forked from cerc-io/plugeth
Merge pull request #2435 from obscuren/abi-array-fixes
accounts/abi: refactored ABI package
This commit is contained in:
commit
0f722df2d9
@ -48,42 +48,6 @@ func JSON(reader io.Reader) (ABI, error) {
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return abi, nil
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}
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// tests, tests whether the given input would result in a successful
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// call. Checks argument list count and matches input to `input`.
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func (abi ABI) pack(method Method, args ...interface{}) ([]byte, error) {
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// variable input is the output appended at the end of packed
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// output. This is used for strings and bytes types input.
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var variableInput []byte
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var ret []byte
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for i, a := range args {
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input := method.Inputs[i]
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// pack the input
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packed, err := input.Type.pack(a)
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if err != nil {
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return nil, fmt.Errorf("`%s` %v", method.Name, err)
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}
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// check for a slice type (string, bytes, slice)
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if input.Type.T == StringTy || input.Type.T == BytesTy || input.Type.IsSlice {
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// calculate the offset
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offset := len(method.Inputs)*32 + len(variableInput)
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// set the offset
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ret = append(ret, packNum(reflect.ValueOf(offset), UintTy)...)
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// Append the packed output to the variable input. The variable input
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// will be appended at the end of the input.
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variableInput = append(variableInput, packed...)
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} else {
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// append the packed value to the input
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ret = append(ret, packed...)
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}
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}
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// append the variable input at the end of the packed input
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ret = append(ret, variableInput...)
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return ret, nil
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}
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// Pack the given method name to conform the ABI. Method call's data
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// will consist of method_id, args0, arg1, ... argN. Method id consists
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// of 4 bytes and arguments are all 32 bytes.
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@ -102,11 +66,7 @@ func (abi ABI) Pack(name string, args ...interface{}) ([]byte, error) {
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}
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method = m
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}
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// Make sure arguments match up and pack them
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if len(args) != len(method.Inputs) {
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return nil, fmt.Errorf("argument count mismatch: %d for %d", len(args), len(method.Inputs))
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}
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arguments, err := abi.pack(method, args...)
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arguments, err := method.pack(method, args...)
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if err != nil {
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return nil, err
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}
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@ -126,18 +86,21 @@ func toGoSlice(i int, t Argument, output []byte) (interface{}, error) {
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if index+32 > len(output) {
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return nil, fmt.Errorf("abi: cannot marshal in to go slice: insufficient size output %d require %d", len(output), index+32)
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}
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elem := t.Type.Elem
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// first we need to create a slice of the type
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var refSlice reflect.Value
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switch t.Type.T {
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switch elem.T {
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case IntTy, UintTy, BoolTy: // int, uint, bool can all be of type big int.
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refSlice = reflect.ValueOf([]*big.Int(nil))
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case AddressTy: // address must be of slice Address
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refSlice = reflect.ValueOf([]common.Address(nil))
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case HashTy: // hash must be of slice hash
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refSlice = reflect.ValueOf([]common.Hash(nil))
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case FixedBytesTy:
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refSlice = reflect.ValueOf([]byte(nil))
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default: // no other types are supported
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return nil, fmt.Errorf("abi: unsupported slice type %v", t.Type.T)
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return nil, fmt.Errorf("abi: unsupported slice type %v", elem.T)
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}
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// get the offset which determines the start of this array ...
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offset := int(common.BytesToBig(output[index : index+32]).Uint64())
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@ -164,7 +127,7 @@ func toGoSlice(i int, t Argument, output []byte) (interface{}, error) {
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)
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// set inter to the correct type (cast)
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switch t.Type.T {
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switch elem.T {
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case IntTy, UintTy:
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inter = common.BytesToBig(returnOutput)
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case BoolTy:
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@ -186,7 +149,7 @@ func toGoSlice(i int, t Argument, output []byte) (interface{}, error) {
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// argument in T.
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func toGoType(i int, t Argument, output []byte) (interface{}, error) {
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// we need to treat slices differently
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if t.Type.IsSlice {
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if (t.Type.IsSlice || t.Type.IsArray) && t.Type.T != BytesTy && t.Type.T != StringTy && t.Type.T != FixedBytesTy {
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return toGoSlice(i, t, output)
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}
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@ -217,12 +180,33 @@ func toGoType(i int, t Argument, output []byte) (interface{}, error) {
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returnOutput = output[index : index+32]
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}
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// cast bytes to abi return type
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// convert the bytes to whatever is specified by the ABI.
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switch t.Type.T {
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case IntTy:
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return common.BytesToBig(returnOutput), nil
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case UintTy:
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return common.BytesToBig(returnOutput), nil
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case IntTy, UintTy:
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bigNum := common.BytesToBig(returnOutput)
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// If the type is a integer convert to the integer type
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// specified by the ABI.
