add abi

accounts/abi/abifuzzer_test.go

+// Copyright 2020 The go-ethereum Authors
+// This file is part of the go-ethereum library.
+//
+// The go-ethereum library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The go-ethereum library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
+
+package abi
+
+import (
+	"fmt"
+	"reflect"
+	"strings"
+	"testing"
+
+	fuzz "github.com/google/gofuzz"
+)
+
+// TestReplicate can be used to replicate crashers from the fuzzing tests.
+// Just replace testString with the data in .quoted
+func TestReplicate(t *testing.T) {
+	t.Parallel()
+	//t.Skip("Test only useful for reproducing issues")
+	fuzzAbi([]byte("\x20\x20\x20\x20\x20\x20\x20\x20\x80\x00\x00\x00\x20\x20\x20\x20\x00"))
+	//fuzzAbi([]byte("asdfasdfkadsf;lasdf;lasd;lfk"))
+}
+
+// FuzzABI is the main entrypoint for fuzzing
+func FuzzABI(f *testing.F) {
+	f.Fuzz(func(t *testing.T, data []byte) {
+		fuzzAbi(data)
+	})
+}
+
+var (
+	names    = []string{"_name", "name", "NAME", "name_", "__", "_name_", "n"}
+	stateMut = []string{"pure", "view", "payable"}
+	pays     = []string{"true", "false"}
+	vNames   = []string{"a", "b", "c", "d", "e", "f", "g"}
+	varNames = append(vNames, names...)
+	varTypes = []string{"bool", "address", "bytes", "string",
+		"uint8", "int8", "uint8", "int8", "uint16", "int16",
+		"uint24", "int24", "uint32", "int32", "uint40", "int40", "uint48", "int48", "uint56", "int56",
+		"uint64", "int64", "uint72", "int72", "uint80", "int80", "uint88", "int88", "uint96", "int96",
+		"uint104", "int104", "uint112", "int112", "uint120", "int120", "uint128", "int128", "uint136", "int136",
+		"uint144", "int144", "uint152", "int152", "uint160", "int160", "uint168", "int168", "uint176", "int176",
+		"uint184", "int184", "uint192", "int192", "uint200", "int200", "uint208", "int208", "uint216", "int216",
+		"uint224", "int224", "uint232", "int232", "uint240", "int240", "uint248", "int248", "uint256", "int256",
+		"bytes1", "bytes2", "bytes3", "bytes4", "bytes5", "bytes6", "bytes7", "bytes8", "bytes9", "bytes10", "bytes11",
+		"bytes12", "bytes13", "bytes14", "bytes15", "bytes16", "bytes17", "bytes18", "bytes19", "bytes20", "bytes21",
+		"bytes22", "bytes23", "bytes24", "bytes25", "bytes26", "bytes27", "bytes28", "bytes29", "bytes30", "bytes31",
+		"bytes32", "bytes"}
+)
+
+func unpackPack(abi ABI, method string, input []byte) ([]interface{}, bool) {
+	if out, err := abi.Unpack(method, input); err == nil {
+		_, err := abi.Pack(method, out...)
+		if err != nil {
+			// We have some false positives as we can unpack these type successfully, but not pack them
+			if err.Error() == "abi: cannot use []uint8 as type [0]int8 as argument" ||
+				err.Error() == "abi: cannot use uint8 as type int8 as argument" {
+				return out, false
+			}
+			panic(err)
+		}
+		return out, true
+	}
+	return nil, false
+}
+
+func packUnpack(abi ABI, method string, input *[]interface{}) bool {
+	if packed, err := abi.Pack(method, input); err == nil {
+		outptr := reflect.New(reflect.TypeOf(input))
+		err := abi.UnpackIntoInterface(outptr.Interface(), method, packed)
+		if err != nil {
+			panic(err)
+		}
+		out := outptr.Elem().Interface()
+		if !reflect.DeepEqual(input, out) {
+			panic(fmt.Sprintf("unpackPack is not equal, \ninput : %x\noutput: %x", input, out))
+		}
+		return true
+	}
+	return false
+}
+
+type arg struct {
+	name string
+	typ  string
+}
+
+func createABI(name string, stateMutability, payable *string, inputs []arg) (ABI, error) {
+	sig := fmt.Sprintf(`[{ "type" : "function", "name" : "%v" `, name)
+	if stateMutability != nil {
+		sig += fmt.Sprintf(`, "stateMutability": "%v" `, *stateMutability)
+	}
+	if payable != nil {
+		sig += fmt.Sprintf(`, "payable": %v `, *payable)
+	}
+	if len(inputs) > 0 {
+		sig += `, "inputs" : [ {`
+		for i, inp := range inputs {
+			sig += fmt.Sprintf(`"name" : "%v", "type" : "%v" `, inp.name, inp.typ)
+			if i+1 < len(inputs) {
+				sig += ","
+			}
+		}
+		sig += "} ]"
+		sig += `, "outputs" : [ {`
+		for i, inp := range inputs {
+			sig += fmt.Sprintf(`"name" : "%v", "type" : "%v" `, inp.name, inp.typ)
+			if i+1 < len(inputs) {
+				sig += ","
+			}
+		}
+		sig += "} ]"
+	}
+	sig += `}]`
+	//fmt.Printf("sig: %s\n", sig)
+	return JSON(strings.NewReader(sig))
+}
+
+func fuzzAbi(input []byte) {
+	var (
+		fuzzer    = fuzz.NewFromGoFuzz(input)
+		name      = oneOf(fuzzer, names)
+		stateM    = oneOfOrNil(fuzzer, stateMut)
+		payable   = oneOfOrNil(fuzzer, pays)
+		arguments []arg
+	)
+	for i := 0; i < upTo(fuzzer, 10); i++ {
+		argName := oneOf(fuzzer, varNames)
+		argTyp := oneOf(fuzzer, varTypes)
+		switch upTo(fuzzer, 10) {
+		case 0: // 10% chance to make it a slice
+			argTyp += "[]"
+		case 1: // 10% chance to make it an array
+			argTyp += fmt.Sprintf("[%d]", 1+upTo(fuzzer, 30))
+		default:
+		}
+		arguments = append(arguments, arg{name: argName, typ: argTyp})
+	}
+	abi, err := createABI(name, stateM, payable, arguments)
+	if err != nil {
+		//fmt.Printf("err: %v\n", err)
+		panic(err)
+	}
+	structs, _ := unpackPack(abi, name, input)
+	_ = packUnpack(abi, name, &structs)
+}
+
+func upTo(fuzzer *fuzz.Fuzzer, max int) int {
+	var i int
+	fuzzer.Fuzz(&i)
+	if i < 0 {
+		return (-1 - i) % max
+	}
+	return i % max
+}
+
+func oneOf(fuzzer *fuzz.Fuzzer, options []string) string {
+	return options[upTo(fuzzer, len(options))]
+}
+
+func oneOfOrNil(fuzzer *fuzz.Fuzzer, options []string) *string {
+	if i := upTo(fuzzer, len(options)+1); i < len(options) {
+		return &options[i]
+	}
+	return nil
+}

