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rlp_unmarshal.go
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rlp_unmarshal.go
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package types
import (
"fmt"
"math/big"
"github.com/umbracle/fastrlp"
)
type RLPUnmarshaler interface {
UnmarshalRLP(input []byte) error
}
type unmarshalRLPFunc func(p *fastrlp.Parser, v *fastrlp.Value) error
func UnmarshalRlp(obj unmarshalRLPFunc, input []byte) error {
pr := fastrlp.DefaultParserPool.Get()
v, err := pr.Parse(input)
if err != nil {
fastrlp.DefaultParserPool.Put(pr)
return err
}
if err := obj(pr, v); err != nil {
fastrlp.DefaultParserPool.Put(pr)
return err
}
fastrlp.DefaultParserPool.Put(pr)
return nil
}
func (b *Block) UnmarshalRLP(input []byte) error {
return UnmarshalRlp(b.UnmarshalRLPFrom, input)
}
func (b *Block) UnmarshalRLPFrom(p *fastrlp.Parser, v *fastrlp.Value) error {
elems, err := v.GetElems()
if err != nil {
return err
}
if len(elems) < 3 {
return fmt.Errorf("incorrect number of elements to decode block, expected 3 but found %d", len(elems))
}
// header
b.Header = &Header{}
if err := b.Header.UnmarshalRLPFrom(p, elems[0]); err != nil {
return err
}
// transactions
txns, err := elems[1].GetElems()
if err != nil {
return err
}
for _, txn := range txns {
bTxn := &Transaction{}
if err := bTxn.UnmarshalRLPFrom(p, txn); err != nil {
return err
}
b.Transactions = append(b.Transactions, bTxn)
}
// uncles
uncles, err := elems[2].GetElems()
if err != nil {
return err
}
for _, uncle := range uncles {
bUncle := &Header{}
if err := bUncle.UnmarshalRLPFrom(p, uncle); err != nil {
return err
}
b.Uncles = append(b.Uncles, bUncle)
}
return nil
}
func (h *Header) UnmarshalRLP(input []byte) error {
return UnmarshalRlp(h.UnmarshalRLPFrom, input)
}
func (h *Header) UnmarshalRLPFrom(p *fastrlp.Parser, v *fastrlp.Value) error {
elems, err := v.GetElems()
if err != nil {
return err
}
if len(elems) < 15 {
return fmt.Errorf("incorrect number of elements to decode header, expected 15 but found %d", len(elems))
}
// parentHash
if err = elems[0].GetHash(h.ParentHash[:]); err != nil {
return err
}
// sha3uncles
if err = elems[1].GetHash(h.Sha3Uncles[:]); err != nil {
return err
}
// miner
if h.Miner, err = elems[2].GetBytes(h.Miner[:]); err != nil {
return err
}
// stateroot
if err = elems[3].GetHash(h.StateRoot[:]); err != nil {
return err
}
// txroot
if err = elems[4].GetHash(h.TxRoot[:]); err != nil {
return err
}
// receiptroot
if err = elems[5].GetHash(h.ReceiptsRoot[:]); err != nil {
return err
}
// logsBloom
if _, err = elems[6].GetBytes(h.LogsBloom[:0], 256); err != nil {
return err
}
// difficulty
if h.Difficulty, err = elems[7].GetUint64(); err != nil {
return err
}
// number
if h.Number, err = elems[8].GetUint64(); err != nil {
return err
}
// gasLimit
if h.GasLimit, err = elems[9].GetUint64(); err != nil {
return err
}
// gasused
if h.GasUsed, err = elems[10].GetUint64(); err != nil {
return err
}
// timestamp
if h.Timestamp, err = elems[11].GetUint64(); err != nil {
return err
}
// extraData
if h.ExtraData, err = elems[12].GetBytes(h.ExtraData[:0]); err != nil {
return err
}
// mixHash
if err = elems[13].GetHash(h.MixHash[:0]); err != nil {
return err
}
// nonce
nonce, err := elems[14].GetUint64()
if err != nil {
return err
}
h.SetNonce(nonce)
// compute the hash after the decoding
h.ComputeHash()
return err
}