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switch t.Type.Kind {
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case reflect.Uint8:
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return uint8(bigNum.Uint64()), nil
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case reflect.Uint16:
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return uint16(bigNum.Uint64()), nil
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case reflect.Uint32:
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return uint32(bigNum.Uint64()), nil
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case reflect.Uint64:
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return uint64(bigNum.Uint64()), nil
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case reflect.Int8:
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return int8(bigNum.Int64()), nil
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case reflect.Int16:
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return int16(bigNum.Int64()), nil
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case reflect.Int32:
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return int32(bigNum.Int64()), nil
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case reflect.Int64:
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return int64(bigNum.Int64()), nil
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case reflect.Ptr:
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return bigNum, nil
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}
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case BoolTy:
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return common.BytesToBig(returnOutput).Uint64() > 0, nil
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case AddressTy:
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@ -328,10 +312,12 @@ func set(dst, src reflect.Value, output Argument) error {
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return fmt.Errorf("abi: cannot unmarshal %v in to array of elem %v", src.Type(), dstType.Elem())
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}
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if dst.Len() < output.Type.Size {
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return fmt.Errorf("abi: cannot unmarshal src (len=%d) in to dst (len=%d)", output.Type.Size, dst.Len())
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if dst.Len() < output.Type.SliceSize {
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return fmt.Errorf("abi: cannot unmarshal src (len=%d) in to dst (len=%d)", output.Type.SliceSize, dst.Len())
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}
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reflect.Copy(dst, src)
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case dstType.Kind() == reflect.Interface:
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dst.Set(src)
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default:
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return fmt.Errorf("abi: cannot unmarshal %v in to %v", src.Type(), dst.Type())
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}
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@ -29,66 +29,391 @@ import (
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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 string
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}{
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{"uint", big.NewInt(1), ""},
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{"int", big.NewInt(1), ""},
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{"uint30", big.NewInt(1), ""},
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{"uint30", uint8(1), "abi: cannot use uint8 as type ptr as argument"},
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{"uint16", uint16(1), ""},
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{"uint16", uint8(1), "abi: cannot use uint8 as type uint16 as argument"},
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{"uint16[]", []uint16{1, 2, 3}, ""},
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{"uint16[]", [3]uint16{1, 2, 3}, ""},
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{"uint16[]", []uint32{1, 2, 3}, "abi: cannot use []uint32 as type []uint16 as argument"},
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{"uint16[3]", [3]uint32{1, 2, 3}, "abi: cannot use [3]uint32 as type [3]uint16 as argument"},
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{"uint16[3]", [4]uint16{1, 2, 3}, "abi: cannot use [4]uint16 as type [3]uint16 as argument"},
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{"uint16[3]", []uint16{1, 2, 3}, ""},
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{"uint16[3]", []uint16{1, 2, 3, 4}, "abi: cannot use [4]uint16 as type [3]uint16 as argument"},
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{"address[]", []common.Address{common.Address{1}}, ""},
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{"address[1]", []common.Address{common.Address{1}}, ""},
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{"address[1]", [1]common.Address{common.Address{1}}, ""},
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{"address[2]", [1]common.Address{common.Address{1}}, "abi: cannot use [1]array as type [2]array as argument"},
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{"bytes32", [32]byte{}, ""},
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{"bytes32", [33]byte{}, "abi: cannot use [33]uint8 as type [32]uint8 as argument"},
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{"bytes32", common.Hash{1}, ""},
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{"bytes31", [31]byte{}, ""},
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{"bytes31", [32]byte{}, "abi: cannot use [32]uint8 as type [31]uint8 as argument"},
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{"bytes", []byte{0, 1}, ""},
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{"bytes", [2]byte{0, 1}, ""},
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{"bytes", common.Hash{1}, ""},
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{"string", "hello world", ""},
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{"bytes32[]", [][32]byte{[32]byte{}}, ""},
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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 && len(test.err) == 0 {
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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 && len(test.err) != 0 {
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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 && len(test.err) != 0 && err.Error() != test.err {
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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 TestSimpleMethodUnpack(t *testing.T) {
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for i, test := range []struct {
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def string // definition of the **output** ABI params
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marshalledOutput []byte // evm return data
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expectedOut interface{} // the expected output
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outVar string // the output variable (e.g. uint32, *big.Int, etc)
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err string // empty or error if expected
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}{
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{
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`[ { "type": "uint32" } ]`,
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pad([]byte{1}, 32, true),
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uint32(1),
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"uint32",
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"",
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},
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{
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`[ { "type": "uint32" } ]`,
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pad([]byte{1}, 32, true),
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nil,
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"uint16",
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"abi: cannot unmarshal uint32 in to uint16",
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},
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{
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`[ { "type": "uint17" } ]`,
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pad([]byte{1}, 32, true),
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nil,
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"uint16",
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"abi: cannot unmarshal *big.Int in to uint16",
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},
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{
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`[ { "type": "uint17" } ]`,
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pad([]byte{1}, 32, true),
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big.NewInt(1),
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"*big.Int",
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"",
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},
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{
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`[ { "type": "int32" } ]`,
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pad([]byte{1}, 32, true),
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int32(1),
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"int32",
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"",
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},
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{
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`[ { "type": "int32" } ]`,
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pad([]byte{1}, 32, true),
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nil,
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"int16",
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"abi: cannot unmarshal int32 in to int16",
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},
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{
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`[ { "type": "int17" } ]`,
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pad([]byte{1}, 32, true),
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nil,
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"int16",
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"abi: cannot unmarshal *big.Int in to int16",
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},
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{
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`[ { "type": "int17" } ]`,
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pad([]byte{1}, 32, true),
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big.NewInt(1),
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"*big.Int",
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"",
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},
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{
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`[ { "type": "address" } ]`,
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pad(pad([]byte{1}, 20, false), 32, true),
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common.Address{1},
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"address",
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"",
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},
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{
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`[ { "type": "bytes32" } ]`,
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pad([]byte{1}, 32, false),
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pad([]byte{1}, 32, false),
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"bytes",
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"",
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},
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{
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`[ { "type": "bytes32" } ]`,
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pad([]byte{1}, 32, false),
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pad([]byte{1}, 32, false),
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"hash",
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"",
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},
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{
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`[ { "type": "bytes32" } ]`,
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pad([]byte{1}, 32, false),
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pad([]byte{1}, 32, false),
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"interface",
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"",
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},
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} {
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abiDefinition := fmt.Sprintf(`[{ "name" : "method", "outputs": %s}]`, test.def)
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abi, err := JSON(strings.NewReader(abiDefinition))
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if err != nil {
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t.Errorf("%d failed. %v", i, err)
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continue
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}
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var outvar interface{}
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switch test.outVar {
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case "uint8":
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var v uint8
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err = abi.Unpack(&v, "method", test.marshalledOutput)
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outvar = v
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case "uint16":
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var v uint16
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err = abi.Unpack(&v, "method", test.marshalledOutput)
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outvar = v
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case "uint32":
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var v uint32
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err = abi.Unpack(&v, "method", test.marshalledOutput)
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outvar = v
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case "uint64":
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var v uint64
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err = abi.Unpack(&v, "method", test.marshalledOutput)
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outvar = v
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case "int8":
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var v int8
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err = abi.Unpack(&v, "method", test.marshalledOutput)
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outvar = v
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case "int16":
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var v int16
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err = abi.Unpack(&v, "method", test.marshalledOutput)
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outvar = v
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case "int32":
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var v int32
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err = abi.Unpack(&v, "method", test.marshalledOutput)
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outvar = v
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case "int64":
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var v int64
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err = abi.Unpack(&v, "method", test.marshalledOutput)
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outvar = v
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case "*big.Int":
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var v *big.Int
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err = abi.Unpack(&v, "method", test.marshalledOutput)
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outvar = v
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case "address":
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var v common.Address
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err = abi.Unpack(&v, "method", test.marshalledOutput)
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outvar = v
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case "bytes":
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var v []byte
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err = abi.Unpack(&v, "method", test.marshalledOutput)
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outvar = v
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case "hash":
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var v common.Hash
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err = abi.Unpack(&v, "method", test.marshalledOutput)
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outvar = v
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case "interface":
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err = abi.Unpack(&outvar, "method", test.marshalledOutput)
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default:
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t.Errorf("unsupported type '%v' please add it to the switch statement in this test", test.outVar)
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continue
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}
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if err != nil && len(test.err) == 0 {
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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 && len(test.err) != 0 {
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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 && len(test.err) != 0 && err.Error() != test.err {
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t.Errorf("%d failed. Expected err: '%v' got err: '%v'", i, test.err, err)
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continue
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}
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|
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if err == nil {
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// bit of an ugly hack for hash type but I don't feel like finding a proper solution
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if test.outVar == "hash" {
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tmp := outvar.(common.Hash) // without assignment it's unaddressable
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outvar = tmp[:]
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}
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if !reflect.DeepEqual(test.expectedOut, outvar) {
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t.Errorf("%d failed. Output error: expected %v, got %v", i, test.expectedOut, outvar)
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}
|
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}
|
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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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|
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input interface{}
|
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output []byte
|
||||
}{
|
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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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{"bytes20", [20]byte{1}, pad([]byte{1}, 32, false)},
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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)
|
||||
if err != nil {
|
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t.Fatal("unexpected parse error:", err)
|
||||
}
|
||||
|
||||
output, err := typ.pack(reflect.ValueOf(test.input))
|
||||
if err != nil {
|
||||
t.Fatal("unexpected pack error:", err)
|
||||
}
|
||||
|
||||
if !bytes.Equal(output, test.output) {
|
||||
t.Errorf("%d failed. Expected bytes: '%x' Got: '%x'", i, test.output, output)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func TestMethodPack(t *testing.T) {
|
||||
abi, err := JSON(strings.NewReader(jsondata2))
|
||||
if err != nil {
|
||||
t.Fatal(err)
|
||||
}
|
||||
|
||||
sig := abi.Methods["slice"].Id()
|
||||
sig = append(sig, common.LeftPadBytes([]byte{32}, 32)...)