accounts/abi/argument.go

+// Copyright 2015 The go-ethereum Authors
+// This file is part of the go-ethereum library.
+//
+// The go-ethereum library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The go-ethereum library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
+
+package abi
+
+import (
+	"encoding/json"
+	"errors"
+	"fmt"
+	"reflect"
+	"strings"
+)
+
+// Argument holds the name of the argument and the corresponding type.
+// Types are used when packing and testing arguments.
+type Argument struct {
+	Name    string
+	Type    Type
+	Indexed bool // indexed is only used by events
+}
+
+type Arguments []Argument
+
+type ArgumentMarshaling struct {
+	Name         string
+	Type         string
+	InternalType string
+	Components   []ArgumentMarshaling
+	Indexed      bool
+}
+
+// UnmarshalJSON implements json.Unmarshaler interface.
+func (argument *Argument) UnmarshalJSON(data []byte) error {
+	var arg ArgumentMarshaling
+	err := json.Unmarshal(data, &arg)
+	if err != nil {
+		return fmt.Errorf("argument json err: %v", err)
+	}
+
+	argument.Type, err = NewType(arg.Type, arg.InternalType, arg.Components)
+	if err != nil {
+		return err
+	}
+	argument.Name = arg.Name
+	argument.Indexed = arg.Indexed
+
+	return nil
+}
+
+// NonIndexed returns the arguments with indexed arguments filtered out.
+func (arguments Arguments) NonIndexed() Arguments {
+	var ret []Argument
+	for _, arg := range arguments {
+		if !arg.Indexed {
+			ret = append(ret, arg)
+		}
+	}
+	return ret
+}
+
+// isTuple returns true for non-atomic constructs, like (uint,uint) or uint[].
+func (arguments Arguments) isTuple() bool {
+	return len(arguments) > 1
+}
+
+// Unpack performs the operation hexdata -> Go format.
+func (arguments Arguments) Unpack(data []byte) ([]any, error) {
+	if len(data) == 0 {
+		if len(arguments.NonIndexed()) != 0 {
+			return nil, errors.New("abi: attempting to unmarshal an empty string while arguments are expected")
+		}
+		return make([]any, 0), nil
+	}
+	return arguments.UnpackValues(data)
+}
+
+// UnpackIntoMap performs the operation hexdata -> mapping of argument name to argument value.
+func (arguments Arguments) UnpackIntoMap(v map[string]any, data []byte) error {
+	// Make sure map is not nil
+	if v == nil {
+		return errors.New("abi: cannot unpack into a nil map")
+	}
+	if len(data) == 0 {
+		if len(arguments.NonIndexed()) != 0 {
+			return errors.New("abi: attempting to unmarshal an empty string while arguments are expected")
+		}
+		return nil // Nothing to unmarshal, return
+	}
+	marshalledValues, err := arguments.UnpackValues(data)
+	if err != nil {
+		return err
+	}
+	for i, arg := range arguments.NonIndexed() {
+		v[arg.Name] = marshalledValues[i]
+	}
+	return nil
+}
+
+// Copy performs the operation go format -> provided struct.
+func (arguments Arguments) Copy(v any, values []any) error {
+	// make sure the passed value is arguments pointer
+	if reflect.Ptr != reflect.ValueOf(v).Kind() {
+		return fmt.Errorf("abi: Unpack(non-pointer %T)", v)
+	}
+	if len(values) == 0 {
+		if len(arguments.NonIndexed()) != 0 {
+			return errors.New("abi: attempting to copy no values while arguments are expected")
+		}
+		return nil // Nothing to copy, return
+	}
+	if arguments.isTuple() {
+		return arguments.copyTuple(v, values)
+	}
+	return arguments.copyAtomic(v, values[0])
+}
+
+// copyAtomic copies ( hexdata -> go ) a single value
+func (arguments Arguments) copyAtomic(v any, marshalledValues any) error {
+	dst := reflect.ValueOf(v).Elem()
+	src := reflect.ValueOf(marshalledValues)
+
+	if dst.Kind() == reflect.Struct {
+		return set(dst.Field(0), src)
+	}
+	return set(dst, src)
+}
+
+// copyTuple copies a batch of values from marshalledValues to v.
+func (arguments Arguments) copyTuple(v any, marshalledValues []any) error {
+	value := reflect.ValueOf(v).Elem()
+	nonIndexedArgs := arguments.NonIndexed()
+
+	switch value.Kind() {
+	case reflect.Struct:
+		argNames := make([]string, len(nonIndexedArgs))
+		for i, arg := range nonIndexedArgs {
+			argNames[i] = arg.Name
+		}
+		var err error
+		abi2struct, err := mapArgNamesToStructFields(argNames, value)
+		if err != nil {
+			return err
+		}
+		for i, arg := range nonIndexedArgs {
+			field := value.FieldByName(abi2struct[arg.Name])
+			if !field.IsValid() {
+				return fmt.Errorf("abi: field %s can't be found in the given value", arg.Name)
+			}
+			if err := set(field, reflect.ValueOf(marshalledValues[i])); err != nil {
+				return err
+			}
+		}
+	case reflect.Slice, reflect.Array:
+		if value.Len() < len(marshalledValues) {
+			return fmt.Errorf("abi: insufficient number of arguments for unpack, want %d, got %d", len(arguments), value.Len())
+		}
+		for i := range nonIndexedArgs {
+			if err := set(value.Index(i), reflect.ValueOf(marshalledValues[i])); err != nil {
+				return err
+			}
+		}
+	default:
+		return fmt.Errorf("abi:[2] cannot unmarshal tuple in to %v", value.Type())
+	}
+	return nil
+}
+
+// UnpackValues can be used to unpack ABI-encoded hexdata according to the ABI-specification,
+// without supplying a struct to unpack into. Instead, this method returns a list containing the
+// values. An atomic argument will be a list with one element.
+func (arguments Arguments) UnpackValues(data []byte) ([]any, error) {
+	var (
+		retval      = make([]any, 0)
+		virtualArgs = 0
+		index       = 0
+	)
+
+	for _, arg := range arguments {
+		if arg.Indexed {
+			continue
+		}
+		marshalledValue, err := toGoType((index+virtualArgs)*32, arg.Type, data)
+		if err != nil {
+			return nil, err
+		}
+		if arg.Type.T == ArrayTy && !isDynamicType(arg.Type) {
+			// If we have a static array, like [3]uint256, these are coded as
+			// just like uint256,uint256,uint256.
+			// This means that we need to add two 'virtual' arguments when
+			// we count the index from now on.
+			//
+			// Array values nested multiple levels deep are also encoded inline:
+			// [2][3]uint256: uint256,uint256,uint256,uint256,uint256,uint256
+			//
+			// Calculate the full array size to get the correct offset for the next argument.
+			// Decrement it by 1, as the normal index increment is still applied.
+			virtualArgs += getTypeSize(arg.Type)/32 - 1
+		} else if arg.Type.T == TupleTy && !isDynamicType(arg.Type) {
+			// If we have a static tuple, like (uint256, bool, uint256), these are
+			// coded as just like uint256,bool,uint256
+			virtualArgs += getTypeSize(arg.Type)/32 - 1
+		}
+		retval = append(retval, marshalledValue)
+		index++
+	}
+	return retval, nil
+}
+
+// PackValues performs the operation Go format -> Hexdata.
+// It is the semantic opposite of UnpackValues.
+func (arguments Arguments) PackValues(args []any) ([]byte, error) {
+	return arguments.Pack(args...)
+}
+
+// Pack performs the operation Go format -> Hexdata.
+func (arguments Arguments) Pack(args ...any) ([]byte, error) {
+	// Make sure arguments match up and pack them
+	abiArgs := arguments
+	if len(args) != len(abiArgs) {
+		return nil, fmt.Errorf("argument count mismatch: got %d for %d", len(args), len(abiArgs))
+	}
+	// variable input is the output appended at the end of packed
+	// output. This is used for strings and bytes types input.
+	var variableInput []byte
+
+	// input offset is the bytes offset for packed output
+	inputOffset := 0
+	for _, abiArg := range abiArgs {
+		inputOffset += getTypeSize(abiArg.Type)
+	}
+	var ret []byte
+	for i, a := range args {
+		input := abiArgs[i]
+		// pack the input
+		packed, err := input.Type.pack(reflect.ValueOf(a))
+		if err != nil {
+			return nil, err
+		}
+		// check for dynamic types
+		if isDynamicType(input.Type) {
+			// set the offset
+			ret = append(ret, packNum(reflect.ValueOf(inputOffset))...)
+			// calculate next offset
+			inputOffset += len(packed)
+			// append to variable input
+			variableInput = append(variableInput, packed...)
+		} else {
+			// append the packed value to the input
+			ret = append(ret, packed...)
+		}
+	}
+	// append the variable input at the end of the packed input
+	ret = append(ret, variableInput...)
+
+	return ret, nil
+}
+
+// ToCamelCase converts an under-score string to a camel-case string
+func ToCamelCase(input string) string {
+	parts := strings.Split(input, "_")
+	for i, s := range parts {
+		if len(s) > 0 {
+			parts[i] = strings.ToUpper(s[:1]) + s[1:]
+		}
+	}
+	return strings.Join(parts, "")
+}

accounts/abi/doc.go

+// Copyright 2015 The go-ethereum Authors
+// This file is part of the go-ethereum library.
+//
+// The go-ethereum library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The go-ethereum library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
+
+// Package abi implements the Ethereum ABI (Application Binary
+// Interface).
+//
+// The Ethereum ABI is strongly typed, known at compile time
+// and static. This ABI will handle basic type casting; unsigned
+// to signed and visa versa. It does not handle slice casting such
+// as unsigned slice to signed slice. Bit size type casting is also
+// handled. ints with a bit size of 32 will be properly cast to int256,
+// etc.
+package abi

