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transaction.go
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transaction.go
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package forge
import (
"bytes"
"encoding/binary"
"github.com/dipdup-net/go-lib/node"
"github.com/dipdup-net/go-lib/tools/base"
"github.com/dipdup-net/go-lib/tools/types"
"github.com/pkg/errors"
)
// Transaction -
func Transaction(transaction node.Transaction) ([]byte, error) {
buf := new(bytes.Buffer)
tag, ok := operationTags[node.KindTransaction]
if !ok {
return nil, errors.Errorf("unknown operation tag: %s", node.KindTransaction)
}
kind, err := ForgeNat(types.NewBigIntFromString(tag))
if err != nil {
return nil, errors.Wrap(err, "kind forging")
}
buf.Write(kind)
source, err := Address(transaction.Source, true)
if err != nil {
return nil, errors.Wrap(err, "source forging")
}
buf.Write(source)
fee, err := ForgeNat(types.NewBigIntFromString(transaction.Fee))
if err != nil {
return nil, errors.Wrap(err, "fee forging")
}
buf.Write(fee)
counter, err := ForgeNat(types.NewBigIntFromString(transaction.Counter))
if err != nil {
return nil, errors.Wrap(err, "counter forging")
}
buf.Write(counter)
gasLimit, err := ForgeNat(types.NewBigIntFromString(transaction.GasLimit))
if err != nil {
return nil, errors.Wrap(err, "gas limit forging")
}
buf.Write(gasLimit)
storageLimit, err := ForgeNat(types.NewBigIntFromString(transaction.StorageLimit))
if err != nil {
return nil, errors.Wrap(err, "storage limit forging")
}
buf.Write(storageLimit)
amount, err := ForgeNat(types.NewBigIntFromString(transaction.Amount))
if err != nil {
return nil, errors.Wrap(err, "amount forging")
}
buf.Write(amount)
destination, err := Address(transaction.Destination, false)
if err != nil {
return nil, errors.Wrap(err, "destination forging")
}
buf.Write(destination)
hasParams := transaction.Parameters != nil
buf.Write(ForgeBool(hasParams))
if hasParams {
buf.Write(forgeEntrypoint(transaction.Parameters.Entrypoint))
var node base.Node
if err := json.Unmarshal(*transaction.Parameters.Value, &node); err != nil {
return nil, errors.Wrap(err, "parameter's value unmarshaling")
}
forger := NewMichelson()
forger.Nodes = []*base.Node{&node}
value, err := forger.Forge()
if err != nil {
return nil, errors.Wrap(err, "parameter's value forging")
}
buf.Write(ForgeArray(value, 4))
}
return buf.Bytes(), nil
}
// ForgeArray -
func ForgeArray(value []byte, l uint64) []byte {
buf := new(bytes.Buffer)
_ = binary.Write(buf, binary.LittleEndian, uint64(len(value)))
bytes := reverseBytes(buf.Bytes()[0:l])
return append(bytes, value...)
}
func forgeEntrypoint(value string) []byte {
buf := new(bytes.Buffer)
if val, ok := entrypointTags[value]; ok {
buf.WriteByte(val)
} else {
buf.WriteByte(byte(255))
buf.Write(ForgeArray(bytes.NewBufferString(value).Bytes(), 1))
}
return buf.Bytes()
}