|
||||
sig = append(sig, common.LeftPadBytes([]byte{2}, 32)...)
|
||||
sig = append(sig, common.LeftPadBytes([]byte{1}, 32)...)
|
||||
sig = append(sig, common.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 = common.Address{1}, common.Address{2}
|
||||
sig = abi.Methods["sliceAddress"].Id()
|
||||
sig = append(sig, common.LeftPadBytes([]byte{32}, 32)...)
|
||||
sig = append(sig, common.LeftPadBytes([]byte{2}, 32)...)
|
||||
sig = append(sig, common.LeftPadBytes(addrA[:], 32)...)
|
||||
sig = append(sig, common.LeftPadBytes(addrB[:], 32)...)
|
||||
|
||||
packed, err = abi.Pack("sliceAddress", []common.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 = common.Address{3}, common.Address{4}
|
||||
sig = abi.Methods["sliceMultiAddress"].Id()
|
||||
sig = append(sig, common.LeftPadBytes([]byte{64}, 32)...)
|
||||
sig = append(sig, common.LeftPadBytes([]byte{160}, 32)...)
|
||||
sig = append(sig, common.LeftPadBytes([]byte{2}, 32)...)
|
||||
sig = append(sig, common.LeftPadBytes(addrA[:], 32)...)
|
||||
sig = append(sig, common.LeftPadBytes(addrB[:], 32)...)
|
||||
sig = append(sig, common.LeftPadBytes([]byte{2}, 32)...)
|
||||
sig = append(sig, common.LeftPadBytes(addrC[:], 32)...)
|
||||
sig = append(sig, common.LeftPadBytes(addrD[:], 32)...)
|
||||
|
||||
packed, err = abi.Pack("sliceMultiAddress", []common.Address{addrA, addrB}, []common.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, common.LeftPadBytes([]byte{32}, 32)...)
|
||||
sig = append(sig, common.LeftPadBytes([]byte{2}, 32)...)
|
||||
sig = append(sig, common.LeftPadBytes([]byte{1}, 32)...)
|
||||
sig = append(sig, common.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)
|
||||
}
|
||||
}
|
||||
|
||||
const jsondata = `
|
||||
[
|
||||
{ "type" : "function", "name" : "balance", "const" : true },
|
||||
{ "type" : "function", "name" : "send", "const" : false, "inputs" : [ { "name" : "amount", "type" : "uint256" } ] }
|
||||
{ "type" : "function", "name" : "balance", "constant" : true },
|
||||
{ "type" : "function", "name" : "send", "constant" : false, "inputs" : [ { "name" : "amount", "type" : "uint256" } ] }
|
||||
]`
|
||||
|
||||
const jsondata2 = `
|
||||
[
|
||||
{ "type" : "function", "name" : "balance", "const" : true },
|
||||
{ "type" : "function", "name" : "send", "const" : false, "inputs" : [ { "name" : "amount", "type" : "uint256" } ] },
|
||||
{ "type" : "function", "name" : "test", "const" : false, "inputs" : [ { "name" : "number", "type" : "uint32" } ] },
|
||||
{ "type" : "function", "name" : "string", "const" : false, "inputs" : [ { "name" : "inputs", "type" : "string" } ] },
|
||||
{ "type" : "function", "name" : "bool", "const" : false, "inputs" : [ { "name" : "inputs", "type" : "bool" } ] },
|
||||
{ "type" : "function", "name" : "address", "const" : false, "inputs" : [ { "name" : "inputs", "type" : "address" } ] },
|
||||
{ "type" : "function", "name" : "string32", "const" : false, "inputs" : [ { "name" : "inputs", "type" : "string32" } ] },
|
||||
{ "type" : "function", "name" : "uint64[2]", "const" : false, "inputs" : [ { "name" : "inputs", "type" : "uint64[2]" } ] },
|
||||
{ "type" : "function", "name" : "uint64[]", "const" : false, "inputs" : [ { "name" : "inputs", "type" : "uint64[]" } ] },
|
||||
{ "type" : "function", "name" : "foo", "const" : false, "inputs" : [ { "name" : "inputs", "type" : "uint32" } ] },
|
||||
{ "type" : "function", "name" : "bar", "const" : false, "inputs" : [ { "name" : "inputs", "type" : "uint32" }, { "name" : "string", "type" : "uint16" } ] },
|
||||
{ "type" : "function", "name" : "slice", "const" : false, "inputs" : [ { "name" : "inputs", "type" : "uint32[2]" } ] },
|
||||
{ "type" : "function", "name" : "slice256", "const" : false, "inputs" : [ { "name" : "inputs", "type" : "uint256[2]" } ] },
|
||||
{ "type" : "function", "name" : "sliceAddress", "const" : false, "inputs" : [ { "name" : "inputs", "type" : "address[]" } ] },
|
||||
{ "type" : "function", "name" : "sliceMultiAddress", "const" : false, "inputs" : [ { "name" : "a", "type" : "address[]" }, { "name" : "b", "type" : "address[]" } ] }
|
||||
{ "type" : "function", "name" : "balance", "constant" : true },
|
||||
{ "type" : "function", "name" : "send", "constant" : false, "inputs" : [ { "name" : "amount", "type" : "uint256" } ] },
|
||||
{ "type" : "function", "name" : "test", "constant" : false, "inputs" : [ { "name" : "number", "type" : "uint32" } ] },
|
||||
{ "type" : "function", "name" : "string", "constant" : false, "inputs" : [ { "name" : "inputs", "type" : "string" } ] },