accounts/abi/error.go

+// Copyright 2016 The go-ethereum Authors
+// This file is part of the go-ethereum library.
+//
+// The go-ethereum library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The go-ethereum library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
+
+package abi
+
+import (
+	"bytes"
+	"fmt"
+	metatypes "github.com/CaduceusMetaverseProtocol/MetaTypes/types"
+	"strings"
+
+	"code.wuban.net.cn/cmpchain/ethcrypto/crypto"
+)
+
+type Error struct {
+	Name   string
+	Inputs Arguments
+	str    string
+
+	// Sig contains the string signature according to the ABI spec.
+	// e.g. error foo(uint32 a, int b) = "foo(uint32,int256)"
+	// Please note that "int" is substitute for its canonical representation "int256"
+	Sig string
+
+	// ID returns the canonical representation of the error's signature used by the
+	// abi definition to identify event names and types.
+	ID metatypes.Hash
+}
+
+func NewError(name string, inputs Arguments) Error {
+	// sanitize inputs to remove inputs without names
+	// and precompute string and sig representation.
+	names := make([]string, len(inputs))
+	types := make([]string, len(inputs))
+	for i, input := range inputs {
+		if input.Name == "" {
+			inputs[i] = Argument{
+				Name:    fmt.Sprintf("arg%d", i),
+				Indexed: input.Indexed,
+				Type:    input.Type,
+			}
+		} else {
+			inputs[i] = input
+		}
+		// string representation
+		names[i] = fmt.Sprintf("%v %v", input.Type, inputs[i].Name)
+		if input.Indexed {
+			names[i] = fmt.Sprintf("%v indexed %v", input.Type, inputs[i].Name)
+		}
+		// sig representation
+		types[i] = input.Type.String()
+	}
+
+	str := fmt.Sprintf("error %v(%v)", name, strings.Join(names, ", "))
+	sig := fmt.Sprintf("%v(%v)", name, strings.Join(types, ","))
+	id := metatypes.BytesToHash(crypto.Keccak256([]byte(sig)))
+
+	return Error{
+		Name:   name,
+		Inputs: inputs,
+		str:    str,
+		Sig:    sig,
+		ID:     id,
+	}
+}
+
+func (e Error) String() string {
+	return e.str
+}
+
+func (e *Error) Unpack(data []byte) (interface{}, error) {
+	if len(data) < 4 {
+		return "", fmt.Errorf("insufficient data for unpacking: have %d, want at least 4", len(data))
+	}
+	if !bytes.Equal(data[:4], e.ID[:4]) {
+		return "", fmt.Errorf("invalid identifier, have %#x want %#x", data[:4], e.ID[:4])
+	}
+	return e.Inputs.Unpack(data[4:])
+}

accounts/abi/error_handling.go

+// Copyright 2016 The go-ethereum Authors
+// This file is part of the go-ethereum library.
+//
+// The go-ethereum library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The go-ethereum library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
+
+package abi
+
+import (
+	"errors"
+	"fmt"
+	"reflect"
+)
+
+var (
+	errBadBool   = errors.New("abi: improperly encoded boolean value")
+	errBadUint8  = errors.New("abi: improperly encoded uint8 value")
+	errBadUint16 = errors.New("abi: improperly encoded uint16 value")
+	errBadUint32 = errors.New("abi: improperly encoded uint32 value")
+	errBadUint64 = errors.New("abi: improperly encoded uint64 value")
+	errBadInt8   = errors.New("abi: improperly encoded int8 value")
+	errBadInt16  = errors.New("abi: improperly encoded int16 value")
+	errBadInt32  = errors.New("abi: improperly encoded int32 value")
+	errBadInt64  = errors.New("abi: improperly encoded int64 value")
+)
+
+// formatSliceString formats the reflection kind with the given slice size
+// and returns a formatted string representation.
+func formatSliceString(kind reflect.Kind, sliceSize int) string {
+	if sliceSize == -1 {
+		return fmt.Sprintf("[]%v", kind)
+	}
+	return fmt.Sprintf("[%d]%v", sliceSize, kind)
+}
+
+// sliceTypeCheck checks that the given slice can by assigned to the reflection
+// type in t.
+func sliceTypeCheck(t Type, val reflect.Value) error {
+	if val.Kind() != reflect.Slice && val.Kind() != reflect.Array {
+		return typeErr(formatSliceString(t.GetType().Kind(), t.Size), val.Type())
+	}
+
+	if t.T == ArrayTy && val.Len() != t.Size {
+		return typeErr(formatSliceString(t.Elem.GetType().Kind(), t.Size), formatSliceString(val.Type().Elem().Kind(), val.Len()))
+	}
+
+	if t.Elem.T == SliceTy || t.Elem.T == ArrayTy {
+		if val.Len() > 0 {
+			return sliceTypeCheck(*t.Elem, val.Index(0))
+		}
+	}
+
+	if val.Type().Elem().Kind() != t.Elem.GetType().Kind() {
+		return typeErr(formatSliceString(t.Elem.GetType().Kind(), t.Size), val.Type())
+	}
+	return nil
+}
+
+// typeCheck checks that the given reflection value can be assigned to the reflection
+// type in t.
+func typeCheck(t Type, value reflect.Value) error {
+	if t.T == SliceTy || t.T == ArrayTy {
+		return sliceTypeCheck(t, value)
+	}
+
+	// Check base type validity. Element types will be checked later on.
+	if t.GetType().Kind() != value.Kind() {
+		return typeErr(t.GetType().Kind(), value.Kind())
+	} else if t.T == FixedBytesTy && t.Size != value.Len() {
+		return typeErr(t.GetType(), value.Type())
+	} else {
+		return nil
+	}
+}
+
+// typeErr returns a formatted type casting error.
+func typeErr(expected, got interface{}) error {
+	return fmt.Errorf("abi: cannot use %v as type %v as argument", got, expected)
+}

accounts/abi/event.go

+// Copyright 2016 The go-ethereum Authors
+// This file is part of the go-ethereum library.
+//
+// The go-ethereum library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The go-ethereum library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
+
+package abi
+
+import (
+	"fmt"
+	"strings"
+
+	"code.wuban.net.cn/cmpchain/ethcrypto/crypto"
+	metatypes "github.com/CaduceusMetaverseProtocol/MetaTypes/types"
+)
+
+// Event is an event potentially triggered by the EVM's LOG mechanism. The Event
+// holds type information (inputs) about the yielded output. Anonymous events
+// don't get the signature canonical representation as the first LOG topic.
+type Event struct {
+	// Name is the event name used for internal representation. It's derived from
+	// the raw name and a suffix will be added in the case of event overloading.
+	//
+	// e.g.
+	// These are two events that have the same name:
+	// * foo(int,int)
+	// * foo(uint,uint)
+	// The event name of the first one will be resolved as foo while the second one
+	// will be resolved as foo0.
+	Name string
+
+	// RawName is the raw event name parsed from ABI.
+	RawName   string
+	Anonymous bool
+	Inputs    Arguments
+	str       string
+
+	// Sig contains the string signature according to the ABI spec.
+	// e.g.	 event foo(uint32 a, int b) = "foo(uint32,int256)"
+	// Please note that "int" is substitute for its canonical representation "int256"
+	Sig string
+
+	// ID returns the canonical representation of the event's signature used by the
+	// abi definition to identify event names and types.
+	ID metatypes.Hash
+}
+
+// NewEvent creates a new Event.
+// It sanitizes the input arguments to remove unnamed arguments.
+// It also precomputes the id, signature and string representation
+// of the event.
+func NewEvent(name, rawName string, anonymous bool, inputs Arguments) Event {
+	// sanitize inputs to remove inputs without names
+	// and precompute string and sig representation.
+	names := make([]string, len(inputs))
+	types := make([]string, len(inputs))
+	for i, input := range inputs {
+		if input.Name == "" {
+			inputs[i] = Argument{
+				Name:    fmt.Sprintf("arg%d", i),
+				Indexed: input.Indexed,
+				Type:    input.Type,
+			}
+		} else {
+			inputs[i] = input
+		}
+		// string representation
+		names[i] = fmt.Sprintf("%v %v", input.Type, inputs[i].Name)
+		if input.Indexed {
+			names[i] = fmt.Sprintf("%v indexed %v", input.Type, inputs[i].Name)
+		}
+		// sig representation
+		types[i] = input.Type.String()
+	}
+
+	str := fmt.Sprintf("event %v(%v)", rawName, strings.Join(names, ", "))
+	sig := fmt.Sprintf("%v(%v)", rawName, strings.Join(types, ","))
+	id := metatypes.BytesToHash(crypto.Keccak256([]byte(sig)))
+
+	return Event{
+		Name:      name,
+		RawName:   rawName,
+		Anonymous: anonymous,
+		Inputs:    inputs,
+		str:       str,
+		Sig:       sig,
+		ID:        id,
+	}
+}
+
+func (e Event) String() string {
+	return e.str
+}

