error("expected 'balance' to be present")
|
|
}
|
|
}
|
|
|
|
func TestBareEvents(t *testing.T) {
|
|
const definition = `[
|
|
{ "type" : "event", "name" : "balance" },
|
|
{ "type" : "event", "name" : "name" }]`
|
|
|
|
abi, err := JSON(strings.NewReader(definition))
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
if len(abi.Events) != 2 {
|
|
t.Error("expected 2 events")
|
|
}
|
|
|
|
if _, ok := abi.Events["balance"]; !ok {
|
|
t.Error("expected 'balance' event to be present")
|
|
}
|
|
|
|
if _, ok := abi.Events["name"]; !ok {
|
|
t.Error("expected 'name' event to be present")
|
|
}
|
|
}
|
|
|
|
func TestMultiReturnWithStruct(t *testing.T) {
|
|
const definition = `[
|
|
{ "name" : "multi", "const" : false, "outputs": [ { "name": "Int", "type": "uint256" }, { "name": "String", "type": "string" } ] }]`
|
|
|
|
abi, err := JSON(strings.NewReader(definition))
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
// using buff to make the code readable
|
|
buff := new(bytes.Buffer)
|
|
buff.Write(common.Hex2Bytes("0000000000000000000000000000000000000000000000000000000000000001"))
|
|
buff.Write(common.Hex2Bytes("0000000000000000000000000000000000000000000000000000000000000040"))
|
|
buff.Write(common.Hex2Bytes("0000000000000000000000000000000000000000000000000000000000000005"))
|
|
stringOut := "hello"
|
|
buff.Write(common.RightPadBytes([]byte(stringOut), 32))
|
|
|
|
var inter struct {
|
|
Int *big.Int
|
|
String string
|
|
}
|
|
err = abi.Unpack(&inter, "multi", buff.Bytes())
|
|
if err != nil {
|
|
t.Error(err)
|
|
}
|
|
|
|
if inter.Int == nil || inter.Int.Cmp(big.NewInt(1)) != 0 {
|
|
t.Error("expected Int to be 1 got", inter.Int)
|
|
}
|
|
|
|
if inter.String != stringOut {
|
|
t.Error("expected String to be", stringOut, "got", inter.String)
|
|
}
|
|
|
|
var reversed struct {
|
|
String string
|
|
Int *big.Int
|
|
}
|
|
|
|
err = abi.Unpack(&reversed, "multi", buff.Bytes())
|
|
if err != nil {
|
|
t.Error(err)
|
|
}
|
|
|
|
if reversed.Int == nil || reversed.Int.Cmp(big.NewInt(1)) != 0 {
|
|
t.Error("expected Int to be 1 got", reversed.Int)
|
|
}
|
|
|
|
if reversed.String != stringOut {
|
|
t.Error("expected String to be", stringOut, "got", reversed.String)
|
|
}
|
|
}
|
|
|
|
func TestMultiReturnWithSlice(t *testing.T) {
|
|
const definition = `[
|
|
{ "name" : "multi", "const" : false, "outputs": [ { "name": "Int", "type": "uint256" }, { "name": "String", "type": "string" } ] }]`
|
|
|
|
abi, err := JSON(strings.NewReader(definition))
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
// using buff to make the code readable
|
|
buff := new(bytes.Buffer)
|
|
buff.Write(common.Hex2Bytes("0000000000000000000000000000000000000000000000000000000000000001"))
|
|
buff.Write(common.Hex2Bytes("0000000000000000000000000000000000000000000000000000000000000040"))
|
|
buff.Write(common.Hex2Bytes("0000000000000000000000000000000000000000000000000000000000000005"))
|
|
stringOut := "hello"
|
|
buff.Write(common.RightPadBytes([]byte(stringOut), 32))
|
|
|
|
var inter []interface{}
|
|
err = abi.Unpack(&inter, "multi", buff.Bytes())
|
|
if err != nil {
|
|
t.Error(err)
|
|
}
|
|
|
|
if len(inter) != 2 {
|
|
t.Fatal("expected 2 results got", len(inter))
|
|
}
|
|
|
|
if num, ok := inter[0].(*big.Int); !ok || num.Cmp(big.NewInt(1)) != 0 {
|
|
t.Error("expected index 0 to be 1 got", num)
|
|
}
|