|
||||
{ "type" : "function", "name" : "bool", "constant" : false, "inputs" : [ { "name" : "inputs", "type" : "bool" } ] },
|
||||
{ "type" : "function", "name" : "address", "constant" : false, "inputs" : [ { "name" : "inputs", "type" : "address" } ] },
|
||||
{ "type" : "function", "name" : "uint64[2]", "constant" : false, "inputs" : [ { "name" : "inputs", "type" : "uint64[2]" } ] },
|
||||
{ "type" : "function", "name" : "uint64[]", "constant" : false, "inputs" : [ { "name" : "inputs", "type" : "uint64[]" } ] },
|
||||
{ "type" : "function", "name" : "foo", "constant" : false, "inputs" : [ { "name" : "inputs", "type" : "uint32" } ] },
|
||||
{ "type" : "function", "name" : "bar", "constant" : false, "inputs" : [ { "name" : "inputs", "type" : "uint32" }, { "name" : "string", "type" : "uint16" } ] },
|
||||
{ "type" : "function", "name" : "slice", "constant" : false, "inputs" : [ { "name" : "inputs", "type" : "uint32[2]" } ] },
|
||||
{ "type" : "function", "name" : "slice256", "constant" : false, "inputs" : [ { "name" : "inputs", "type" : "uint256[2]" } ] },
|
||||
{ "type" : "function", "name" : "sliceAddress", "constant" : false, "inputs" : [ { "name" : "inputs", "type" : "address[]" } ] },
|
||||
{ "type" : "function", "name" : "sliceMultiAddress", "constant" : false, "inputs" : [ { "name" : "a", "type" : "address[]" }, { "name" : "b", "type" : "address[]" } ] }
|
||||
]`
|
||||
|
||||
func TestType(t *testing.T) {
|
||||
typ, err := NewType("uint32")
|
||||
if err != nil {
|
||||
t.Error(err)
|
||||
}
|
||||
if typ.Kind != reflect.Uint {
|
||||
t.Error("expected uint32 to have kind Ptr")
|
||||
}
|
||||
|
||||
typ, err = NewType("uint32[]")
|
||||
if err != nil {
|
||||
t.Error(err)
|
||||
}
|
||||
if !typ.IsSlice {
|
||||
t.Error("expected uint32[] to be slice")
|
||||
}
|
||||
if typ.Type != ubig_t {
|
||||
t.Error("expcted uith32[] to have type uint64")
|
||||
}
|
||||
|
||||
typ, err = NewType("uint32[2]")
|
||||
if err != nil {
|
||||
t.Error(err)
|
||||
}
|
||||
if !typ.IsSlice {
|
||||
t.Error("expected uint32[2] to be slice")
|
||||
}
|
||||
if typ.Type != ubig_t {
|
||||
t.Error("expcted uith32[2] to have type uint64")
|
||||
}
|
||||
if typ.SliceSize != 2 {
|
||||
t.Error("expected uint32[2] to have a size of 2")
|
||||
}
|
||||
}
|
||||
|
||||
func TestReader(t *testing.T) {
|
||||
Uint256, _ := NewType("uint256")
|
||||
exp := ABI{
|
||||
@ -164,21 +489,6 @@ func TestTestString(t *testing.T) {
|
||||
if _, err := abi.Pack("string", "hello world"); err != nil {
|
||||
t.Error(err)
|
||||
}
|
||||
|
||||
str10 := string(make([]byte, 10))
|
||||
if _, err := abi.Pack("string32", str10); err != nil {
|
||||
t.Error(err)
|
||||
}
|
||||
|
||||
str32 := string(make([]byte, 32))
|
||||
if _, err := abi.Pack("string32", str32); err != nil {
|
||||
t.Error(err)
|
||||
}
|
||||
|
||||
str33 := string(make([]byte, 33))
|
||||
if _, err := abi.Pack("string32", str33); err == nil {
|
||||
t.Error("expected str33 to throw out of bound error")
|
||||
}
|
||||
}
|
||||
|
||||
func TestTestBool(t *testing.T) {
|
||||
@ -210,26 +520,10 @@ func TestTestSlice(t *testing.T) {
|
||||
}
|
||||
}
|
||||
|
||||
func TestImplicitTypeCasts(t *testing.T) {
|
||||
abi, err := JSON(strings.NewReader(jsondata2))
|
||||
if err != nil {
|
||||
t.Error(err)
|
||||
t.FailNow()
|
||||
}
|
||||
|
||||
slice := make([]uint8, 2)
|
||||
_, err = abi.Pack("uint64[2]", slice)
|
||||
expStr := "`uint64[2]` abi: cannot use type uint8 as type uint64"
|
||||
if err.Error() != expStr {
|
||||
t.Errorf("expected %v, got %v", expStr, err)
|
||||
}
|
||||
}
|
||||
|
||||
func TestMethodSignature(t *testing.T) {
|
||||
String, _ := NewType("string")
|
||||
String32, _ := NewType("string32")
|
||||
m := Method{"foo", false, []Argument{Argument{"bar", String32, false}, Argument{"baz", String, false}}, nil}
|
||||
exp := "foo(string32,string)"
|
||||
m := Method{"foo", false, []Argument{Argument{"bar", String, false}, Argument{"baz", String, false}}, nil}
|
||||
exp := "foo(string,string)"
|
||||
if m.Sig() != exp {
|
||||
t.Error("signature mismatch", exp, "!=", m.Sig())
|
||||
}
|
||||
@ -247,28 +541,6 @@ func TestMethodSignature(t *testing.T) {
|
||||
}
|
||||
}
|
||||
|
||||
func TestPack(t *testing.T) {
|
||||
abi, err := JSON(strings.NewReader(jsondata2))
|
||||
if err != nil {
|
||||
t.Error(err)
|
||||
t.FailNow()
|
||||
}
|
||||
|
||||
sig := crypto.Keccak256([]byte("foo(uint32)"))[:4]
|
||||
sig = append(sig, make([]byte, 32)...)
