diff --git a/src/providers/evm/privyAlchemyEvmProviderAdapter.ts b/src/providers/evm/privyAlchemyEvmProviderAdapter.ts
index 440b780..d494c5d 100644
--- a/src/providers/evm/privyAlchemyEvmProviderAdapter.ts
+++ b/src/providers/evm/privyAlchemyEvmProviderAdapter.ts
@@ -7,7 +7,6 @@ import {
   toHex,
   TypedDataDefinition,
   type Address,
-  type Call,
   type Chain,
   type Hex,
   type Log,
@@ -24,6 +23,7 @@ import {
 } from "viem/actions";
 import { createEvmNetworkContext, EVM_MAINNET_CHAINS } from "../../core/chains.js";
 import type {
+  EvmCall,
   GetLogsParams,
   IEvmProviderAdapter,
   ReadContractParams,
@@ -451,7 +451,7 @@ export class PrivyAlchemyEvmProviderAdapter implements IEvmProviderAdapter {
     return `0x${hex}`;
   }
 
-  async sendTransaction(chainId: number, call: Call): Promise<Address> {
+  async sendTransaction(chainId: number, call: EvmCall): Promise<Address> {
     const { walletClient } = this.getClients(chainId);
     return walletClient.sendTransaction({
       account: walletClient.account!,
@@ -459,12 +459,17 @@ export class PrivyAlchemyEvmProviderAdapter implements IEvmProviderAdapter {
       to: call.to,
       data: call.data,
       value: call.value,
+      // Forward an explicit gas limit when the caller supplies one.
+      // Avoids the bundler's default estimate running too tight on
+      // complex routes (e.g. LiFi multi-hop with FeeCollector +
+      // DEX legs), which we've seen revert at ~95% gas utilization.
+      ...(call.gas !== undefined ? { gas: call.gas } : {}),
     });
   }
 
   async sendCalls(
     chainId: number,
-    _calls: Call[]
+    _calls: EvmCall[]
   ): Promise<Address | Address[]> {
     const { smartWalletClient } = this.getClients(chainId);
     const suffix = this.builderCodeSuffix;
@@ -477,6 +482,10 @@ export class PrivyAlchemyEvmProviderAdapter implements IEvmProviderAdapter {
             ? appendBuilderCodeData(call.data ?? "0x", suffix)
             : call.data ?? "0x",
           ...(value !== 0n ? { value } : {}),
+          // Per-call gas hint, forwarded to the bundler so it doesn't
+          // underestimate. Best-effort: if the smart wallet client
+          // ignores the field, behavior is unchanged.
+          ...(call.gas !== undefined ? { gas: call.gas } : {}),
         };
       }),
       capabilities: {
diff --git a/src/providers/evm/viemProviderAdapter.ts b/src/providers/evm/viemProviderAdapter.ts
index db52e04..0ef55ee 100644
--- a/src/providers/evm/viemProviderAdapter.ts
+++ b/src/providers/evm/viemProviderAdapter.ts
@@ -1,7 +1,8 @@
-import type { Address, Call, Log, TransactionReceipt } from "viem";
+import type { Address, Log, TransactionReceipt } from "viem";
 
 import { createEvmNetworkContext } from "../../core/chains.js";
 import type {
+  EvmCall,
   GetLogsParams,
   IEvmProviderAdapter,
   ReadContractParams,
@@ -26,11 +27,11 @@ export class ViemProviderAdapter implements IEvmProviderAdapter {
     return createEvmNetworkContext(chainId);
   }
 
-  async sendTransaction(_chainId: number, _call: Call): Promise<Address> {
+  async sendTransaction(_chainId: number, _call: EvmCall): Promise<Address> {
     throw new Error("sendTransaction() not implemented. Override in subclass.");
   }
 
-  async sendCalls(_chainId: number, _calls: Call[]): Promise<Address | Address[]> {
+  async sendCalls(_chainId: number, _calls: EvmCall[]): Promise<Address | Address[]> {
     throw new Error("sendCalls() not implemented. Override in subclass.");
   }
 
diff --git a/src/providers/types.ts b/src/providers/types.ts
index cba4c49..0d54842 100644
--- a/src/providers/types.ts
+++ b/src/providers/types.ts
@@ -2,6 +2,19 @@ import type { Address, Call, Log, TransactionReceipt } from "viem";
 
 import type { NetworkContext, SolanaCluster } from "../core/chains.js";
 
+/**
+ * Call shape accepted by sendTransaction / sendCalls. Extends viem's Call
+ * with an optional `gas` field so callers can override the wallet's
+ * gas-limit estimate (useful when an aggregator like LiFi already
+ * supplies a padded recommended gas limit and the bundler's default
+ * estimate runs too tight).
+ *
+ * Pass-through is best-effort: implementations forward `gas` to the
+ * underlying viem/Alchemy client. If a particular backend ignores it,
+ * the bundler falls back to its own estimate (current behaviour).
+ */
+export type EvmCall = Call<unknown, { gas?: bigint }>;
+
 export type SolanaInstructionLike = {
   programId: string;
   keys: Array<{ pubkey: string; isSigner: boolean; isWritable: boolean }>;
@@ -31,8 +44,8 @@ export type GetLogsParams = {
 
 export interface IEvmProviderAdapter extends IProviderAdapter {
   getAddress(): Promise<Address>;
-  sendTransaction(chainId: number, call: Call): Promise<Address>;
-  sendCalls(chainId: number, calls: Call[]): Promise<Address | Address[]>;
+  sendTransaction(chainId: number, call: EvmCall): Promise<Address>;
+  sendCalls(chainId: number, calls: EvmCall[]): Promise<Address | Address[]>;
   getTransactionReceipt(
     chainId: number,
     hash: Address