accounts/abi/method.go

+// Copyright 2015 The go-ethereum Authors
+// This file is part of the go-ethereum library.
+//
+// The go-ethereum library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The go-ethereum library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
+
+package abi
+
+import (
+	"fmt"
+	"strings"
+
+	"code.wuban.net.cn/cmpchain/ethcrypto/crypto"
+)
+
+// FunctionType represents different types of functions a contract might have.
+type FunctionType int
+
+const (
+	// Constructor represents the constructor of the contract.
+	// The constructor function is called while deploying a contract.
+	Constructor FunctionType = iota
+	// Fallback represents the fallback function.
+	// This function is executed if no other function matches the given function
+	// signature and no receive function is specified.
+	Fallback
+	// Receive represents the receive function.
+	// This function is executed on plain Ether transfers.
+	Receive
+	// Function represents a normal function.
+	Function
+)
+
+// Method represents a callable given a `Name` and whether the method is a constant.
+// If the method is `Const` no transaction needs to be created for this
+// particular Method call. It can easily be simulated using a local VM.
+// For example a `Balance()` method only needs to retrieve something
+// from the storage and therefore requires no Tx to be sent to the
+// network. A method such as `Transact` does require a Tx and thus will
+// be flagged `false`.
+// Input specifies the required input parameters for this gives method.
+type Method struct {
+	// Name is the method name used for internal representation. It's derived from
+	// the raw name and a suffix will be added in the case of a function overload.
+	//
+	// e.g.
+	// These are two functions that have the same name:
+	// * foo(int,int)
+	// * foo(uint,uint)
+	// The method name of the first one will be resolved as foo while the second one
+	// will be resolved as foo0.
+	Name    string
+	RawName string // RawName is the raw method name parsed from ABI
+
+	// Type indicates whether the method is a
+	// special fallback introduced in solidity v0.6.0
+	Type FunctionType
+
+	// StateMutability indicates the mutability state of method,
+	// the default value is nonpayable. It can be empty if the abi
+	// is generated by legacy compiler.
+	StateMutability string
+
+	// Legacy indicators generated by compiler before v0.6.0
+	Constant bool
+	Payable  bool
+
+	Inputs  Arguments
+	Outputs Arguments
+	str     string
+	// Sig returns the methods string signature according to the ABI spec.
+	// e.g.		function foo(uint32 a, int b) = "foo(uint32,int256)"
+	// Please note that "int" is substitute for its canonical representation "int256"
+	Sig string
+	// ID returns the canonical representation of the method's signature used by the
+	// abi definition to identify method names and types.
+	ID []byte
+}
+
+// NewMethod creates a new Method.
+// A method should always be created using NewMethod.
+// It also precomputes the sig representation and the string representation
+// of the method.
+func NewMethod(name string, rawName string, funType FunctionType, mutability string, isConst, isPayable bool, inputs Arguments, outputs Arguments) Method {
+	var (
+		types       = make([]string, len(inputs))
+		inputNames  = make([]string, len(inputs))
+		outputNames = make([]string, len(outputs))
+	)
+	for i, input := range inputs {
+		inputNames[i] = fmt.Sprintf("%v %v", input.Type, input.Name)
+		types[i] = input.Type.String()
+	}
+	for i, output := range outputs {
+		outputNames[i] = output.Type.String()
+		if len(output.Name) > 0 {
+			outputNames[i] += fmt.Sprintf(" %v", output.Name)
+		}
+	}
+	// calculate the signature and method id. Note only function
+	// has meaningful signature and id.
+	var (
+		sig string
+		id  []byte
+	)
+	if funType == Function {
+		sig = fmt.Sprintf("%v(%v)", rawName, strings.Join(types, ","))
+		id = crypto.Keccak256([]byte(sig))[:4]
+	}
+	identity := fmt.Sprintf("function %v", rawName)
+	switch funType {
+	case Fallback:
+		identity = "fallback"
+	case Receive:
+		identity = "receive"
+	case Constructor:
+		identity = "constructor"
+	}
+	var str string
+	// Extract meaningful state mutability of solidity method.
+	// If it's empty string or default value "nonpayable", never print it.
+	if mutability == "" || mutability == "nonpayable" {
+		str = fmt.Sprintf("%v(%v) returns(%v)", identity, strings.Join(inputNames, ", "), strings.Join(outputNames, ", "))
+	} else {
+		str = fmt.Sprintf("%v(%v) %s returns(%v)", identity, strings.Join(inputNames, ", "), mutability, strings.Join(outputNames, ", "))
+	}
+
+	return Method{
+		Name:            name,
+		RawName:         rawName,
+		Type:            funType,
+		StateMutability: mutability,
+		Constant:        isConst,
+		Payable:         isPayable,
+		Inputs:          inputs,
+		Outputs:         outputs,
+		str:             str,
+		Sig:             sig,
+		ID:              id,
+	}
+}
+
+func (method Method) String() string {
+	return method.str
+}
+
+// IsConstant returns the indicator whether the method is read-only.
+func (method Method) IsConstant() bool {
+	return method.StateMutability == "view" || method.StateMutability == "pure" || method.Constant
+}
+
+// IsPayable returns the indicator whether the method can process
+// plain ether transfers.
+func (method Method) IsPayable() bool {
+	return method.StateMutability == "payable" || method.Payable
+}

accounts/abi/method_test.go

+// Copyright 2018 The go-ethereum Authors
+// This file is part of the go-ethereum library.
+//
+// The go-ethereum library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The go-ethereum library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
+
+package abi
+
+import (
+	"strings"
+	"testing"
+)
+
+const methoddata = `
+[
+	{"type": "function", "name": "balance", "stateMutability": "view"},
+	{"type": "function", "name": "send", "inputs": [{ "name": "amount", "type": "uint256" }]},
+	{"type": "function", "name": "transfer", "inputs": [{"name": "from", "type": "address"}, {"name": "to", "type": "address"}, {"name": "value", "type": "uint256"}], "outputs": [{"name": "success", "type": "bool"}]},
+	{"constant":false,"inputs":[{"components":[{"name":"x","type":"uint256"},{"name":"y","type":"uint256"}],"name":"a","type":"tuple"}],"name":"tuple","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},
+	{"constant":false,"inputs":[{"components":[{"name":"x","type":"uint256"},{"name":"y","type":"uint256"}],"name":"a","type":"tuple[]"}],"name":"tupleSlice","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},
+	{"constant":false,"inputs":[{"components":[{"name":"x","type":"uint256"},{"name":"y","type":"uint256"}],"name":"a","type":"tuple[5]"}],"name":"tupleArray","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},
+	{"constant":false,"inputs":[{"components":[{"name":"x","type":"uint256"},{"name":"y","type":"uint256"}],"name":"a","type":"tuple[5][]"}],"name":"complexTuple","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},
+	{"stateMutability":"nonpayable","type":"fallback"},
+	{"stateMutability":"payable","type":"receive"}
+]`
+
+func TestMethodString(t *testing.T) {
+	t.Parallel()
+	var table = []struct {
+		method      string
+		expectation string
+	}{
+		{
+			method:      "balance",
+			expectation: "function balance() view returns()",
+		},
+		{
+			method:      "send",
+			expectation: "function send(uint256 amount) returns()",
+		},
+		{
+			method:      "transfer",
+			expectation: "function transfer(address from, address to, uint256 value) returns(bool success)",
+		},
+		{
+			method:      "tuple",
+			expectation: "function tuple((uint256,uint256) a) returns()",
+		},
+		{
+			method:      "tupleArray",
+			expectation: "function tupleArray((uint256,uint256)[5] a) returns()",
+		},
+		{
+			method:      "tupleSlice",
+			expectation: "function tupleSlice((uint256,uint256)[] a) returns()",
+		},
+		{
+			method:      "complexTuple",
+			expectation: "function complexTuple((uint256,uint256)[5][] a) returns()",
+		},
+		{
+			method:      "fallback",
+			expectation: "fallback() returns()",
+		},
+		{
+			method:      "receive",
+			expectation: "receive() payable returns()",
+		},
+	}
+
+	abi, err := JSON(strings.NewReader(methoddata))
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	for _, test := range table {
+		var got string
+		switch test.method {
+		case "fallback":
+			got = abi.Fallback.String()
+		case "receive":
+			got = abi.Receive.String()
+		default:
+			got = abi.Methods[test.method].String()
+		}
+		if got != test.expectation {
+			t.Errorf("expected string to be %s, got %s", test.expectation, got)
+		}
+	}
+}
+
+func TestMethodSig(t *testing.T) {
+	t.Parallel()
+	var cases = []struct {
+		method string
+		expect string
+	}{
+		{
+			method: "balance",
+			expect: "balance()",
+		},
+		{
+			method: "send",
+			expect: "send(uint256)",
+		},
+		{
+			method: "transfer",
+			expect: "transfer(address,address,uint256)",
+		},
+		{
+			method: "tuple",
+			expect: "tuple((uint256,uint256))",
+		},
+		{
+			method: "tupleArray",
+			expect: "tupleArray((uint256,uint256)[5])",
+		},
+		{
+			method: "tupleSlice",
+			expect: "tupleSlice((uint256,uint256)[])",
+		},
+		{
+			method: "complexTuple",
+			expect: "complexTuple((uint256,uint256)[5][])",
+		},
+	}
+	abi, err := JSON(strings.NewReader(methoddata))
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	for _, test := range cases {
+		got := abi.Methods[test.method].Sig
+		if got != test.expect {
+			t.Errorf("expected string to be %s, got %s", test.expect, got)
+		}
+	}
+}

