Update SQL schemas

common/l2tx.go

@@ -1,7 +1,20 @@
 package common
 
+import (
+	"math/big"
+)
+
 // L2Tx is a struct that represents an already forged L2 tx
 type L2Tx struct {
-	Tx
-	Position int // Position among all the L1Txs in that batch
+	// Stored in DB: mandatory fileds
+	TxID     TxID        `meddler:"tx_id"`
+	BatchNum BatchNum    `meddler:"batch_num"` // batchNum in which this tx was forged.
+	Position int         `meddler:"position"`
+	FromIdx  Idx         `meddler:"from_idx"`
+	ToIdx    Idx         `meddler:"to_idx"`
+	Amount   *big.Int    `meddler:"amount,bigint"`
+	Fee      FeeSelector `meddler:"fee"`
+	Nonce    uint64      `meddler:"nonce"`
+	// Extra metadata, may be uninitialized
+	Type TxType `meddler:"-"` // optional, descrives which kind of tx it's
 }