|
|
|
if str, ok := inter[1].(string); !ok || str != stringOut {
|
|
t.Error("expected index 1 to be", stringOut, "got", str)
|
|
}
|
|
}
|
|
|
|
func TestMarshalArrays(t *testing.T) {
|
|
const definition = `[
|
|
{ "name" : "bytes32", "const" : false, "outputs": [ { "type": "bytes32" } ] },
|
|
{ "name" : "bytes10", "const" : false, "outputs": [ { "type": "bytes10" } ] }
|
|
]`
|
|
|
|
abi, err := JSON(strings.NewReader(definition))
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
output := common.LeftPadBytes([]byte{1}, 32)
|
|
|
|
var bytes10 [10]byte
|
|
err = abi.Unpack(&bytes10, "bytes32", output)
|
|
if err == nil || err.Error() != "abi: cannot unmarshal src (len=32) in to dst (len=10)" {
|
|
t.Error("expected error or bytes32 not be assignable to bytes10:", err)
|
|
}
|
|
|
|
var bytes32 [32]byte
|
|
err = abi.Unpack(&bytes32, "bytes32", output)
|
|
if err != nil {
|
|
t.Error("didn't expect error:", err)
|
|
}
|
|
if !bytes.Equal(bytes32[:], output) {
|
|
t.Error("expected bytes32[31] to be 1 got", bytes32[31])
|
|
}
|
|
|
|
type (
|
|
B10 [10]byte
|
|
B32 [32]byte
|
|
)
|
|
|
|
var b10 B10
|
|
err = abi.Unpack(&b10, "bytes32", output)
|
|
if err == nil || err.Error() != "abi: cannot unmarshal src (len=32) in to dst (len=10)" {
|
|
t.Error("expected error or bytes32 not be assignable to bytes10:", err)
|
|
}
|
|
|
|
var b32 B32
|
|
err = abi.Unpack(&b32, "bytes32", output)
|
|
if err != nil {
|
|
t.Error("didn't expect error:", err)
|
|
}
|
|
if !bytes.Equal(b32[:], output) {
|
|
t.Error("expected bytes32[31] to be 1 got", bytes32[31])
|
|
}
|
|
|
|
output[10] = 1
|
|
var shortAssignLong [32]byte
|
|
err = abi.Unpack(&shortAssignLong, "bytes10", output)
|
|
if err != nil {
|
|
t.Error("didn't expect error:", err)
|
|
}
|
|
if !bytes.Equal(output, shortAssignLong[:]) {
|
|
t.Errorf("expected %x to be %x", shortAssignLong, output)
|
|
}
|
|
}
|
|
|
|
func TestUnmarshal(t *testing.T) {
|
|
const definition = `[
|
|
{ "name" : "int", "const" : false, "outputs": [ { "type": "uint256" } ] },
|
|
{ "name" : "bool", "const" : false, "outputs": [ { "type": "bool" } ] },
|
|
{ "name" : "bytes", "const" : false, "outputs": [ { "type": "bytes" } ] },
|
|
{ "name" : "fixed", "const" : false, "outputs": [ { "type": "bytes32" } ] },
|
|
{ "name" : "multi", "const" : false, "outputs": [ { "type": "bytes" }, { "type": "bytes" } ] },
|
|
{ "name" : "addressSliceSingle", "const" : false, "outputs": [ { "type": "address[]" } ] },
|
|
{ "name" : "addressSliceDouble", "const" : false, "outputs": [ { "name": "a", "type": "address[]" }, { "name": "b", "type": "address[]" } ] },
|
|
{ "name" : "mixedBytes", "const" : true, "outputs": [ { "name": "a", "type": "bytes" }, { "name": "b", "type": "bytes32" } ] }]`
|
|
|
|
abi, err := JSON(strings.NewReader(definition))
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
buff := new(bytes.Buffer)
|
|
|
|
// marshal int
|
|
var Int *big.Int
|
|
err = abi.Unpack(&Int, "int", common.Hex2Bytes("0000000000000000000000000000000000000000000000000000000000000001"))
|
|
if err != nil {
|
|
t.Error(err)
|
|
}
|
|
|
|
if Int == nil || Int.Cmp(big.NewInt(1)) != 0 {
|
|
t.Error("expected Int to be 1 got", Int)
|
|
}
|
|
|
|
// marshal bool
|
|
var Bool bool
|
|
err = abi.Unpack(&Bool, "bool", common.Hex2Bytes("0000000000000000000000000000000000000000000000000000000000000001"))