accounts/abi/pack.go

+// Copyright 2016 The go-ethereum Authors
+// This file is part of the go-ethereum library.
+//
+// The go-ethereum library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The go-ethereum library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
+
+package abi
+
+import (
+	"errors"
+	"fmt"
+	metatypes "github.com/CaduceusMetaverseProtocol/MetaTypes/types"
+	"math/big"
+	"reflect"
+
+	"github.com/CaduceusMetaverseProtocol/MetaTypes/common/math"
+)
+
+// packBytesSlice packs the given bytes as [L, V] as the canonical representation
+// bytes slice.
+func packBytesSlice(bytes []byte, l int) []byte {
+	len := packNum(reflect.ValueOf(l))
+	return append(len, metatypes.RightPadBytes(bytes, (l+31)/32*32)...)
+}
+
+// packElement packs the given reflect value according to the abi specification in
+// t.
+func packElement(t Type, reflectValue reflect.Value) ([]byte, error) {
+	switch t.T {
+	case IntTy, UintTy:
+		return packNum(reflectValue), nil
+	case StringTy:
+		return packBytesSlice([]byte(reflectValue.String()), reflectValue.Len()), nil
+	case AddressTy:
+		if reflectValue.Kind() == reflect.Array {
+			reflectValue = mustArrayToByteSlice(reflectValue)
+		}
+
+		return metatypes.LeftPadBytes(reflectValue.Bytes(), 32), nil
+	case BoolTy:
+		if reflectValue.Bool() {
+			return math.PaddedBigBytes(metatypes.Big1, 32), nil
+		}
+		return math.PaddedBigBytes(metatypes.Big0, 32), nil
+	case BytesTy:
+		if reflectValue.Kind() == reflect.Array {
+			reflectValue = mustArrayToByteSlice(reflectValue)
+		}
+		if reflectValue.Type() != reflect.TypeOf([]byte{}) {
+			return []byte{}, errors.New("bytes type is neither slice nor array")
+		}
+		return packBytesSlice(reflectValue.Bytes(), reflectValue.Len()), nil
+	case FixedBytesTy, FunctionTy:
+		if reflectValue.Kind() == reflect.Array {
+			reflectValue = mustArrayToByteSlice(reflectValue)
+		}
+		return metatypes.RightPadBytes(reflectValue.Bytes(), 32), nil
+	default:
+		return []byte{}, fmt.Errorf("could not pack element, unknown type: %v", t.T)
+	}
+}
+
+// packNum packs the given number (using the reflect value) and will cast it to appropriate number representation.
+func packNum(value reflect.Value) []byte {
+	switch kind := value.Kind(); kind {
+	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
+		return math.U256Bytes(new(big.Int).SetUint64(value.Uint()))
+	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
+		return math.U256Bytes(big.NewInt(value.Int()))
+	case reflect.Ptr:
+		return math.U256Bytes(new(big.Int).Set(value.Interface().(*big.Int)))
+	default:
+		panic("abi: fatal error")
+	}
+}

accounts/abi/pack_test.go

+// Copyright 2017 The go-ethereum Authors
+// This file is part of the go-ethereum library.
+//
+// The go-ethereum library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The go-ethereum library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
+
+package abi
+
+import (
+	"bytes"
+	"encoding/hex"
+	"fmt"
+	metatypes "github.com/CaduceusMetaverseProtocol/MetaTypes/types"
+	"math"
+	"math/big"
+	"reflect"
+	"strconv"
+	"strings"
+	"testing"
+)
+
+// TestPack tests the general pack/unpack tests in packing_test.go
+func TestPack(t *testing.T) {
+	t.Parallel()
+	for i, test := range packUnpackTests {
+		t.Run(strconv.Itoa(i), func(t *testing.T) {
+			t.Parallel()
+			encb, err := hex.DecodeString(test.packed)
+			if err != nil {
+				t.Fatalf("invalid hex %s: %v", test.packed, err)
+			}
+			inDef := fmt.Sprintf(`[{ "name" : "method", "type": "function", "inputs": %s}]`, test.def)
+			inAbi, err := JSON(strings.NewReader(inDef))
+			if err != nil {
+				t.Fatalf("invalid ABI definition %s, %v", inDef, err)
+			}
+			var packed []byte
+			packed, err = inAbi.Pack("method", test.unpacked)
+
+			if err != nil {
+				t.Fatalf("test %d (%v) failed: %v", i, test.def, err)
+			}
+			if !reflect.DeepEqual(packed[4:], encb) {
+				t.Errorf("test %d (%v) failed: expected %v, got %v", i, test.def, encb, packed[4:])
+			}
+		})
+	}
+}
+
+func TestMethodPack(t *testing.T) {
+	t.Parallel()
+	abi, err := JSON(strings.NewReader(jsondata))
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	sig := abi.Methods["slice"].ID
+	sig = append(sig, metatypes.LeftPadBytes([]byte{1}, 32)...)
+	sig = append(sig, metatypes.LeftPadBytes([]byte{2}, 32)...)
+
+	packed, err := abi.Pack("slice", []uint32{1, 2})
+	if err != nil {
+		t.Error(err)
+	}
+
+	if !bytes.Equal(packed, sig) {
+		t.Errorf("expected %x got %x", sig, packed)
+	}
+
+	var addrA, addrB = metatypes.Address{1}, metatypes.Address{2}
+	sig = abi.Methods["sliceAddress"].ID
+	sig = append(sig, metatypes.LeftPadBytes([]byte{32}, 32)...)
+	sig = append(sig, metatypes.LeftPadBytes([]byte{2}, 32)...)
+	sig = append(sig, metatypes.LeftPadBytes(addrA[:], 32)...)
+	sig = append(sig, metatypes.LeftPadBytes(addrB[:], 32)...)
+
+	packed, err = abi.Pack("sliceAddress", []metatypes.Address{addrA, addrB})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if !bytes.Equal(packed, sig) {
+		t.Errorf("expected %x got %x", sig, packed)
+	}
+
+	var addrC, addrD = metatypes.Address{3}, metatypes.Address{4}
+	sig = abi.Methods["sliceMultiAddress"].ID
+	sig = append(sig, metatypes.LeftPadBytes([]byte{64}, 32)...)
+	sig = append(sig, metatypes.LeftPadBytes([]byte{160}, 32)...)
+	sig = append(sig, metatypes.LeftPadBytes([]byte{2}, 32)...)
+	sig = append(sig, metatypes.LeftPadBytes(addrA[:], 32)...)
+	sig = append(sig, metatypes.LeftPadBytes(addrB[:], 32)...)
+	sig = append(sig, metatypes.LeftPadBytes([]byte{2}, 32)...)
+	sig = append(sig, metatypes.LeftPadBytes(addrC[:], 32)...)
+	sig = append(sig, metatypes.LeftPadBytes(addrD[:], 32)...)
+
+	packed, err = abi.Pack("sliceMultiAddress", []metatypes.Address{addrA, addrB}, []metatypes.Address{addrC, addrD})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if !bytes.Equal(packed, sig) {
+		t.Errorf("expected %x got %x", sig, packed)
+	}
+
+	sig = abi.Methods["slice256"].ID
+	sig = append(sig, metatypes.LeftPadBytes([]byte{1}, 32)...)
+	sig = append(sig, metatypes.LeftPadBytes([]byte{2}, 32)...)
+
+	packed, err = abi.Pack("slice256", []*big.Int{big.NewInt(1), big.NewInt(2)})
+	if err != nil {
+		t.Error(err)
+	}
+
+	if !bytes.Equal(packed, sig) {
+		t.Errorf("expected %x got %x", sig, packed)
+	}
+
+	a := [2][2]*big.Int{{big.NewInt(1), big.NewInt(1)}, {big.NewInt(2), big.NewInt(0)}}
+	sig = abi.Methods["nestedArray"].ID
+	sig = append(sig, metatypes.LeftPadBytes([]byte{1}, 32)...)
+	sig = append(sig, metatypes.LeftPadBytes([]byte{1}, 32)...)
+	sig = append(sig, metatypes.LeftPadBytes([]byte{2}, 32)...)
+	sig = append(sig, metatypes.LeftPadBytes([]byte{0}, 32)...)
+	sig = append(sig, metatypes.LeftPadBytes([]byte{0xa0}, 32)...)
+	sig = append(sig, metatypes.LeftPadBytes([]byte{2}, 32)...)
+	sig = append(sig, metatypes.LeftPadBytes(addrC[:], 32)...)
+	sig = append(sig, metatypes.LeftPadBytes(addrD[:], 32)...)
+	packed, err = abi.Pack("nestedArray", a, []metatypes.Address{addrC, addrD})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if !bytes.Equal(packed, sig) {
+		t.Errorf("expected %x got %x", sig, packed)
+	}
+
+	sig = abi.Methods["nestedArray2"].ID
+	sig = append(sig, metatypes.LeftPadBytes([]byte{0x20}, 32)...)
+	sig = append(sig, metatypes.LeftPadBytes([]byte{0x40}, 32)...)
+	sig = append(sig, metatypes.LeftPadBytes([]byte{0x80}, 32)...)
+	sig = append(sig, metatypes.LeftPadBytes([]byte{1}, 32)...)
+	sig = append(sig, metatypes.LeftPadBytes([]byte{1}, 32)...)
+	sig = append(sig, metatypes.LeftPadBytes([]byte{1}, 32)...)
+	sig = append(sig, metatypes.LeftPadBytes([]byte{1}, 32)...)
+	packed, err = abi.Pack("nestedArray2", [2][]uint8{{1}, {1}})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if !bytes.Equal(packed, sig) {
+		t.Errorf("expected %x got %x", sig, packed)
+	}
+
+	sig = abi.Methods["nestedSlice"].ID
+	sig = append(sig, metatypes.LeftPadBytes([]byte{0x20}, 32)...)
+	sig = append(sig, metatypes.LeftPadBytes([]byte{0x02}, 32)...)
+	sig = append(sig, metatypes.LeftPadBytes([]byte{0x40}, 32)...)
+	sig = append(sig, metatypes.LeftPadBytes([]byte{0xa0}, 32)...)
+	sig = append(sig, metatypes.LeftPadBytes([]byte{2}, 32)...)
+	sig = append(sig, metatypes.LeftPadBytes([]byte{1}, 32)...)
+	sig = append(sig, metatypes.LeftPadBytes([]byte{2}, 32)...)
+	sig = append(sig, metatypes.LeftPadBytes([]byte{2}, 32)...)
+	sig = append(sig, metatypes.LeftPadBytes([]byte{1}, 32)...)
+	sig = append(sig, metatypes.LeftPadBytes([]byte{2}, 32)...)
+	packed, err = abi.Pack("nestedSlice", [][]uint8{{1, 2}, {1, 2}})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if !bytes.Equal(packed, sig) {
+		t.Errorf("expected %x got %x", sig, packed)
+	}
+}
+
+func TestPackNumber(t *testing.T) {
+	t.Parallel()
+	tests := []struct {
+		value  reflect.Value
+		packed []byte
+	}{
+		// Protocol limits
+		{reflect.ValueOf(0), metatypes.Hex2Bytes("0000000000000000000000000000000000000000000000000000000000000000")},
+		{reflect.ValueOf(1), metatypes.Hex2Bytes("0000000000000000000000000000000000000000000000000000000000000001")},
+		{reflect.ValueOf(-1), metatypes.Hex2Bytes("ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff")},
+
+		// Type corner cases
+		{reflect.ValueOf(uint8(math.MaxUint8)), metatypes.Hex2Bytes("00000000000000000000000000000000000000000000000000000000000000ff")},
+		{reflect.ValueOf(uint16(math.MaxUint16)), metatypes.Hex2Bytes("000000000000000000000000000000000000000000000000000000000000ffff")},
+		{reflect.ValueOf(uint32(math.MaxUint32)), metatypes.Hex2Bytes("00000000000000000000000000000000000000000000000000000000ffffffff")},
+		{reflect.ValueOf(uint64(math.MaxUint64)), metatypes.Hex2Bytes("000000000000000000000000000000000000000000000000ffffffffffffffff")},
+
+		{reflect.ValueOf(int8(math.MaxInt8)), metatypes.Hex2Bytes("000000000000000000000000000000000000000000000000000000000000007f")},
+		{reflect.ValueOf(int16(math.MaxInt16)), metatypes.Hex2Bytes("0000000000000000000000000000000000000000000000000000000000007fff")},
+		{reflect.ValueOf(int32(math.MaxInt32)), metatypes.Hex2Bytes("000000000000000000000000000000000000000000000000000000007fffffff")},
+		{reflect.ValueOf(int64(math.MaxInt64)), metatypes.Hex2Bytes("0000000000000000000000000000000000000000000000007fffffffffffffff")},
+
+		{reflect.ValueOf(int8(math.MinInt8)), metatypes.Hex2Bytes("ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff80")},
+		{reflect.ValueOf(int16(math.MinInt16)), metatypes.Hex2Bytes("ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff8000")},
+		{reflect.ValueOf(int32(math.MinInt32)), metatypes.Hex2Bytes("ffffffffffffffffffffffffffffffffffffffffffffffffffffffff80000000")},
+		{reflect.ValueOf(int64(math.MinInt64)), metatypes.Hex2Bytes("ffffffffffffffffffffffffffffffffffffffffffffffff8000000000000000")},
+	}
+	for i, tt := range tests {
+		packed := packNum(tt.value)
+		if !bytes.Equal(packed, tt.packed) {
+			t.Errorf("test %d: pack mismatch: have %x, want %x", i, packed, tt.packed)
+		}
+	}
+}

