feat: add support for gasPrice in transaction overrides and schemas

Author: d4mr

src/server/schemas/transaction/index.ts

@@ -266,7 +266,7 @@ export const toTransactionSchema = (
     if (transaction.status === "sent") {
       return transaction.gasPrice?.toString() ?? null;
     }
-    return null;
+    return transaction.overrides?.gasPrice?.toString() ?? null;
   };
 
   const resolveMaxFeePerGas = (): string | null => {

src/server/schemas/txOverrides.ts

@@ -10,8 +10,11 @@ export const txOverridesSchema = Type.Object({
         description: "Gas limit for the transaction",
       }),
 
-      // Overriding `gasPrice` is currently not supported.
-
+      gasPrice: Type.Optional({
+        ...WeiAmountStringSchema,
+        description:
+          "Gas price for the transaction. Do not use this if maxFeePerGas is set or if you want to use EIP-1559 type transactions. Only use this if you want to use legacy transactions.",
+      }),
       maxFeePerGas: Type.Optional({
         ...WeiAmountStringSchema,
         description: "Maximum fee per gas",

src/server/utils/transactionOverrides.ts

@@ -18,6 +18,7 @@ export const parseTransactionOverrides = (
   return {
     overrides: {
       gas: maybeBigInt(overrides.gas),
+      gasPrice: maybeBigInt(overrides.gasPrice),
       maxFeePerGas: maybeBigInt(overrides.maxFeePerGas),
       maxPriorityFeePerGas: maybeBigInt(overrides.maxPriorityFeePerGas),
     },

src/utils/transaction/types.ts

@@ -28,6 +28,7 @@ export type InsertedTransaction = {
   // User-provided overrides.
   overrides?: {
     gas?: bigint;
+    gasPrice?: bigint;
     maxFeePerGas?: bigint;
     maxPriorityFeePerGas?: bigint;
   };

src/worker/tasks/sendTransactionWorker.ts

@@ -305,6 +305,8 @@ const _sendTransaction = async (
   // This call throws if the execution would be reverted.
   // The nonce is _not_ set yet.
 
+  console.log("override gas price", overrides?.gasPrice);
+
   let populatedTransaction: PopulatedTransaction;
   try {
     populatedTransaction = await toSerializableTransaction({
@@ -320,6 +322,7 @@ const _sendTransaction = async (
         // Apply gas setting overrides.
         // Do not set `maxFeePerGas` to estimate the onchain value.
         gas: overrides?.gas,
+        gasPrice: overrides?.gasPrice,
         maxPriorityFeePerGas: overrides?.maxPriorityFeePerGas,
       },
     });
@@ -403,6 +406,8 @@ const _sendTransaction = async (
   }
 
   await addSentNonce(chainId, from, nonce);
+  console.log("populated transaction gas price", populatedTransaction.gasPrice);
+
   return {
     ...queuedTransaction,
     status: "sent",