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add functionality for unpacking transaction log to event parameters

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This commit is contained in:
Ken Matsushima 2016-06-04 16:15:25 +09:00
parent 828e1e35fd
commit 04bdfa0605
1 changed files with 26 additions and 16 deletions
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42
accounts/abi/abi.go
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@ -232,7 +232,8 @@ var (
// Unpack output in v according to the abi specification
func (abi ABI) Unpack(v interface{}, name string, output []byte) error {
var method = abi.Methods[name]
var method, ok = abi.Methods[name]
var args []Argument
if len(output) == 0 {
return fmt.Errorf("abi: unmarshalling empty output")
@ -244,18 +245,27 @@ func (abi ABI) Unpack(v interface{}, name string, output []byte) error {
return fmt.Errorf("abi: Unpack(non-pointer %T)", v)
}
if ok {
args = method.Outputs
} else {
var event, ok = abi.Events[name]
if ok {
args = event.Inputs
}
}
var (
value = valueOf.Elem()
typ = value.Type()
)
if len(method.Outputs) > 1 {
if len(args) > 1 {
switch value.Kind() {
// struct will match named return values to the struct's field
// names
case reflect.Struct:
for i := 0; i < len(method.Outputs); i++ {
marshalledValue, err := toGoType(i, method.Outputs[i], output)
for i := 0; i < len(args); i++ {
marshalledValue, err := toGoType(i, args[i], output)
if err != nil {
return err
}
@ -264,8 +274,8 @@ func (abi ABI) Unpack(v interface{}, name string, output []byte) error {
for j := 0; j < typ.NumField(); j++ {
field := typ.Field(j)
// TODO read tags: `abi:"fieldName"`
if field.Name == strings.ToUpper(method.Outputs[i].Name[:1])+method.Outputs[i].Name[1:] {
if err := set(value.Field(j), reflectValue, method.Outputs[i]); err != nil {
if field.Name == strings.ToUpper(args[i].Name[:1])+args[i].Name[1:] {
if err := set(value.Field(j), reflectValue, args[i]); err != nil {
return err
}
}
@ -278,17 +288,17 @@ func (abi ABI) Unpack(v interface{}, name string, output []byte) error {
// if the slice already contains values, set those instead of the interface slice itself.
if value.Len() > 0 {
if len(method.Outputs) > value.Len() {
return fmt.Errorf("abi: cannot marshal in to slices of unequal size (require: %v, got: %v)", len(method.Outputs), value.Len())
if len(args) > value.Len() {
return fmt.Errorf("abi: cannot marshal in to slices of unequal size (require: %v, got: %v)", len(args), value.Len())
}
for i := 0; i < len(method.Outputs); i++ {
marshalledValue, err := toGoType(i, method.Outputs[i], output)
for i := 0; i < len(args); i++ {
marshalledValue, err := toGoType(i, args[i], output)
if err != nil {
return err
}
reflectValue := reflect.ValueOf(marshalledValue)
if err := set(value.Index(i).Elem(), reflectValue, method.Outputs[i]); err != nil {
if err := set(value.Index(i).Elem(), reflectValue, args[i]); err != nil {
return err
}
}
@ -297,9 +307,9 @@ func (abi ABI) Unpack(v interface{}, name string, output []byte) error {
// create a new slice and start appending the unmarshalled
// values to the new interface slice.
z := reflect.MakeSlice(typ, 0, len(method.Outputs))
for i := 0; i < len(method.Outputs); i++ {
marshalledValue, err := toGoType(i, method.Outputs[i], output)
z := reflect.MakeSlice(typ, 0, len(args))
for i := 0; i < len(args); i++ {
marshalledValue, err := toGoType(i, args[i], output)
if err != nil {
return err
}
@ -311,11 +321,11 @@ func (abi ABI) Unpack(v interface{}, name string, output []byte) error {
}
} else {
marshalledValue, err := toGoType(0, method.Outputs[0], output)
marshalledValue, err := toGoType(0, args[0], output)
if err != nil {
return err
}
if err := set(value, reflect.ValueOf(marshalledValue), method.Outputs[0]); err != nil {
if err := set(value, reflect.ValueOf(marshalledValue), args[0]); err != nil {
return err
}
}