accounts/abi/reflect.go

+// Copyright 2016 The go-ethereum Authors
+// This file is part of the go-ethereum library.
+//
+// The go-ethereum library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The go-ethereum library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
+
+package abi
+
+import (
+	"errors"
+	"fmt"
+	"math/big"
+	"reflect"
+	"strings"
+)
+
+// ConvertType converts an interface of a runtime type into an interface of the
+// given type, e.g. turn this code:
+//
+//	var fields []reflect.StructField
+//
+//	fields = append(fields, reflect.StructField{
+//			Name: "X",
+//			Type: reflect.TypeOf(new(big.Int)),
+//			Tag:  reflect.StructTag("json:\"" + "x" + "\""),
+//	})
+//
+// into:
+//
+//	type TupleT struct { X *big.Int }
+func ConvertType(in interface{}, proto interface{}) interface{} {
+	protoType := reflect.TypeOf(proto)
+	if reflect.TypeOf(in).ConvertibleTo(protoType) {
+		return reflect.ValueOf(in).Convert(protoType).Interface()
+	}
+	// Use set as a last ditch effort
+	if err := set(reflect.ValueOf(proto), reflect.ValueOf(in)); err != nil {
+		panic(err)
+	}
+	return proto
+}
+
+// indirect recursively dereferences the value until it either gets the value
+// or finds a big.Int
+func indirect(v reflect.Value) reflect.Value {
+	if v.Kind() == reflect.Ptr && v.Elem().Type() != reflect.TypeOf(big.Int{}) {
+		return indirect(v.Elem())
+	}
+	return v
+}
+
+// reflectIntType returns the reflect using the given size and
+// unsignedness.
+func reflectIntType(unsigned bool, size int) reflect.Type {
+	if unsigned {
+		switch size {
+		case 8:
+			return reflect.TypeOf(uint8(0))
+		case 16:
+			return reflect.TypeOf(uint16(0))
+		case 32:
+			return reflect.TypeOf(uint32(0))
+		case 64:
+			return reflect.TypeOf(uint64(0))
+		}
+	}
+	switch size {
+	case 8:
+		return reflect.TypeOf(int8(0))
+	case 16:
+		return reflect.TypeOf(int16(0))
+	case 32:
+		return reflect.TypeOf(int32(0))
+	case 64:
+		return reflect.TypeOf(int64(0))
+	}
+	return reflect.TypeOf(&big.Int{})
+}
+
+// mustArrayToByteSlice creates a new byte slice with the exact same size as value
+// and copies the bytes in value to the new slice.
+func mustArrayToByteSlice(value reflect.Value) reflect.Value {
+	slice := reflect.MakeSlice(reflect.TypeOf([]byte{}), value.Len(), value.Len())
+	reflect.Copy(slice, value)
+	return slice
+}
+
+// set attempts to assign src to dst by either setting, copying or otherwise.
+//
+// set is a bit more lenient when it comes to assignment and doesn't force an as
+// strict ruleset as bare `reflect` does.
+func set(dst, src reflect.Value) error {
+	dstType, srcType := dst.Type(), src.Type()
+	switch {
+	case dstType.Kind() == reflect.Interface && dst.Elem().IsValid() && (dst.Elem().Type().Kind() == reflect.Ptr || dst.Elem().CanSet()):
+		return set(dst.Elem(), src)
+	case dstType.Kind() == reflect.Ptr && dstType.Elem() != reflect.TypeOf(big.Int{}):
+		return set(dst.Elem(), src)
+	case srcType.AssignableTo(dstType) && dst.CanSet():
+		dst.Set(src)
+	case dstType.Kind() == reflect.Slice && srcType.Kind() == reflect.Slice && dst.CanSet():
+		return setSlice(dst, src)
+	case dstType.Kind() == reflect.Array:
+		return setArray(dst, src)
+	case dstType.Kind() == reflect.Struct:
+		return setStruct(dst, src)
+	default:
+		return fmt.Errorf("abi: cannot unmarshal %v in to %v", src.Type(), dst.Type())
+	}
+	return nil
+}
+
+// setSlice attempts to assign src to dst when slices are not assignable by default
+// e.g. src: [][]byte -> dst: [][15]byte
+// setSlice ignores if we cannot copy all of src' elements.
+func setSlice(dst, src reflect.Value) error {
+	slice := reflect.MakeSlice(dst.Type(), src.Len(), src.Len())
+	for i := 0; i < src.Len(); i++ {
+		if err := set(slice.Index(i), src.Index(i)); err != nil {
+			return err
+		}
+	}
+	if dst.CanSet() {
+		dst.Set(slice)
+		return nil
+	}
+	return errors.New("cannot set slice, destination not settable")
+}
+
+func setArray(dst, src reflect.Value) error {
+	if src.Kind() == reflect.Ptr {
+		return set(dst, indirect(src))
+	}
+	array := reflect.New(dst.Type()).Elem()
+	min := src.Len()
+	if src.Len() > dst.Len() {
+		min = dst.Len()
+	}
+	for i := 0; i < min; i++ {
+		if err := set(array.Index(i), src.Index(i)); err != nil {
+			return err
+		}
+	}
+	if dst.CanSet() {
+		dst.Set(array)
+		return nil
+	}
+	return errors.New("cannot set array, destination not settable")
+}
+
+func setStruct(dst, src reflect.Value) error {
+	for i := 0; i < src.NumField(); i++ {
+		srcField := src.Field(i)
+		dstField := dst.Field(i)
+		if !dstField.IsValid() || !srcField.IsValid() {
+			return fmt.Errorf("could not find src field: %v value: %v in destination", srcField.Type().Name(), srcField)
+		}
+		if err := set(dstField, srcField); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+// mapArgNamesToStructFields maps a slice of argument names to struct fields.
+//
+// first round: for each Exportable field that contains a `abi:""` tag and this field name
+// exists in the given argument name list, pair them together.
+//
+// second round: for each argument name that has not been already linked, find what
+// variable is expected to be mapped into, if it exists and has not been used, pair them.
+//
+// Note this function assumes the given value is a struct value.
+func mapArgNamesToStructFields(argNames []string, value reflect.Value) (map[string]string, error) {
+	typ := value.Type()
+
+	abi2struct := make(map[string]string)
+	struct2abi := make(map[string]string)
+
+	// first round ~~~
+	for i := 0; i < typ.NumField(); i++ {
+		structFieldName := typ.Field(i).Name
+
+		// skip private struct fields.
+		if structFieldName[:1] != strings.ToUpper(structFieldName[:1]) {
+			continue
+		}
+		// skip fields that have no abi:"" tag.
+		tagName, ok := typ.Field(i).Tag.Lookup("abi")
+		if !ok {
+			continue
+		}
+		// check if tag is empty.
+		if tagName == "" {
+			return nil, fmt.Errorf("struct: abi tag in '%s' is empty", structFieldName)
+		}
+		// check which argument field matches with the abi tag.
+		found := false
+		for _, arg := range argNames {
+			if arg == tagName {
+				if abi2struct[arg] != "" {
+					return nil, fmt.Errorf("struct: abi tag in '%s' already mapped", structFieldName)
+				}
+				// pair them
+				abi2struct[arg] = structFieldName
+				struct2abi[structFieldName] = arg
+				found = true
+			}
+		}
+		// check if this tag has been mapped.
+		if !found {
+			return nil, fmt.Errorf("struct: abi tag '%s' defined but not found in abi", tagName)
+		}
+	}
+
+	// second round ~~~
+	for _, argName := range argNames {
+		structFieldName := ToCamelCase(argName)
+
+		if structFieldName == "" {
+			return nil, errors.New("abi: purely underscored output cannot unpack to struct")
+		}
+
+		// this abi has already been paired, skip it... unless there exists another, yet unassigned
+		// struct field with the same field name. If so, raise an error:
+		//    abi: [ { "name": "value" } ]
+		//    struct { Value  *big.Int , Value1 *big.Int `abi:"value"`}
+		if abi2struct[argName] != "" {
+			if abi2struct[argName] != structFieldName &&
+				struct2abi[structFieldName] == "" &&
+				value.FieldByName(structFieldName).IsValid() {
+				return nil, fmt.Errorf("abi: multiple variables maps to the same abi field '%s'", argName)
+			}
+			continue
+		}
+
+		// return an error if this struct field has already been paired.
+		if struct2abi[structFieldName] != "" {
+			return nil, fmt.Errorf("abi: multiple outputs mapping to the same struct field '%s'", structFieldName)
+		}
+
+		if value.FieldByName(structFieldName).IsValid() {
+			// pair them
+			abi2struct[argName] = structFieldName
+			struct2abi[structFieldName] = argName
+		} else {
+			// not paired, but annotate as used, to detect cases like
+			//   abi : [ { "name": "value" }, { "name": "_value" } ]
+			//   struct { Value *big.Int }
+			struct2abi[structFieldName] = argName
+		}
+	}
+	return abi2struct, nil
+}

