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jetton.go
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jetton.go
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package abi
import (
"bytes"
"encoding/hex"
"encoding/json"
"errors"
"fmt"
"reflect"
"github.com/tonkeeper/tongo/boc"
"github.com/tonkeeper/tongo/tlb"
)
type JettonPayload struct {
SumType string
OpCode *uint32
Value any
}
type JettonOpName = string
const (
EmptyJettonOp JettonOpName = ""
UnknownJettonOp JettonOpName = "Cell"
)
// JettonOpCode is the first 4 bytes of a message body identifying an operation to be performed.
type JettonOpCode = uint32
func (j *JettonPayload) UnmarshalJSON(data []byte) error {
var r struct {
SumType string
OpCode *uint32
Value json.RawMessage
}
if err := json.Unmarshal(data, &r); err != nil {
return err
}
j.SumType = r.SumType
j.OpCode = r.OpCode
if j.SumType == EmptyJettonOp {
return nil
}
if j.SumType == UnknownJettonOp {
c := boc.NewCell()
err := json.Unmarshal(r.Value, c)
if err != nil {
return err
}
j.Value = c
return nil
}
t, ok := KnownJettonTypes[j.SumType]
if !ok {
return fmt.Errorf("unknown jetton payload type '%v'", j.SumType)
}
o := reflect.New(reflect.TypeOf(t))
err := json.Unmarshal(r.Value, o.Interface())
if err != nil {
return err
}
j.Value = o.Elem().Interface()
return nil
}
func (j JettonPayload) MarshalJSON() ([]byte, error) {
if j.SumType == EmptyJettonOp {
return []byte("{}"), nil
}
buf := bytes.NewBufferString(`{"SumType": "` + j.SumType + `",`)
if j.OpCode != nil {
fmt.Fprintf(buf, `"OpCode":%v,`, *j.OpCode)
}
buf.WriteString(`"Value":`)
if j.SumType == UnknownJettonOp {
c, ok := j.Value.(*boc.Cell)
if !ok {
return nil, fmt.Errorf("unknown JettonPayload should be Cell")
}
b, err := c.ToBoc()
if err != nil {
return nil, err
}
buf.WriteRune('"')
hex.NewEncoder(buf).Write(b)
buf.WriteString(`"}`)
return buf.Bytes(), nil
}
if KnownJettonTypes[j.SumType] == nil {
return nil, fmt.Errorf("unknown JettonPayload type %v", j.SumType)
}
b, err := json.Marshal(j.Value)
if err != nil {
return nil, err
}
buf.Write(b)
buf.WriteRune('}')
return buf.Bytes(), nil
}
func (j JettonPayload) MarshalTLB(c *boc.Cell, e *tlb.Encoder) error {
if j.SumType == EmptyJettonOp {
return nil
}
if j.OpCode != nil {
err := c.WriteUint(uint64(*j.OpCode), 32)
if err != nil {
return err
}
} else if op, ok := JettonOpCodes[j.SumType]; ok {
err := c.WriteUint(uint64(op), 32)
if err != nil {
return err
}
}
return tlb.Marshal(c, j.Value)
}
func (j *JettonPayload) UnmarshalTLB(cell *boc.Cell, decoder *tlb.Decoder) error {
if completedRead(cell) {
return nil
}
tempCell := cell.CopyRemaining()
op64, err := tempCell.ReadUint(32)
if errors.Is(err, boc.ErrNotEnoughBits) {
j.SumType = UnknownJettonOp
j.Value = cell.CopyRemaining()
return nil
}
op := uint32(op64)
j.OpCode = &op
f, ok := funcJettonDecodersMapping[JettonOpCode(op64)]
if ok && f != nil {
err = f(j, tempCell)
if err == nil {
return nil
}
}
j.SumType = UnknownJettonOp
j.Value = cell.CopyRemaining()
return nil
}