|
||||
sig[35] = 10
|
||||
|
||||
packed, err := abi.Pack("foo", uint32(10))
|
||||
if err != nil {
|
||||
t.Error(err)
|
||||
t.FailNow()
|
||||
}
|
||||
|
||||
if !bytes.Equal(packed, sig) {
|
||||
t.Errorf("expected %x got %x", sig, packed)
|
||||
}
|
||||
}
|
||||
|
||||
func TestMultiPack(t *testing.T) {
|
||||
abi, err := JSON(strings.NewReader(jsondata2))
|
||||
if err != nil {
|
||||
@ -292,77 +564,6 @@ func TestMultiPack(t *testing.T) {
|
||||
}
|
||||
}
|
||||
|
||||
func TestPackSlice(t *testing.T) {
|
||||
abi, err := JSON(strings.NewReader(jsondata2))
|
||||
if err != nil {
|
||||
t.Error(err)
|
||||
t.FailNow()
|
||||
}
|
||||
|
||||
sig := crypto.Keccak256([]byte("slice(uint32[2])"))[:4]
|
||||
sig = append(sig, common.LeftPadBytes([]byte{32}, 32)...)
|
||||
sig = append(sig, common.LeftPadBytes([]byte{2}, 32)...)
|
||||
sig = append(sig, common.LeftPadBytes([]byte{1}, 32)...)
|
||||
sig = append(sig, common.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 = common.Address{1}, common.Address{2}
|
||||
sig = abi.Methods["sliceAddress"].Id()
|
||||
sig = append(sig, common.LeftPadBytes([]byte{32}, 32)...)
|
||||
sig = append(sig, common.LeftPadBytes([]byte{2}, 32)...)
|
||||
sig = append(sig, common.LeftPadBytes(addrA[:], 32)...)
|
||||
sig = append(sig, common.LeftPadBytes(addrB[:], 32)...)
|
||||
|
||||
packed, err = abi.Pack("sliceAddress", []common.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 = common.Address{3}, common.Address{4}
|
||||
sig = abi.Methods["sliceMultiAddress"].Id()
|
||||
sig = append(sig, common.LeftPadBytes([]byte{64}, 32)...)
|
||||
sig = append(sig, common.LeftPadBytes([]byte{160}, 32)...)
|
||||
sig = append(sig, common.LeftPadBytes([]byte{2}, 32)...)
|
||||
sig = append(sig, common.LeftPadBytes(addrA[:], 32)...)
|
||||
sig = append(sig, common.LeftPadBytes(addrB[:], 32)...)
|
||||
sig = append(sig, common.LeftPadBytes([]byte{2}, 32)...)
|
||||
sig = append(sig, common.LeftPadBytes(addrC[:], 32)...)
|
||||
sig = append(sig, common.LeftPadBytes(addrD[:], 32)...)
|
||||
|
||||
packed, err = abi.Pack("sliceMultiAddress", []common.Address{addrA, addrB}, []common.Address{addrC, addrD})
|
||||
if err != nil {
|
||||
t.Fatal(err)
|
||||
}
|
||||
if !bytes.Equal(packed, sig) {
|
||||
t.Errorf("expected %x got %x", sig, packed)
|
||||
}
|
||||
|
||||
sig = crypto.Keccak256([]byte("slice256(uint256[2])"))[:4]
|
||||
sig = append(sig, common.LeftPadBytes([]byte{32}, 32)...)
|
||||
sig = append(sig, common.LeftPadBytes([]byte{2}, 32)...)
|
||||
sig = append(sig, common.LeftPadBytes([]byte{1}, 32)...)
|
||||
sig = append(sig, common.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)
|
||||
}
|
||||
}
|
||||
func ExampleJSON() {
|
||||
const definition = `[{"constant":true,"inputs":[{"name":"","type":"address"}],"name":"isBar","outputs":[{"name":"","type":"bool"}],"type":"function"}]`
|
||||
|
||||
@ -382,9 +583,9 @@ func ExampleJSON() {
|
||||
|
||||
func TestInputVariableInputLength(t *testing.T) {
|
||||
const definition = `[
|
||||
{ "type" : "function", "name" : "strOne", "const" : true, "inputs" : [ { "name" : "str", "type" : "string" } ] },
|
||||
{ "type" : "function", "name" : "bytesOne", "const" : true, "inputs" : [ { "name" : "str", "type" : "bytes" } ] },
|
||||
{ "type" : "function", "name" : "strTwo", "const" : true, "inputs" : [ { "name" : "str", "type" : "string" }, { "name" : "str1", "type" : "string" } ] }
|
||||
{ "type" : "function", "name" : "strOne", "constant" : true, "inputs" : [ { "name" : "str", "type" : "string" } ] },
|
||||
{ "type" : "function", "name" : "bytesOne", "constant" : true, "inputs" : [ { "name" : "str", "type" : "bytes" } ] },
|
||||
{ "type" : "function", "name" : "strTwo", "constant" : true, "inputs" : [ { "name" : "str", "type" : "string" }, { "name" : "str1", "type" : "string" } ] }
|
||||
]`
|
||||
|
||||
abi, err := JSON(strings.NewReader(definition))
|
||||
@ -546,7 +747,7 @@ func TestBareEvents(t *testing.T) {
|
||||
|
||||
func TestMultiReturnWithStruct(t *testing.T) {
|
||||
const definition = `[
|
||||
{ "name" : "multi", "const" : false, "outputs": [ { "name": "Int", "type": "uint256" }, { "name": "String", "type": "string" } ] }]`
|
||||
{ "name" : "multi", "constant" : false, "outputs": [ { "name": "Int", "type": "uint256" }, { "name": "String", "type": "string" } ] }]`
|
||||
|
||||
abi, err := JSON(strings.NewReader(definition))
|
||||
if err != nil {
|
||||
@ -599,7 +800,7 @@ func TestMultiReturnWithStruct(t *testing.T) {
|
||||
|
||||
func TestMultiReturnWithSlice(t *testing.T) {
|
||||
const definition = `[
|
||||
{ "name" : "multi", "const" : false, "outputs": [ { "name": "Int", "type": "uint256" }, { "name": "String", "type": "string" } ] }]`
|
||||
{ "name" : "multi", "constant" : false, "outputs": [ { "name": "Int", "type": "uint256" }, { "name": "String", "type": "string" } ] }]`
|
||||
|
||||
abi, err := JSON(strings.NewReader(definition))
|
||||
if err != nil {
|
||||
@ -635,8 +836,8 @@ func TestMultiReturnWithSlice(t *testing.T) {
|
||||
|
||||
func TestMarshalArrays(t *testing.T) {
|
||||
const definition = `[
|
||||
{ "name" : "bytes32", "const" : false, "outputs": [ { "type": "bytes32" } ] },
|
||||
{ "name" : "bytes10", "const" : false, "outputs": [ { "type": "bytes10" } ] }
|
||||
{ "name" : "bytes32", "constant" : false, "outputs": [ { "type": "bytes32" } ] },
|
||||
{ "name" : "bytes10", "constant" : false, "outputs": [ { "type": "bytes10" } ] }
|
||||
]`
|
||||
|
||||
abi, err := JSON(strings.NewReader(definition))
|
||||
@ -694,14 +895,14 @@ func TestMarshalArrays(t *testing.T) {
|
||||
|
||||
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" } ] }]`
|
||||
{ "name" : "int", "constant" : false, "outputs": [ { "type": "uint256" } ] },
|
||||
{ "name" : "bool", "constant" : false, "outputs": [ { "type": "bool" } ] },
|
||||
{ "name" : "bytes", "constant" : false, "outputs": [ { "type": "bytes" } ] },
