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@ -1,6 +1,7 @@ |
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package common |
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import ( |
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"crypto/sha256" |
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"fmt" |
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"math/big" |
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@ -10,16 +11,19 @@ import ( |
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// L2Tx is a struct that represents an already forged L2 tx
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type L2Tx struct { |
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// Stored in DB: mandatory fileds
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TxID TxID `meddler:"id"` |
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BatchNum BatchNum `meddler:"batch_num"` // batchNum in which this tx was forged.
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Position int `meddler:"position"` |
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FromIdx Idx `meddler:"from_idx"` |
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ToIdx Idx `meddler:"to_idx"` |
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Amount *big.Int `meddler:"amount,bigint"` |
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Fee FeeSelector `meddler:"fee"` |
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Nonce Nonce `meddler:"nonce"` |
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Type TxType `meddler:"type"` |
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EthBlockNum int64 `meddler:"eth_block_num"` // Ethereum Block Number in which this L2Tx was added to the queue
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TxID TxID `meddler:"id"` |
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BatchNum BatchNum `meddler:"batch_num"` // batchNum in which this tx was forged.
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Position int `meddler:"position"` |
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FromIdx Idx `meddler:"from_idx"` |
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ToIdx Idx `meddler:"to_idx"` |
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// TokenID is filled by the TxProcessor
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TokenID TokenID `meddler:"token_id"` |
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Amount *big.Int `meddler:"amount,bigint"` |
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Fee FeeSelector `meddler:"fee"` |
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// Nonce is filled by the TxProcessor
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Nonce Nonce `meddler:"nonce"` |
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Type TxType `meddler:"type"` |
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EthBlockNum int64 `meddler:"eth_block_num"` // Ethereum Block Number in which this L2Tx was added to the queue
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} |
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// NewL2Tx returns the given L2Tx with the TxId & Type parameters calculated
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@ -63,18 +67,53 @@ func (tx *L2Tx) SetType() error { |
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// SetID sets the ID of the transaction
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func (tx *L2Tx) SetID() error { |
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tx.TxID[0] = TxIDPrefixL2Tx |
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txID, err := tx.CalculateTxID() |
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if err != nil { |
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return err |
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} |
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tx.TxID = txID |
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return nil |
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} |
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// CalculateTxID returns the TxID of the transaction. This method is used to
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// set the TxID for L2Tx and for PoolL2Tx.
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func (tx L2Tx) CalculateTxID() ([TxIDLen]byte, error) { |
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var txID TxID |
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var b []byte |
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// FromIdx
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fromIdxBytes, err := tx.FromIdx.Bytes() |
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if err != nil { |
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return tracerr.Wrap(err) |
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return txID, tracerr.Wrap(err) |
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} |
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copy(tx.TxID[1:7], fromIdxBytes[:]) |
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b = append(b, fromIdxBytes[:]...) |
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// TokenID
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b = append(b, tx.TokenID.Bytes()[:]...) |
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// Amount
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amountFloat16, err := NewFloat16(tx.Amount) |
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if err != nil { |
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return txID, tracerr.Wrap(fmt.Errorf("%s: %d", err, tx.Amount)) |
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} |
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b = append(b, amountFloat16.Bytes()...) |
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// Nonce
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nonceBytes, err := tx.Nonce.Bytes() |
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if err != nil { |
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return tracerr.Wrap(err) |
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return txID, tracerr.Wrap(err) |
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} |
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copy(tx.TxID[7:12], nonceBytes[:]) |
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return nil |
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b = append(b, nonceBytes[:]...) |
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// Fee
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b = append(b, byte(tx.Fee)) |
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// calculate hash
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h := sha256.New() |
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_, err = h.Write(b) |
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if err != nil { |
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return txID, tracerr.Wrap(err) |
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} |
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r := h.Sum(nil) |
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txID[0] = TxIDPrefixL2Tx |
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copy(txID[1:], r) |
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return txID, nil |
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} |
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// Tx returns a *Tx from the L2Tx
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@ -92,6 +131,7 @@ func (tx *L2Tx) Tx() *Tx { |
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Position: tx.Position, |
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FromIdx: tx.FromIdx, |
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ToIdx: tx.ToIdx, |
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TokenID: tx.TokenID, |
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Amount: tx.Amount, |
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BatchNum: batchNum, |
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EthBlockNum: tx.EthBlockNum, |
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@ -107,6 +147,7 @@ func (tx L2Tx) PoolL2Tx() *PoolL2Tx { |
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TxID: tx.TxID, |
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FromIdx: tx.FromIdx, |
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ToIdx: tx.ToIdx, |
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TokenID: tx.TokenID, |
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Amount: tx.Amount, |
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Fee: tx.Fee, |
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Nonce: tx.Nonce, |
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@ -134,6 +175,7 @@ func TxIDsFromL2Txs(txs []L2Tx) []TxID { |
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} |
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// BytesDataAvailability encodes a L2Tx into []byte for the Data Availability
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// [ fromIdx | toIdx | amountFloat16 | Fee ]
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func (tx L2Tx) BytesDataAvailability(nLevels uint32) ([]byte, error) { |
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idxLen := nLevels / 8 //nolint:gomnd
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