|
|
if err != nil {
|
|
t.Error(err)
|
|
}
|
|
|
|
if !Bool {
|
|
t.Error("expected Bool to be true")
|
|
}
|
|
|
|
// marshal dynamic bytes max length 32
|
|
buff.Write(common.Hex2Bytes("0000000000000000000000000000000000000000000000000000000000000020"))
|
|
buff.Write(common.Hex2Bytes("0000000000000000000000000000000000000000000000000000000000000020"))
|
|
bytesOut := common.RightPadBytes([]byte("hello"), 32)
|
|
buff.Write(bytesOut)
|
|
|
|
var Bytes []byte
|
|
err = abi.Unpack(&Bytes, "bytes", buff.Bytes())
|
|
if err != nil {
|
|
t.Error(err)
|
|
}
|
|
|
|
if !bytes.Equal(Bytes, bytesOut) {
|
|
t.Errorf("expected %x got %x", bytesOut, Bytes)
|
|
}
|
|
|
|
// marshall dynamic bytes max length 64
|
|
buff.Reset()
|
|
buff.Write(common.Hex2Bytes("0000000000000000000000000000000000000000000000000000000000000020"))
|
|
buff.Write(common.Hex2Bytes("0000000000000000000000000000000000000000000000000000000000000040"))
|
|
bytesOut = common.RightPadBytes([]byte("hello"), 64)
|
|
buff.Write(bytesOut)
|
|
|
|
err = abi.Unpack(&Bytes, "bytes", buff.Bytes())
|
|
if err != nil {
|
|
t.Error(err)
|
|
}
|
|
|
|
if !bytes.Equal(Bytes, bytesOut) {
|
|
t.Errorf("expected %x got %x", bytesOut, Bytes)
|
|
}
|
|
|
|
// marshall dynamic bytes max length 63
|
|
buff.Reset()
|
|
buff.Write(common.Hex2Bytes("0000000000000000000000000000000000000000000000000000000000000020"))
|
|
buff.Write(common.Hex2Bytes("000000000000000000000000000000000000000000000000000000000000003f"))
|
|
bytesOut = common.RightPadBytes([]byte("hello"), 63)
|
|
buff.Write(bytesOut)
|
|
|
|
err = abi.Unpack(&Bytes, "bytes", buff.Bytes())
|
|
if err != nil {
|
|
t.Error(err)
|
|
}
|
|
|
|
if !bytes.Equal(Bytes, bytesOut) {
|
|
t.Errorf("expected %x got %x", bytesOut, Bytes)
|
|
}
|
|
|
|
// marshal dynamic bytes output empty
|
|
err = abi.Unpack(&Bytes, "bytes", nil)
|
|
if err == nil {
|
|
t.Error("expected error")
|
|
}
|
|
|
|
// marshal dynamic bytes length 5
|
|
buff.Reset()
|
|
buff.Write(common.Hex2Bytes("0000000000000000000000000000000000000000000000000000000000000020"))
|
|
buff.Write(common.Hex2Bytes("0000000000000000000000000000000000000000000000000000000000000005"))
|
|
buff.Write(common.RightPadBytes([]byte("hello"), 32))
|
|
|
|
err = abi.Unpack(&Bytes, "bytes", buff.Bytes())
|
|
if err != nil {
|
|
t.Error(err)
|
|
}
|
|
|
|
if !bytes.Equal(Bytes, []byte("hello")) {
|
|
t.Errorf("expected %x got %x", bytesOut, Bytes)
|
|
}
|
|
|
|
// marshal dynamic bytes length 5
|
|
buff.Reset()
|
|
buff.Write(common.RightPadBytes([]byte("hello"), 32))
|
|
|
|
var hash common.Hash
|
|
err = abi.Unpack(&hash, "fixed", buff.Bytes())
|
|
if err != nil {
|
|
t.Error(err)
|
|
}
|
|
|
|
helloHash := common.BytesToHash(common.RightPadBytes([]byte("hello"), 32))
|
|
if hash != helloHash {
|
|
t.Errorf("Expected %x to equal %x", hash, helloHash)
|
|
}
|
|
|
|
// marshal error
|
|
buff.Reset()
|
|
buff.Write(common.Hex2Bytes("0000000000000000000000000000000000000000000000000000000000000020"))
|
|
err = abi.Unpack(&Bytes, "bytes", buff.Bytes())
|
|
if err == nil {
|
|
t.Error("expected error")
|
|
}
|
|
|
|
err = abi.Unpack(&Bytes, "multi", make([]byte, 64))
|
|
if err == nil {
|
|
t.Error("expected error")
|
|
}
|
|
|
|
// marshal mixed bytes
|
|
buff.Reset()
|
|
buff.Write(common.Hex2Bytes("0000000000000000000000000000000000000000000000000000000000000040"))
|