accounts/abi/reflect_test.go

+// Copyright 2019 The go-ethereum Authors
+// This file is part of the go-ethereum library.
+//
+// The go-ethereum library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The go-ethereum library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
+
+package abi
+
+import (
+	"math/big"
+	"reflect"
+	"testing"
+)
+
+type reflectTest struct {
+	name  string
+	args  []string
+	struc interface{}
+	want  map[string]string
+	err   string
+}
+
+var reflectTests = []reflectTest{
+	{
+		name: "OneToOneCorrespondence",
+		args: []string{"fieldA"},
+		struc: struct {
+			FieldA int `abi:"fieldA"`
+		}{},
+		want: map[string]string{
+			"fieldA": "FieldA",
+		},
+	},
+	{
+		name: "MissingFieldsInStruct",
+		args: []string{"fieldA", "fieldB"},
+		struc: struct {
+			FieldA int `abi:"fieldA"`
+		}{},
+		want: map[string]string{
+			"fieldA": "FieldA",
+		},
+	},
+	{
+		name: "MoreFieldsInStructThanArgs",
+		args: []string{"fieldA"},
+		struc: struct {
+			FieldA int `abi:"fieldA"`
+			FieldB int
+		}{},
+		want: map[string]string{
+			"fieldA": "FieldA",
+		},
+	},
+	{
+		name: "MissingFieldInArgs",
+		args: []string{"fieldA"},
+		struc: struct {
+			FieldA int `abi:"fieldA"`
+			FieldB int `abi:"fieldB"`
+		}{},
+		err: "struct: abi tag 'fieldB' defined but not found in abi",
+	},
+	{
+		name: "NoAbiDescriptor",
+		args: []string{"fieldA"},
+		struc: struct {
+			FieldA int
+		}{},
+		want: map[string]string{
+			"fieldA": "FieldA",
+		},
+	},
+	{
+		name: "NoArgs",
+		args: []string{},
+		struc: struct {
+			FieldA int `abi:"fieldA"`
+		}{},
+		err: "struct: abi tag 'fieldA' defined but not found in abi",
+	},
+	{
+		name: "DifferentName",
+		args: []string{"fieldB"},
+		struc: struct {
+			FieldA int `abi:"fieldB"`
+		}{},
+		want: map[string]string{
+			"fieldB": "FieldA",
+		},
+	},
+	{
+		name: "DifferentName",
+		args: []string{"fieldB"},
+		struc: struct {
+			FieldA int `abi:"fieldB"`
+		}{},
+		want: map[string]string{
+			"fieldB": "FieldA",
+		},
+	},
+	{
+		name: "MultipleFields",
+		args: []string{"fieldA", "fieldB"},
+		struc: struct {
+			FieldA int `abi:"fieldA"`
+			FieldB int `abi:"fieldB"`
+		}{},
+		want: map[string]string{
+			"fieldA": "FieldA",
+			"fieldB": "FieldB",
+		},
+	},
+	{
+		name: "MultipleFieldsABIMissing",
+		args: []string{"fieldA", "fieldB"},
+		struc: struct {
+			FieldA int `abi:"fieldA"`
+			FieldB int
+		}{},
+		want: map[string]string{
+			"fieldA": "FieldA",
+			"fieldB": "FieldB",
+		},
+	},
+	{
+		name: "NameConflict",
+		args: []string{"fieldB"},
+		struc: struct {
+			FieldA int `abi:"fieldB"`
+			FieldB int
+		}{},
+		err: "abi: multiple variables maps to the same abi field 'fieldB'",
+	},
+	{
+		name: "Underscored",
+		args: []string{"_"},
+		struc: struct {
+			FieldA int
+		}{},
+		err: "abi: purely underscored output cannot unpack to struct",
+	},
+	{
+		name: "DoubleMapping",
+		args: []string{"fieldB", "fieldC", "fieldA"},
+		struc: struct {
+			FieldA int `abi:"fieldC"`
+			FieldB int
+		}{},
+		err: "abi: multiple outputs mapping to the same struct field 'FieldA'",
+	},
+	{
+		name: "AlreadyMapped",
+		args: []string{"fieldB", "fieldB"},
+		struc: struct {
+			FieldB int `abi:"fieldB"`
+		}{},
+		err: "struct: abi tag in 'FieldB' already mapped",
+	},
+}
+
+func TestReflectNameToStruct(t *testing.T) {
+	t.Parallel()
+	for _, test := range reflectTests {
+		t.Run(test.name, func(t *testing.T) {
+			t.Parallel()
+			m, err := mapArgNamesToStructFields(test.args, reflect.ValueOf(test.struc))
+			if len(test.err) > 0 {
+				if err == nil || err.Error() != test.err {
+					t.Fatalf("Invalid error: expected %v, got %v", test.err, err)
+				}
+			} else {
+				if err != nil {
+					t.Fatalf("Unexpected error: %v", err)
+				}
+				for fname := range test.want {
+					if m[fname] != test.want[fname] {
+						t.Fatalf("Incorrect value for field %s: expected %v, got %v", fname, test.want[fname], m[fname])
+					}
+				}
+			}
+		})
+	}
+}
+
+func TestConvertType(t *testing.T) {
+	t.Parallel()
+	// Test Basic Struct
+	type T struct {
+		X *big.Int
+		Y *big.Int
+	}
+	// Create on-the-fly structure
+	var fields []reflect.StructField
+	fields = append(fields, reflect.StructField{
+		Name: "X",
+		Type: reflect.TypeOf(new(big.Int)),
+		Tag:  "json:\"" + "x" + "\"",
+	})
+	fields = append(fields, reflect.StructField{
+		Name: "Y",
+		Type: reflect.TypeOf(new(big.Int)),
+		Tag:  "json:\"" + "y" + "\"",
+	})
+	val := reflect.New(reflect.StructOf(fields))
+	val.Elem().Field(0).Set(reflect.ValueOf(big.NewInt(1)))
+	val.Elem().Field(1).Set(reflect.ValueOf(big.NewInt(2)))
+	// ConvertType
+	out := *ConvertType(val.Interface(), new(T)).(*T)
+	if out.X.Cmp(big.NewInt(1)) != 0 {
+		t.Errorf("ConvertType failed, got %v want %v", out.X, big.NewInt(1))
+	}
+	if out.Y.Cmp(big.NewInt(2)) != 0 {
+		t.Errorf("ConvertType failed, got %v want %v", out.Y, big.NewInt(2))
+	}
+	// Slice Type
+	val2 := reflect.MakeSlice(reflect.SliceOf(reflect.StructOf(fields)), 2, 2)
+	val2.Index(0).Field(0).Set(reflect.ValueOf(big.NewInt(1)))
+	val2.Index(0).Field(1).Set(reflect.ValueOf(big.NewInt(2)))
+	val2.Index(1).Field(0).Set(reflect.ValueOf(big.NewInt(3)))
+	val2.Index(1).Field(1).Set(reflect.ValueOf(big.NewInt(4)))
+	out2 := *ConvertType(val2.Interface(), new([]T)).(*[]T)
+	if out2[0].X.Cmp(big.NewInt(1)) != 0 {
+		t.Errorf("ConvertType failed, got %v want %v", out2[0].X, big.NewInt(1))
+	}
+	if out2[0].Y.Cmp(big.NewInt(2)) != 0 {
+		t.Errorf("ConvertType failed, got %v want %v", out2[1].Y, big.NewInt(2))
+	}
+	if out2[1].X.Cmp(big.NewInt(3)) != 0 {
+		t.Errorf("ConvertType failed, got %v want %v", out2[0].X, big.NewInt(1))
+	}
+	if out2[1].Y.Cmp(big.NewInt(4)) != 0 {
+		t.Errorf("ConvertType failed, got %v want %v", out2[1].Y, big.NewInt(2))
+	}
+	// Array Type
+	val3 := reflect.New(reflect.ArrayOf(2, reflect.StructOf(fields)))
+	val3.Elem().Index(0).Field(0).Set(reflect.ValueOf(big.NewInt(1)))
+	val3.Elem().Index(0).Field(1).Set(reflect.ValueOf(big.NewInt(2)))
+	val3.Elem().Index(1).Field(0).Set(reflect.ValueOf(big.NewInt(3)))
+	val3.Elem().Index(1).Field(1).Set(reflect.ValueOf(big.NewInt(4)))
+	out3 := *ConvertType(val3.Interface(), new([2]T)).(*[2]T)
+	if out3[0].X.Cmp(big.NewInt(1)) != 0 {
+		t.Errorf("ConvertType failed, got %v want %v", out3[0].X, big.NewInt(1))
+	}
+	if out3[0].Y.Cmp(big.NewInt(2)) != 0 {
+		t.Errorf("ConvertType failed, got %v want %v", out3[1].Y, big.NewInt(2))
+	}
+	if out3[1].X.Cmp(big.NewInt(3)) != 0 {
+		t.Errorf("ConvertType failed, got %v want %v", out3[0].X, big.NewInt(1))
+	}
+	if out3[1].Y.Cmp(big.NewInt(4)) != 0 {
+		t.Errorf("ConvertType failed, got %v want %v", out3[1].Y, big.NewInt(2))
+	}
+}