func (r *Receipts) UnmarshalRLP(input []byte) error {
return UnmarshalRlp(r.UnmarshalRLPFrom, input)
}
func (r *Receipts) UnmarshalRLPFrom(p *fastrlp.Parser, v *fastrlp.Value) error {
elems, err := v.GetElems()
if err != nil {
return err
}
for _, elem := range elems {
rr := &Receipt{}
if err := rr.UnmarshalRLPFrom(p, elem); err != nil {
return err
}
(*r) = append(*r, rr)
}
return nil
}
func (r *Receipt) UnmarshalRLP(input []byte) error {
return UnmarshalRlp(r.UnmarshalRLPFrom, input)
}
// UnmarshalRLP unmarshals a Receipt in RLP format
func (r *Receipt) UnmarshalRLPFrom(p *fastrlp.Parser, v *fastrlp.Value) error {
elems, err := v.GetElems()
if err != nil {
return err
}
if len(elems) < 4 {
return fmt.Errorf("incorrect number of elements to decode receipt, expected 4 but found %d", len(elems))
}
// root or status
buf, err := elems[0].Bytes()
if err != nil {
return err
}
switch size := len(buf); size {
case 32:
// root
copy(r.Root[:], buf[:])
case 1:
// status
r.SetStatus(ReceiptStatus(buf[0]))
default:
r.SetStatus(0)
}
// cumulativeGasUsed
if r.CumulativeGasUsed, err = elems[1].GetUint64(); err != nil {
return err
}
// logsBloom
if _, err = elems[2].GetBytes(r.LogsBloom[:0], 256); err != nil {
return err
}
// logs
logsElems, err := v.Get(3).GetElems()
if err != nil {
return err
}
for _, elem := range logsElems {
log := &Log{}
if err := log.UnmarshalRLPFrom(p, elem); err != nil {
return err
}
r.Logs = append(r.Logs, log)
}
return nil
}
func (l *Log) UnmarshalRLPFrom(p *fastrlp.Parser, v *fastrlp.Value) error {
elems, err := v.GetElems()
if err != nil {
return err
}
if len(elems) < 3 {
return fmt.Errorf("incorrect number of elements to decode log, expected 3 but found %d", len(elems))
}
// address
if err := elems[0].GetAddr(l.Address[:]); err != nil {
return err
}
// topics
topicElems, err := elems[1].GetElems()
if err != nil {
return err
}
l.Topics = make([]Hash, len(topicElems))
for indx, topic := range topicElems {
if err := topic.GetHash(l.Topics[indx][:]); err != nil {
return err
}
}
// data
if l.Data, err = elems[2].GetBytes(l.Data[:0]); err != nil {
return err
}
return nil
}
func (t *Transaction) UnmarshalRLP(input []byte) error {
return UnmarshalRlp(t.UnmarshalRLPFrom, input)
}
// UnmarshalRLPFrom unmarshals a Transaction in RLP format
func (t *Transaction) UnmarshalRLPFrom(p *fastrlp.Parser, v *fastrlp.Value) error {
elems, err := v.GetElems()
if err != nil {
return err
}
if len(elems) < 9 {
return fmt.Errorf("incorrect number of elements to decode transaction, expected 9 but found %d", len(elems))
}
p.Hash(t.Hash[:0], v)
// nonce
if t.Nonce, err = elems[0].GetUint64(); err != nil {
return err
}
// gasPrice
t.GasPrice = new(big.Int)
if err := elems[1].GetBigInt(t.GasPrice); err != nil {
return err
}
// gas
if t.Gas, err = elems[2].GetUint64(); err != nil {
return err
}
// to
if vv, _ := v.Get(3).Bytes(); len(vv) == 20 {
// address
addr := BytesToAddress(vv)
t.To = &addr
} else {
// reset To
t.To = nil
}
// value
t.Value = new(big.Int)
if err := elems[4].GetBigInt(t.Value); err != nil {
return err
}
// input
if t.Input, err = elems[5].GetBytes(t.Input[:0]); err != nil {
return err
}
// V
t.V = new(big.Int)
if err = elems[6].GetBigInt(t.V); err != nil {
return err
}
// R
t.R = new(big.Int)
if err = elems[7].GetBigInt(t.R); err != nil {
return err
}
// S
t.S = new(big.Int)
if err = elems[8].GetBigInt(t.S); err != nil {
return err
}
return nil
}