|
fixed := common.Hex2Bytes("0000000000000000000000000000000000000000000000000000000000000001")
|
|
buff.Write(fixed)
|
|
buff.Write(common.Hex2Bytes("0000000000000000000000000000000000000000000000000000000000000020"))
|
|
bytesOut = common.RightPadBytes([]byte("hello"), 32)
|
|
buff.Write(bytesOut)
|
|
|
|
var out []interface{}
|
|
err = abi.Unpack(&out, "mixedBytes", buff.Bytes())
|
|
if err != nil {
|
|
t.Fatal("didn't expect error:", err)
|
|
}
|
|
|
|
if !bytes.Equal(bytesOut, out[0].([]byte)) {
|
|
t.Errorf("expected %x, got %x", bytesOut, out[0])
|
|
}
|
|
|
|
if !bytes.Equal(fixed, out[1].([]byte)) {
|
|
t.Errorf("expected %x, got %x", fixed, out[1])
|
|
}
|
|
|
|
// marshal address slice
|
|
buff.Reset()
|
|
buff.Write(common.Hex2Bytes("0000000000000000000000000000000000000000000000000000000000000020")) // offset
|
|
buff.Write(common.Hex2Bytes("0000000000000000000000000000000000000000000000000000000000000001")) // size
|
|
buff.Write(common.Hex2Bytes("0000000000000000000000000100000000000000000000000000000000000000"))
|
|
|
|
var outAddr []common.Address
|
|
err = abi.Unpack(&outAddr, "addressSliceSingle", buff.Bytes())
|
|
if err != nil {
|
|
t.Fatal("didn't expect error:", err)
|
|
}
|
|
|
|
if len(outAddr) != 1 {
|
|
t.Fatal("expected 1 item, got", len(outAddr))
|
|
}
|
|
|
|
if outAddr[0] != (common.Address{1}) {
|
|
t.Errorf("expected %x, got %x", common.Address{1}, outAddr[0])
|
|
}
|
|
|
|
// marshal multiple address slice
|
|
buff.Reset()
|
|
buff.Write(common.Hex2Bytes("0000000000000000000000000000000000000000000000000000000000000040")) // offset
|
|
buff.Write(common.Hex2Bytes("0000000000000000000000000000000000000000000000000000000000000080")) // offset
|
|
buff.Write(common.Hex2Bytes("0000000000000000000000000000000000000000000000000000000000000001")) // size
|
|
buff.Write(common.Hex2Bytes("0000000000000000000000000100000000000000000000000000000000000000"))
|
|
buff.Write(common.Hex2Bytes("0000000000000000000000000000000000000000000000000000000000000002")) // size
|
|
buff.Write(common.Hex2Bytes("0000000000000000000000000200000000000000000000000000000000000000"))
|
|
buff.Write(common.Hex2Bytes("0000000000000000000000000300000000000000000000000000000000000000"))
|
|
|
|
var outAddrStruct struct {
|
|
A []common.Address
|
|
B []common.Address
|
|
}
|
|
err = abi.Unpack(&outAddrStruct, "addressSliceDouble", buff.Bytes())
|
|
if err != nil {
|
|
t.Fatal("didn't expect error:", err)
|
|
}
|
|
|
|
if len(outAddrStruct.A) != 1 {
|
|
t.Fatal("expected 1 item, got", len(outAddrStruct.A))
|
|
}
|
|
|
|
if outAddrStruct.A[0] != (common.Address{1}) {
|
|
t.Errorf("expected %x, got %x", common.Address{1}, outAddrStruct.A[0])
|
|
}
|
|
|
|
if len(outAddrStruct.B) != 2 {
|
|
t.Fatal("expected 1 item, got", len(outAddrStruct.B))
|
|
}
|
|
|
|
if outAddrStruct.B[0] != (common.Address{2}) {
|
|
t.Errorf("expected %x, got %x", common.Address{2}, outAddrStruct.B[0])
|
|
}
|
|
if outAddrStruct.B[1] != (common.Address{3}) {
|
|
t.Errorf("expected %x, got %x", common.Address{3}, outAddrStruct.B[1])
|
|
}
|
|
|
|
// marshal invalid address slice
|
|
buff.Reset()
|
|
buff.Write(common.Hex2Bytes("0000000000000000000000000000000000000000000000000000000000000100"))
|
|
|
|
err = abi.Unpack(&outAddr, "addressSliceSingle", buff.Bytes())
|
|
if err == nil {
|
|
t.Fatal("expected error:", err)
|
|
}
|
|
}
|