From 78745551c077bf54151202138c2629f288769561 Mon Sep 17 00:00:00 2001 From: Determinant Date: Tue, 15 Sep 2020 23:55:34 -0400 Subject: WIP: geth-tavum --- accounts/abi/argument.go | 365 ----------------------------------------------- 1 file changed, 365 deletions(-) delete mode 100644 accounts/abi/argument.go (limited to 'accounts/abi/argument.go') diff --git a/accounts/abi/argument.go b/accounts/abi/argument.go deleted file mode 100644 index 4dae586..0000000 --- a/accounts/abi/argument.go +++ /dev/null @@ -1,365 +0,0 @@ -// 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 . - -package abi - -import ( - "encoding/json" - "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 - 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.Components) - if err != nil { - return err - } - argument.Name = arg.Name - argument.Indexed = arg.Indexed - - return nil -} - -// LengthNonIndexed returns the number of arguments when not counting 'indexed' ones. Only events -// can ever have 'indexed' arguments, it should always be false on arguments for method input/output -func (arguments Arguments) LengthNonIndexed() int { - out := 0 - for _, arg := range arguments { - if !arg.Indexed { - out++ - } - } - return out -} - -// 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(v interface{}, data []byte) 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) - } - marshalledValues, err := arguments.UnpackValues(data) - if err != nil { - return err - } - if arguments.isTuple() { - return arguments.unpackTuple(v, marshalledValues) - } - return arguments.unpackAtomic(v, marshalledValues[0]) -} - -// UnpackIntoMap performs the operation hexdata -> mapping of argument name to argument value -func (arguments Arguments) UnpackIntoMap(v map[string]interface{}, data []byte) error { - marshalledValues, err := arguments.UnpackValues(data) - if err != nil { - return err - } - - return arguments.unpackIntoMap(v, marshalledValues) -} - -// unpack sets the unmarshalled value to go format. -// Note the dst here must be settable. -func unpack(t *Type, dst interface{}, src interface{}) error { - var ( - dstVal = reflect.ValueOf(dst).Elem() - srcVal = reflect.ValueOf(src) - ) - tuple, typ := false, t - for { - if typ.T == SliceTy || typ.T == ArrayTy { - typ = typ.Elem - continue - } - tuple = typ.T == TupleTy - break - } - if !tuple { - return set(dstVal, srcVal) - } - - // Dereferences interface or pointer wrapper - dstVal = indirectInterfaceOrPtr(dstVal) - - switch t.T { - case TupleTy: - if dstVal.Kind() != reflect.Struct { - return fmt.Errorf("abi: invalid dst value for unpack, want struct, got %s", dstVal.Kind()) - } - fieldmap, err := mapArgNamesToStructFields(t.TupleRawNames, dstVal) - if err != nil { - return err - } - for i, elem := range t.TupleElems { - fname := fieldmap[t.TupleRawNames[i]] - field := dstVal.FieldByName(fname) - if !field.IsValid() { - return fmt.Errorf("abi: field %s can't found in the given value", t.TupleRawNames[i]) - } - if err := unpack(elem, field.Addr().Interface(), srcVal.Field(i).Interface()); err != nil { - return err - } - } - return nil - case SliceTy: - if dstVal.Kind() != reflect.Slice { - return fmt.Errorf("abi: invalid dst value for unpack, want slice, got %s", dstVal.Kind()) - } - slice := reflect.MakeSlice(dstVal.Type(), srcVal.Len(), srcVal.Len()) - for i := 0; i < slice.Len(); i++ { - if err := unpack(t.Elem, slice.Index(i).Addr().Interface(), srcVal.Index(i).Interface()); err != nil { - return err - } - } - dstVal.Set(slice) - case ArrayTy: - if dstVal.Kind() != reflect.Array { - return fmt.Errorf("abi: invalid dst value for unpack, want array, got %s", dstVal.Kind()) - } - array := reflect.New(dstVal.Type()).Elem() - for i := 0; i < array.Len(); i++ { - if err := unpack(t.Elem, array.Index(i).Addr().Interface(), srcVal.Index(i).Interface()); err != nil { - return err - } - } - dstVal.Set(array) - } - return nil -} - -// unpackIntoMap unpacks marshalledValues into the provided map[string]interface{} -func (arguments Arguments) unpackIntoMap(v map[string]interface{}, marshalledValues []interface{}) error { - // Make sure map is not nil - if v == nil { - return fmt.Errorf("abi: cannot unpack into a nil map") - } - - for i, arg := range arguments.NonIndexed() { - v[arg.Name] = marshalledValues[i] - } - return nil -} - -// unpackAtomic unpacks ( hexdata -> go ) a single value -func (arguments Arguments) unpackAtomic(v interface{}, marshalledValues interface{}) error { - if arguments.LengthNonIndexed() == 0 { - return nil - } - argument := arguments.NonIndexed()[0] - elem := reflect.ValueOf(v).Elem() - - if elem.Kind() == reflect.Struct && argument.Type.T != TupleTy { - fieldmap, err := mapArgNamesToStructFields([]string{argument.Name}, elem) - if err != nil { - return err - } - field := elem.FieldByName(fieldmap[argument.Name]) - if !field.IsValid() { - return fmt.Errorf("abi: field %s can't be found in the given value", argument.Name) - } - return unpack(&argument.Type, field.Addr().Interface(), marshalledValues) - } - return unpack(&argument.Type, elem.Addr().Interface(), marshalledValues) -} - -// unpackTuple unpacks ( hexdata -> go ) a batch of values. -func (arguments Arguments) unpackTuple(v interface{}, marshalledValues []interface{}) error { - var ( - value = reflect.ValueOf(v).Elem() - typ = value.Type() - kind = value.Kind() - ) - if err := requireUnpackKind(value, typ, kind, arguments); err != nil { - return err - } - - // If the interface is a struct, get of abi->struct_field mapping - var abi2struct map[string]string - if kind == reflect.Struct { - var ( - argNames []string - err error - ) - for _, arg := range arguments.NonIndexed() { - argNames = append(argNames, arg.Name) - } - abi2struct, err = mapArgNamesToStructFields(argNames, value) - if err != nil { - return err - } - } - for i, arg := range arguments.NonIndexed() { - switch kind { - case reflect.Struct: - 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 := unpack(&arg.Type, field.Addr().Interface(), marshalledValues[i]); err != nil { - return err - } - case reflect.Slice, reflect.Array: - if value.Len() < i { - return fmt.Errorf("abi: insufficient number of arguments for unpack, want %d, got %d", len(arguments), value.Len()) - } - v := value.Index(i) - if err := requireAssignable(v, reflect.ValueOf(marshalledValues[i])); err != nil { - return err - } - if err := unpack(&arg.Type, v.Addr().Interface(), marshalledValues[i]); err != nil { - return err - } - default: - return fmt.Errorf("abi:[2] cannot unmarshal tuple in to %v", typ) - } - } - 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) ([]interface{}, error) { - retval := make([]interface{}, 0, arguments.LengthNonIndexed()) - virtualArgs := 0 - for index, arg := range arguments.NonIndexed() { - marshalledValue, err := toGoType((index+virtualArgs)*32, arg.Type, data) - 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 - } - if err != nil { - return nil, err - } - retval = append(retval, marshalledValue) - } - return retval, nil -} - -// PackValues performs the operation Go format -> Hexdata -// It is the semantic opposite of UnpackValues -func (arguments Arguments) PackValues(args []interface{}) ([]byte, error) { - return arguments.Pack(args...) -} - -// Pack performs the operation Go format -> Hexdata -func (arguments Arguments) Pack(args ...interface{}) ([]byte, error) { - // Make sure arguments match up and pack them - abiArgs := arguments - if len(args) != len(abiArgs) { - return nil, fmt.Errorf("argument count mismatch: %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, "") -} -- cgit v1.2.3