|
||||
{ "name" : "fixed", "constant" : false, "outputs": [ { "type": "bytes32" } ] },
|
||||
{ "name" : "multi", "constant" : false, "outputs": [ { "type": "bytes" }, { "type": "bytes" } ] },
|
||||
{ "name" : "addressSliceSingle", "constant" : false, "outputs": [ { "type": "address[]" } ] },
|
||||
{ "name" : "addressSliceDouble", "constant" : false, "outputs": [ { "name": "a", "type": "address[]" }, { "name": "b", "type": "address[]" } ] },
|
||||
{ "name" : "mixedBytes", "constant" : true, "outputs": [ { "name": "a", "type": "bytes" }, { "name": "b", "type": "bytes32" } ] }]`
|
||||
|
||||
abi, err := JSON(strings.NewReader(definition))
|
||||
if err != nil {
|
||||
|
79
accounts/abi/error.go
Normal file
79
accounts/abi/error.go
Normal file
@ -0,0 +1,79 @@
|
||||
// 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"
|
||||
"reflect"
|
||||
)
|
||||
|
||||
// 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.Kind, t.SliceSize), val.Type())
|
||||
}
|
||||
if t.IsArray && val.Len() != t.SliceSize {
|
||||
return typeErr(formatSliceString(t.Elem.Kind, t.SliceSize), formatSliceString(val.Type().Elem().Kind(), val.Len()))
|
||||
}
|
||||
|
||||
if t.Elem.IsSlice {
|
||||
if val.Len() > 0 {
|
||||
return sliceTypeCheck(*t.Elem, val.Index(0))
|
||||
}
|
||||
} else if t.Elem.IsArray {
|
||||
return sliceTypeCheck(*t.Elem, val.Index(0))
|
||||
}
|
||||
|
||||
if elemKind := val.Type().Elem().Kind(); elemKind != t.Elem.Kind {
|
||||
return typeErr(formatSliceString(t.Elem.Kind, t.SliceSize), 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.IsSlice || t.IsArray {
|
||||
return sliceTypeCheck(t, value)
|
||||
}
|
||||
|
||||
// Check base type validity. Element types will be checked later on.
|
||||
if t.Kind != value.Kind() {
|
||||
return typeErr(t.Kind, value.Kind())
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
// varErr returns a formatted error.
|
||||
func varErr(expected, got reflect.Kind) error {
|
||||
return typeErr(expected, got)
|
||||
}
|
||||
|
||||
// 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)
|
||||
}
|
@ -18,6 +18,7 @@ package abi
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
"reflect"
|
||||
"strings"
|
||||
|
||||
"github.com/ethereum/go-ethereum/crypto"
|
||||
@ -38,6 +39,44 @@ type Method struct {
|
||||
Outputs []Argument
|
||||
}
|
||||
|
||||
func (m Method) pack(method Method, args ...interface{}) ([]byte, error) {
|
||||
// Make sure arguments match up and pack them
|
||||
if len(args) != len(method.Inputs) {
|
||||
return nil, fmt.Errorf("argument count mismatch: %d for %d", len(args), len(method.Inputs))
|
||||
}
|
||||
// variable input is the output appended at the end of packed
|
||||
// output. This is used for strings and bytes types input.
|
||||
var variableInput []byte
|
||||
|
||||
var ret []byte
|
||||
for i, a := range args {
|
||||
input := method.Inputs[i]
|
||||
// pack the input
|
||||
packed, err := input.Type.pack(reflect.ValueOf(a))
|
||||
if err != nil {
|
||||
return nil, fmt.Errorf("`%s` %v", method.Name, err)
|
||||
}
|
||||
|
||||
// check for a slice type (string, bytes, slice)
|
||||
if input.Type.requiresLengthPrefix() {
|
||||
// calculate the offset
|
||||
offset := len(method.Inputs)*32 + len(variableInput)
|
||||
// set the offset
|
||||
ret = append(ret, packNum(reflect.ValueOf(offset), UintTy)...)
|
||||
// Append the packed output to the variable input. The variable input
|
||||
// will be appended at the end of the 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
|
||||
}
|
||||
|
||||
// Sig returns the methods string signature according to the ABI spec.
|
||||
//
|
||||
// Example
|
||||
|
@ -24,8 +24,8 @@ import (
|
||||
)
|
||||
|
||||
var (
|
||||
big_t = reflect.TypeOf(&big.Int{})
|
||||
ubig_t = reflect.TypeOf(&big.Int{})
|
||||
big_t = reflect.TypeOf(big.Int{})
|
||||
ubig_t = reflect.TypeOf(big.Int{})
|
||||
byte_t = reflect.TypeOf(byte(0))
|
||||
byte_ts = reflect.TypeOf([]byte(nil))
|
||||
uint_t = reflect.TypeOf(uint(0))
|
||||
|
65
accounts/abi/packing.go
Normal file
65
accounts/abi/packing.go
Normal file
@ -0,0 +1,65 @@
|
||||
// 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 (
|
||||
"reflect"
|
||||
|
||||
"github.com/ethereum/go-ethereum/common"
|
||||
)
|
||||
|
||||
// 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), UintTy)
|
||||
return append(len, common.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 {
|
||||
switch t.T {
|
||||
case IntTy, UintTy:
|
||||
return packNum(reflectValue, t.T)
|
||||
case StringTy:
|
||||
return packBytesSlice([]byte(reflectValue.String()), reflectValue.Len())
|
||||
case AddressTy:
|
||||
if reflectValue.Kind() == reflect.Array {
|
||||
reflectValue = mustArrayToByteSlice(reflectValue)
|
||||
}
|
||||
|
||||
return common.LeftPadBytes(reflectValue.Bytes(), 32)
|
||||
case BoolTy:
|
||||
if reflectValue.Bool() {
|
||||
return common.LeftPadBytes(common.Big1.Bytes(), 32)
|
||||
} else {
|
||||
return common.LeftPadBytes(common.Big0.Bytes(), 32)
|
||||
}
|
||||
case BytesTy:
|
||||
if reflectValue.Kind() == reflect.Array {
|
||||
reflectValue = mustArrayToByteSlice(reflectValue)
|
||||
}
|
||||
return packBytesSlice(reflectValue.Bytes(), reflectValue.Len())
|
||||
case FixedBytesTy:
|
||||
if reflectValue.Kind() == reflect.Array {
|
||||
reflectValue = mustArrayToByteSlice(reflectValue)
|
||||
}
|
||||
|
||||
return common.RightPadBytes(reflectValue.Bytes(), 32)
|
||||
}
|
||||
panic("abi: fatal error")
|
||||
}
|
64
accounts/abi/reflect.go
Normal file
64
accounts/abi/reflect.go
Normal file
@ -0,0 +1,64 @@
|
||||
// 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 "reflect"
|
||||
|
||||
// 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() != big_t {
|
||||
return indirect(v.Elem())
|
||||
}
|
||||
return v
|
||||
}
|
||||
|
||||
// reflectIntKind returns the reflect using the given size and
|
||||
// unsignedness.
