Refactor L1 user deposit processing in x/rollup module

x/rollup/keeper/deposits.go

@@ -70,15 +70,23 @@ func (k *Keeper) processL1UserDepositTxs(ctx sdk.Context, txs [][]byte) (sdk.Eve
 			return nil, types.WrapError(types.ErrInvalidL1Txs, "L1 tx must be a user deposit tx, type %d", tx.Type())
 		}
 		ctx.Logger().Debug("User deposit tx", "index", i, "tx", string(lo.Must(tx.MarshalJSON())))
-		to := tx.To()
 		// if the receipient is nil, it means the tx is creating a contract which we don't support, so return an error.
 		// see https://github.com/ethereum-optimism/op-geth/blob/v1.101301.0-rc.2/core/state_processor.go#L154
-		if to == nil {
+		if tx.To() == nil {
 			ctx.Logger().Error("Contract creation txs are not supported", "index", i)
 			return nil, types.WrapError(types.ErrInvalidL1Txs, "Contract creation txs are not supported, index:%d", i)
 		}
-		cosmAddr := utils.EvmToCosmosAddress(*to)
-		mintAmount := sdkmath.NewIntFromBigInt(tx.Value())
+
+		// Get the sender's address from the transaction
+		// We use NewLondonSigner because deposit transactions follow EIP-2718 and EIP-2930
+		to, err := ethtypes.NewLondonSigner(tx.ChainId()).Sender(&tx)
+		if err != nil {
+			ctx.Logger().Error("Failed to get sender address", "evmAddress", to, "err", err)
+			return nil, types.WrapError(types.ErrInvalidL1Txs, "failed to get sender address: %v", err)
+		}
+		cosmAddr := utils.EvmToCosmosAddress(to)
+		mintAmount := sdkmath.NewIntFromBigInt(tx.Mint())
+
 		mintEvent, err := k.mintETH(ctx, cosmAddr, mintAmount)
 		if err != nil {
 			ctx.Logger().Error("Failed to mint ETH", "evmAddress", to, "cosmosAddress", cosmAddr, "err", err)