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sigparser.go
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sigparser.go
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package abi
import (
"fmt"
"github.com/defiweb/go-sigparser"
)
// parseType parses a type signature and returns a Type.
func parseType(abi *ABI, signature string) (Type, error) {
p, err := sigparser.ParseParameter(signature)
if err != nil {
return nil, err
}
return newTypeFromSig(abi, p)
}
// parseStruct parses a structure definition and returns a Type.
func parseStruct(abi *ABI, signature string) (Type, error) {
p, err := sigparser.ParseStruct(signature)
if err != nil {
return nil, err
}
return newTypeFromSig(abi, p)
}
// parseConstructor parses a constructor signature and returns a Constructor.
func parseConstructor(abi *ABI, signature string) (*Constructor, error) {
s, err := sigparser.ParseSignatureAs(sigparser.ConstructorKind, signature)
if err != nil {
return nil, err
}
return newConstructorFromSig(abi, s)
}
// parseError parses an error signature and returns an Error.
func parseError(abi *ABI, signature string) (*Error, error) {
s, err := sigparser.ParseSignatureAs(sigparser.ErrorKind, signature)
if err != nil {
return nil, err
}
return newErrorFromSig(abi, s)
}
// parseEvent parses an event signature and returns an Event.
func parseEvent(abi *ABI, signature string) (*Event, error) {
s, err := sigparser.ParseSignatureAs(sigparser.EventKind, signature)
if err != nil {
return nil, err
}
return newEventFromSig(abi, s)
}
// parseMethod parses a method signature and returns a Method.
func parseMethod(abi *ABI, signature string) (*Method, error) {
s, err := sigparser.ParseSignatureAs(sigparser.FunctionKind, signature)
if err != nil {
return nil, err
}
return newMethodFromSig(abi, s)
}
// newConstructorFromSig creates a new constructor from a sigparser.Signature.
func newConstructorFromSig(abi *ABI, s sigparser.Signature) (*Constructor, error) {
var in []TupleTypeElem
for _, param := range s.Inputs {
typ, err := newTypeFromSig(abi, param)
if err != nil {
return nil, err
}
in = append(in, TupleTypeElem{
Name: param.Name,
Type: typ,
})
}
return abi.NewConstructor(NewTupleType(in...)), nil
}
// newErrorFromSig creates a new error from a sigparser.Signature.
func newErrorFromSig(abi *ABI, s sigparser.Signature) (*Error, error) {
var in []TupleTypeElem
if len(s.Inputs) == 0 {
return nil, fmt.Errorf("abi: event %q has no inputs", s.Name)
}
for _, param := range s.Inputs {
typ, err := newTypeFromSig(abi, param)
if err != nil {
return nil, err
}
in = append(in, TupleTypeElem{
Name: param.Name,
Type: typ,
})
}
return abi.NewError(s.Name, NewTupleType(in...)), nil
}
// newEventFromSig creates a new event from a sigparser.Signature.
func newEventFromSig(abi *ABI, s sigparser.Signature) (*Event, error) {
var in []EventTupleElem
if len(s.Inputs) == 0 {
return nil, fmt.Errorf("abi: event %q has no inputs", s.Name)
}
for _, param := range s.Inputs {
typ, err := newTypeFromSig(abi, param)
if err != nil {
return nil, err
}
in = append(in, EventTupleElem{
Name: param.Name,
Indexed: param.Indexed,
Type: typ,
})
}
anonymous := false
for _, param := range s.Modifiers {
if param == "anonymous" {
anonymous = true
break
}
}
return abi.NewEvent(s.Name, NewEventTupleType(in...), anonymous), nil
}
// newMethodFromSig creates a new method from a sigparser.Signature.
func newMethodFromSig(abi *ABI, s sigparser.Signature) (*Method, error) {
var (
in []TupleTypeElem
out []TupleTypeElem
)
for _, param := range s.Inputs {
typ, err := newTypeFromSig(abi, param)
if err != nil {
return nil, err
}
in = append(in, TupleTypeElem{
Name: param.Name,
Type: typ,
})
}
for _, param := range s.Outputs {
typ, err := newTypeFromSig(abi, param)
if err != nil {
return nil, err
}
out = append(out, TupleTypeElem{
Name: param.Name,
Type: typ,
})
}
return abi.NewMethod(s.Name, NewTupleType(in...), NewTupleType(out...)), nil
}
// newTypeFromSig creates a new type from a sigparser.Parameter.
func newTypeFromSig(abi *ABI, s sigparser.Parameter) (typ Type, err error) {
switch {
case len(s.Arrays) > 0:
arrays := s.Arrays
s.Arrays = nil
if typ, err = newTypeFromSig(abi, s); err != nil {
return nil, err
}
for i := len(arrays) - 1; i >= 0; i-- {
if arrays[i] == -1 {
typ = NewArrayType(typ)
} else {
typ = NewFixedArrayType(typ, arrays[i])
}
}
return typ, nil
case len(s.Tuple) > 0:
tuple := make([]TupleTypeElem, len(s.Tuple))
for i, param := range s.Tuple {
tuple[i].Name = param.Name
tuple[i].Type, err = newTypeFromSig(abi, param)
if err != nil {
return nil, err
}
}
return NewTupleType(tuple...), nil
default:
if typ = abi.Types[s.Type]; typ != nil {
return typ, nil
}
return nil, fmt.Errorf("abi: unknown type %q", s.Type)
}
}