|
||||
func reflectIntKind(unsigned bool, size int) reflect.Kind {
|
||||
switch size {
|
||||
case 8:
|
||||
if unsigned {
|
||||
return reflect.Uint8
|
||||
}
|
||||
return reflect.Int8
|
||||
case 16:
|
||||
if unsigned {
|
||||
return reflect.Uint16
|
||||
}
|
||||
return reflect.Int16
|
||||
case 32:
|
||||
if unsigned {
|
||||
return reflect.Uint32
|
||||
}
|
||||
return reflect.Int32
|
||||
case 64:
|
||||
if unsigned {
|
||||
return reflect.Uint64
|
||||
}
|
||||
return reflect.Int64
|
||||
}
|
||||
return reflect.Ptr
|
||||
}
|
||||
|
||||
// mustArrayToBytesSlice 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
|
||||
}
|
@ -21,8 +21,6 @@ import (
|
||||
"reflect"
|
||||
"regexp"
|
||||
"strconv"
|
||||
|
||||
"github.com/ethereum/go-ethereum/common"
|
||||
)
|
||||
|
||||
const (
|
||||
@ -40,53 +38,60 @@ const (
|
||||
|
||||
// Type is the reflection of the supported argument type
|
||||
type Type struct {
|
||||
IsSlice bool
|
||||
SliceSize int
|
||||
IsSlice, IsArray bool
|
||||
SliceSize int
|
||||
|
||||
Elem *Type
|
||||
|
||||
Kind reflect.Kind
|
||||
Type reflect.Type
|
||||
Size int
|
||||
T byte // Our own type checking
|
||||
|
||||
Kind reflect.Kind
|
||||
Type reflect.Type
|
||||
Size int
|
||||
T byte // Our own type checking
|
||||
stringKind string // holds the unparsed string for deriving signatures
|
||||
}
|
||||
|
||||
var (
|
||||
// fullTypeRegex parses the abi types
|
||||
//
|
||||
// Types can be in the format of:
|
||||
//
|
||||
// Input = Type [ "[" [ Number ] "]" ] Name .
|
||||
// Type = [ "u" ] "int" [ Number ] .
|
||||
//
|
||||
// Examples:
|
||||
//
|
||||
// string int uint real
|
||||
// string32 int8 uint8 uint[]
|
||||
// address int256 uint256 real[2]
|
||||
fullTypeRegex = regexp.MustCompile("([a-zA-Z0-9]+)(\\[([0-9]*)?\\])?")
|
||||
typeRegex = regexp.MustCompile("([a-zA-Z]+)([0-9]*)?")
|
||||
// typeRegex parses the abi sub types
|
||||
typeRegex = regexp.MustCompile("([a-zA-Z]+)([0-9]*)?")
|
||||
)
|
||||
|
||||
// NewType returns a fully parsed Type given by the input string or an error if it can't be parsed.
|
||||
//
|
||||
// Strings can be in the format of:
|
||||
//
|
||||
// Input = Type [ "[" [ Number ] "]" ] Name .
|
||||
// Type = [ "u" ] "int" [ Number ] .
|
||||
//
|
||||
// Examples:
|
||||
//
|
||||
// string int uint real
|
||||
// string32 int8 uint8 uint[]
|
||||
// address int256 uint256 real[2]
|
||||
// NewType creates a new reflection type of abi type given in t.
|
||||
func NewType(t string) (typ Type, err error) {
|
||||
// 1. full string 2. type 3. (opt.) is slice 4. (opt.) size
|
||||
// parse the full representation of the abi-type definition; including:
|
||||
// * full string
|
||||
// * type
|
||||
// * is slice
|
||||
// * slice size
|
||||
res := fullTypeRegex.FindAllStringSubmatch(t, -1)[0]
|
||||
|
||||
// check if type is slice and parse type.
|
||||
switch {
|
||||
case res[3] != "":
|
||||
// err is ignored. Already checked for number through the regexp
|
||||
typ.SliceSize, _ = strconv.Atoi(res[3])
|
||||
typ.IsSlice = true
|
||||
typ.IsArray = true
|
||||
case res[2] != "":
|
||||
typ.IsSlice, typ.SliceSize = true, -1
|
||||
case res[0] == "":
|
||||
return Type{}, fmt.Errorf("abi: type parse error: %s", t)
|
||||
}
|
||||
if typ.IsArray || typ.IsSlice {
|
||||
sliceType, err := NewType(res[1])
|
||||
if err != nil {
|
||||
return Type{}, err
|
||||
}
|
||||
typ.Elem = &sliceType
|
||||
typ.stringKind = sliceType.stringKind + t[len(res[1]):]
|
||||
return typ, nil
|
||||
}
|
||||
|
||||
// parse the type and size of the abi-type.
