From cef744a70eb6e0d43d918727e5680bf6f36fe72a Mon Sep 17 00:00:00 2001
From: Shubham Damkondwar <shubhamdamkondwar036@bitgo.com>
Date: Fri, 13 Mar 2026 23:58:50 +0530
Subject: [PATCH] feat: add support for L1 fee buffers in gas calculations for
 multiple coin families

CECHO-354

TICKET: CECHO-354
---
 .gitignore                                     |  1 +
 .../src/abstractEthLikeNewCoins.ts             | 18 +++++++++++++-----
 modules/abstract-eth/src/ethLikeToken.ts       |  7 +++----
 modules/statics/src/tokenConfig.ts             |  2 +-
 4 files changed, 18 insertions(+), 10 deletions(-)

diff --git a/.gitignore b/.gitignore
index 028dd2ee8e..0ca92b500e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,5 @@
 node_modules/
+.worktrees/
 .idea/
 *.iml
 lerna-debug.log
diff --git a/modules/abstract-eth/src/abstractEthLikeNewCoins.ts b/modules/abstract-eth/src/abstractEthLikeNewCoins.ts
index a29761ffde..09df1c0a99 100644
--- a/modules/abstract-eth/src/abstractEthLikeNewCoins.ts
+++ b/modules/abstract-eth/src/abstractEthLikeNewCoins.ts
@@ -492,6 +492,11 @@ export const optionalDeps = {
 export abstract class AbstractEthLikeNewCoins extends AbstractEthLikeCoin {
   static hopTransactionSalt = 'bitgoHopAddressRequestSalt';
   protected readonly sendMethodName: 'sendMultiSig' | 'sendMultiSigToken';
+  protected readonly coinFamiliesWithL1Fees: ReadonlyArray<'opeth' | 'dogeos' | 'morpheth'> = [
+    'opeth',
+    'dogeos',
+    'morpheth',
+  ];
 
   readonly staticsCoin?: Readonly<StaticsBaseCoin>;
 
@@ -1516,10 +1521,9 @@ export abstract class AbstractEthLikeNewCoins extends AbstractEthLikeCoin {
     const backupKeyBalance = await this.queryAddressBalance(backupKeyAddress, params.apiKey);
     let totalGasNeeded = gasPrice.mul(gasLimit);
 
-    // On optimism chain, L1 fees is to be paid as well apart from L2 fees
-    // So we are adding the amount that can be used up as l1 fees
-    if (this.staticsCoin?.family === 'opeth') {
-      totalGasNeeded = totalGasNeeded.add(new optionalDeps.ethUtil.BN(ethGasConfigs.opethGasL1Fees));
+    // On L2 chains with L1 data fees, add buffer for L1 fees
+    if (this.staticsCoin?.family !== undefined && this.coinFamiliesWithL1Fees.includes(this.staticsCoin.family)) {
+      totalGasNeeded = totalGasNeeded.add(new optionalDeps.ethUtil.BN(ethGasConfigs.l1GasFeeBuffer));
     }
 
     const weiToGwei = 10 ** 9;
@@ -2515,7 +2519,11 @@ export abstract class AbstractEthLikeNewCoins extends AbstractEthLikeCoin {
 
   async validateBalanceAndGetTxAmount(baseAddress: string, gasPrice: BN, gasLimit: BN, apiKey?: string) {
     const baseAddressBalance = await this.queryAddressBalance(baseAddress, apiKey);
-    const totalGasNeeded = gasPrice.mul(gasLimit);
+    let totalGasNeeded = gasPrice.mul(gasLimit);
+    // On L2 chains with L1 data fees, add buffer for L1 fees
+    if (this.staticsCoin?.family !== undefined && this.coinFamiliesWithL1Fees.includes(this.staticsCoin.family)) {
+      totalGasNeeded = totalGasNeeded.add(new optionalDeps.ethUtil.BN(ethGasConfigs.l1GasFeeBuffer));
+    }
     const weiToGwei = new BN(10 ** 9);
     if (baseAddressBalance.lt(totalGasNeeded)) {
       throw new Error(
diff --git a/modules/abstract-eth/src/ethLikeToken.ts b/modules/abstract-eth/src/ethLikeToken.ts
index 830006e1e4..9a4fc7a66c 100644
--- a/modules/abstract-eth/src/ethLikeToken.ts
+++ b/modules/abstract-eth/src/ethLikeToken.ts
@@ -276,10 +276,9 @@ export class EthLikeToken extends AbstractEthLikeNewCoins {
 
     let totalGasNeeded = gasPrice.mul(gasLimit);
 
-    // On optimism chain, L1 fees is to be paid as well apart from L2 fees
-    // So we are adding the amount that can be used up as l1 fees
-    if (this.staticsCoin?.family === 'opeth') {
-      totalGasNeeded = totalGasNeeded.add(new optionalDeps.ethUtil.BN(ethGasConfigs.opethGasL1Fees));
+    // On L2 chains with L1 data fees (opeth, morpheth, dogeos), add buffer for L1 fees
+    if (['opeth', 'morpheth', 'dogeos'].includes(this.staticsCoin?.family ?? '')) {
+      totalGasNeeded = totalGasNeeded.add(new optionalDeps.ethUtil.BN(ethGasConfigs.l1GasFeeBuffer));
     }
 
     const weiToGwei = 10 ** 9;
diff --git a/modules/statics/src/tokenConfig.ts b/modules/statics/src/tokenConfig.ts
index dc678d06bc..21d8755c31 100644
--- a/modules/statics/src/tokenConfig.ts
+++ b/modules/statics/src/tokenConfig.ts
@@ -344,7 +344,7 @@ export const ethGasConfigs = {
   minimumGasLimit: 30000, // minimum gas limit a user can set for a send
   maximumGasLimit: 20000000, // Customers cannot set gas limits beyond this amount
   newEthLikeCoinsMinGasLimit: 400000, // minimum gas limit a user can set for a send for eth like coins like arbitrum, optimism, etc
-  opethGasL1Fees: 1000000000000000, // Buffer for opeth L1 gas fees
+  l1GasFeeBuffer: 1000000000000000, // Buffer for L1 data fees
 };
 
 function getStellarTokenConfig(coin: StellarCoin): StellarTokenConfig {