accounts/abi/selector_parser_test.go

+// Copyright 2022 The go-ethereum Authors
+// This file is part of the go-ethereum library.
+//
+// The go-ethereum library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The go-ethereum library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
+
+package abi
+
+import (
+	"fmt"
+	"log"
+	"reflect"
+	"testing"
+)
+
+func TestParseSelector(t *testing.T) {
+	t.Parallel()
+	mkType := func(types ...interface{}) []ArgumentMarshaling {
+		var result []ArgumentMarshaling
+		for i, typeOrComponents := range types {
+			name := fmt.Sprintf("name%d", i)
+			if typeName, ok := typeOrComponents.(string); ok {
+				result = append(result, ArgumentMarshaling{name, typeName, typeName, nil, false})
+			} else if components, ok := typeOrComponents.([]ArgumentMarshaling); ok {
+				result = append(result, ArgumentMarshaling{name, "tuple", "tuple", components, false})
+			} else if components, ok := typeOrComponents.([][]ArgumentMarshaling); ok {
+				result = append(result, ArgumentMarshaling{name, "tuple[]", "tuple[]", components[0], false})
+			} else {
+				log.Fatalf("unexpected type %T", typeOrComponents)
+			}
+		}
+		return result
+	}
+	tests := []struct {
+		input string
+		name  string
+		args  []ArgumentMarshaling
+	}{
+		{"noargs()", "noargs", []ArgumentMarshaling{}},
+		{"simple(uint256,uint256,uint256)", "simple", mkType("uint256", "uint256", "uint256")},
+		{"other(uint256,address)", "other", mkType("uint256", "address")},
+		{"withArray(uint256[],address[2],uint8[4][][5])", "withArray", mkType("uint256[]", "address[2]", "uint8[4][][5]")},
+		{"singleNest(bytes32,uint8,(uint256,uint256),address)", "singleNest", mkType("bytes32", "uint8", mkType("uint256", "uint256"), "address")},
+		{"multiNest(address,(uint256[],uint256),((address,bytes32),uint256))", "multiNest",
+			mkType("address", mkType("uint256[]", "uint256"), mkType(mkType("address", "bytes32"), "uint256"))},
+		{"arrayNest((uint256,uint256)[],bytes32)", "arrayNest", mkType([][]ArgumentMarshaling{mkType("uint256", "uint256")}, "bytes32")},
+		{"multiArrayNest((uint256,uint256)[],(uint256,uint256)[])", "multiArrayNest",
+			mkType([][]ArgumentMarshaling{mkType("uint256", "uint256")}, [][]ArgumentMarshaling{mkType("uint256", "uint256")})},
+		{"singleArrayNestAndArray((uint256,uint256)[],bytes32[])", "singleArrayNestAndArray",
+			mkType([][]ArgumentMarshaling{mkType("uint256", "uint256")}, "bytes32[]")},
+		{"singleArrayNestWithArrayAndArray((uint256[],address[2],uint8[4][][5])[],bytes32[])", "singleArrayNestWithArrayAndArray",
+			mkType([][]ArgumentMarshaling{mkType("uint256[]", "address[2]", "uint8[4][][5]")}, "bytes32[]")},
+	}
+	for i, tt := range tests {
+		selector, err := ParseSelector(tt.input)
+		if err != nil {
+			t.Errorf("test %d: failed to parse selector '%v': %v", i, tt.input, err)
+		}
+		if selector.Name != tt.name {
+			t.Errorf("test %d: unexpected function name: '%s' != '%s'", i, selector.Name, tt.name)
+		}
+
+		if selector.Type != "function" {
+			t.Errorf("test %d: unexpected type: '%s' != '%s'", i, selector.Type, "function")
+		}
+		if !reflect.DeepEqual(selector.Inputs, tt.args) {
+			t.Errorf("test %d: unexpected args: '%v' != '%v'", i, selector.Inputs, tt.args)
+		}
+	}
+}

accounts/abi/utils.go

+// Copyright 2022 The go-ethereum Authors
+// This file is part of the go-ethereum library.
+//
+// The go-ethereum library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The go-ethereum library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
+
+package abi
+
+import "fmt"
+
+// ResolveNameConflict returns the next available name for a given thing.
+// This helper can be used for lots of purposes:
+//
+//   - In solidity function overloading is supported, this function can fix
+//     the name conflicts of overloaded functions.
+//   - In golang binding generation, the parameter(in function, event, error,
+//     and struct definition) name will be converted to camelcase style which
+//     may eventually lead to name conflicts.
+//
+// Name conflicts are mostly resolved by adding number suffix. e.g. if the abi contains
+// Methods "send" and "send1", ResolveNameConflict would return "send2" for input "send".
+func ResolveNameConflict(rawName string, used func(string) bool) string {
+	name := rawName
+	ok := used(name)
+	for idx := 0; ok; idx++ {
+		name = fmt.Sprintf("%s%d", rawName, idx)
+		ok = used(name)
+	}
+	return name
+}