|
||||
parsedType := typeRegex.FindAllStringSubmatch(res[1], -1)[0]
|
||||
@ -106,24 +111,24 @@ func NewType(t string) (typ Type, err error) {
|
||||
varSize = 256
|
||||
t += "256"
|
||||
}
|
||||
typ.stringKind = t
|
||||
|
||||
switch varType {
|
||||
case "int":
|
||||
typ.Kind = reflect.Int
|
||||
typ.Kind = reflectIntKind(false, varSize)
|
||||
typ.Type = big_t
|
||||
typ.Size = varSize
|
||||
typ.T = IntTy
|
||||
case "uint":
|
||||
typ.Kind = reflect.Uint
|
||||
typ.Kind = reflectIntKind(true, varSize)
|
||||
typ.Type = ubig_t
|
||||
typ.Size = varSize
|
||||
typ.T = UintTy
|
||||
case "bool":
|
||||
typ.Kind = reflect.Bool
|
||||
typ.T = BoolTy
|
||||
case "real": // TODO
|
||||
typ.Kind = reflect.Invalid
|
||||
case "address":
|
||||
typ.Kind = reflect.Array
|
||||
typ.Type = address_t
|
||||
typ.Size = 20
|
||||
typ.T = AddressTy
|
||||
@ -131,123 +136,55 @@ func NewType(t string) (typ Type, err error) {
|
||||
typ.Kind = reflect.String
|
||||
typ.Size = -1
|
||||
typ.T = StringTy
|
||||
if varSize > 0 {
|
||||
typ.Size = 32
|
||||
}
|
||||
case "hash":
|
||||
typ.Kind = reflect.Array
|
||||
typ.Size = 32
|
||||
typ.Type = hash_t
|
||||
typ.T = HashTy
|
||||
case "bytes":
|
||||
typ.Kind = reflect.Array
|
||||
typ.Type = byte_ts
|
||||
typ.Size = varSize
|
||||
sliceType, _ := NewType("uint8")
|
||||
typ.Elem = &sliceType
|
||||
if varSize == 0 {
|
||||
typ.IsSlice = true
|
||||
typ.T = BytesTy
|
||||
typ.SliceSize = -1
|
||||
} else {
|
||||
typ.IsArray = true
|
||||
typ.T = FixedBytesTy
|
||||
typ.SliceSize = varSize
|
||||
}
|
||||
default:
|
||||
return Type{}, fmt.Errorf("unsupported arg type: %s", t)
|
||||
}
|
||||
typ.stringKind = t
|
||||
|
||||
return
|
||||
}
|
||||
|
||||
// String implements Stringer
|
||||
func (t Type) String() (out string) {
|
||||
return t.stringKind
|
||||
}
|
||||
|
||||
// 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), UintTy)
|
||||
return append(len, common.RightPadBytes(bytes, (l+31)/32*32)...)
|
||||
}
|
||||
func (t Type) pack(v reflect.Value) ([]byte, error) {
|
||||
// dereference pointer first if it's a pointer
|
||||
v = indirect(v)
|
||||
|
||||
// Test the given input parameter `v` and checks if it matches certain
|
||||
// criteria
|
||||
// * Big integers are checks for ptr types and if the given value is
|
||||
// assignable
|
||||
// * Integer are checked for size
|
||||
// * Strings, addresses and bytes are checks for type and size
|
||||
func (t Type) pack(v interface{}) ([]byte, error) {
|
||||
value := reflect.ValueOf(v)
|
||||
switch kind := value.Kind(); kind {
|
||||
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
|
||||
// check input is unsigned
|
||||
if t.Type != ubig_t {
|
||||
return nil, fmt.Errorf("abi: type mismatch: %s for %T", t.Type, v)
|
||||
}
|
||||
|
||||
// no implicit type casting
|
||||
if int(value.Type().Size()*8) != t.Size {
|
||||
return nil, fmt.Errorf("abi: cannot use type %T as type uint%d", v, t.Size)
|
||||
}
|
||||
|
||||
return packNum(value, t.T), nil
|
||||
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
|
||||
if t.Type != ubig_t {
|
||||
return nil, fmt.Errorf("type mismatch: %s for %T", t.Type, v)
|
||||
}
|
||||
|
||||
// no implicit type casting
|
||||
if int(value.Type().Size()*8) != t.Size {
|
||||
return nil, fmt.Errorf("abi: cannot use type %T as type uint%d", v, t.Size)
|
||||
}
|
||||
return packNum(value, t.T), nil
|
||||
case reflect.Ptr:
|
||||
// If the value is a ptr do a assign check (only used by
|
||||
// big.Int for now)
|
||||
if t.Type == ubig_t && value.Type() != ubig_t {
|
||||
return nil, fmt.Errorf("type mismatch: %s for %T", t.Type, v)
|
||||
}
|
||||
return packNum(value, t.T), nil
|
||||
case reflect.String:
|
||||
if t.Size > -1 && value.Len() > t.Size {
|
||||
return nil, fmt.Errorf("%v out of bound. %d for %d", value.Kind(), value.Len(), t.Size)
|
||||
}
|
||||
|
||||
return packBytesSlice([]byte(value.String()), value.Len()), nil
|
||||
case reflect.Slice:
|
||||
// Byte slice is a special case, it gets treated as a single value
|
||||
if t.T == BytesTy {
|
||||
return packBytesSlice(value.Bytes(), value.Len()), nil
|
||||
}
|
||||
|
||||
if t.SliceSize > -1 && value.Len() > t.SliceSize {
|
||||
return nil, fmt.Errorf("%v out of bound. %d for %d", value.Kind(), value.Len(), t.Size)
|
||||
}
|
||||
|
||||
// Signed / Unsigned check
|
||||
if value.Type() == big_t && (t.T != IntTy && isSigned(value)) || (t.T == UintTy && isSigned(value)) {
|
||||
return nil, fmt.Errorf("slice of incompatible types.")
|
||||
}
|
||||
if err := typeCheck(t, v); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
if (t.IsSlice || t.IsArray) && t.T != BytesTy && t.T != FixedBytesTy {
|
||||
var packed []byte
|
||||
for i := 0; i < value.Len(); i++ {
|
||||
val, err := t.pack(value.Index(i).Interface())
|
||||
for i := 0; i < v.Len(); i++ {
|
||||
val, err := t.Elem.pack(v.Index(i))
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
packed = append(packed, val...)
|
||||
}
|
||||
return packBytesSlice(packed, value.Len()), nil
|
||||
case reflect.Bool:
|
||||
if value.Bool() {
|
||||
return common.LeftPadBytes(common.Big1.Bytes(), 32), nil
|
||||
} else {
|
||||
return common.LeftPadBytes(common.Big0.Bytes(), 32), nil
|
||||
}
|
||||
case reflect.Array:
|
||||
if v, ok := value.Interface().(common.Address); ok {
|
||||
return common.LeftPadBytes(v[:], 32), nil
|
||||
} else if v, ok := value.Interface().(common.Hash); ok {
|
||||
return v[:], nil
|
||||
}
|
||||
return packBytesSlice(packed, v.Len()), nil
|
||||
}
|
||||
|
||||
return nil, fmt.Errorf("ABI: bad input given %v", value.Kind())
|
||||
return packElement(t, v), nil
|
||||
}
|
||||
|
||||
// requireLengthPrefix returns whether the type requires any sort of length
|
||||
// prefixing.
|
||||
func (t Type) requiresLengthPrefix() bool {
|
||||
return t.T != FixedBytesTy && (t.T == StringTy || t.T == BytesTy || t.IsSlice || t.IsArray)
|
||||
}
|
||||
|
Loading…
Reference in New Issue
Block a user