[SDK] Fallback to onchain nonce in 7702 execution (#7729)

Author: joaquim-verges

.changeset/silly-bugs-clean.md

@@ -0,0 +1,5 @@
+---
+"thirdweb": patch
+---
+
+Fallback to onchain nonce in 7702 execution

apps/playground-web/src/components/account-abstraction/7702-smart-account.tsx

@@ -101,6 +101,7 @@ export function Eip7702SmartAccountPreview() {
                   setTxHash(null);
                 }}
                 onError={(error) => {
+                  console.error("minting error", error);
                   alert(`Error: ${error.message}`);
                 }}
                 onTransactionSent={async (tx) => {

packages/thirdweb/src/transaction/actions/estimate-gas.ts

@@ -2,7 +2,6 @@ import * as ox__Hex from "ox/Hex";
 import { formatTransactionRequest } from "viem";
 import { roundUpGas } from "../../gas/op-gas-fee-reducer.js";
 import { getAddress } from "../../utils/address.js";
-import { hexToBytes } from "../../utils/encoding/to-bytes.js";
 import { resolvePromisedValue } from "../../utils/promise/resolve-promised-value.js";
 import type { Prettify } from "../../utils/type-utils.js";
 import type { Account } from "../../wallets/interfaces/wallet.js";
@@ -117,31 +116,20 @@ export async function estimateGas(
 
     const rpcRequest = getRpcClient(options.transaction);
     try {
-      let gas = await eth_estimateGas(
-        rpcRequest,
-        formatTransactionRequest({
-          authorizationList: authorizationList?.map((auth) => ({
-            ...auth,
-            contractAddress: getAddress(auth.address),
-            nonce: Number(auth.nonce),
-            r: ox__Hex.fromNumber(auth.r),
-            s: ox__Hex.fromNumber(auth.s),
-          })),
-          data: encodedData,
-          from: fromAddress ? getAddress(fromAddress) : undefined,
-          to: toAddress ? getAddress(toAddress) : undefined,
-          value,
-          ...(authorizationList && authorizationList?.length > 0
-            ? {
-                gas:
-                  minGas(
-                    hexToBytes(encodedData),
-                    BigInt(authorizationList?.length ?? 0),
-                  ) + 100_000n,
-              }
-            : {}),
-        }),
-      );
+      const formattedTx = formatTransactionRequest({
+        authorizationList: authorizationList?.map((auth) => ({
+          ...auth,
+          contractAddress: getAddress(auth.address),
+          nonce: Number(auth.nonce),
+          r: ox__Hex.fromNumber(auth.r),
+          s: ox__Hex.fromNumber(auth.s),
+        })),
+        data: encodedData,
+        from: fromAddress ? getAddress(fromAddress) : undefined,
+        to: toAddress ? getAddress(toAddress) : undefined,
+        value,
+      });
+      let gas = await eth_estimateGas(rpcRequest, formattedTx);
 
       if (options.transaction.chain.experimental?.increaseZeroByteCount) {
         gas = roundUpGas(gas);
@@ -158,19 +146,3 @@ export async function estimateGas(
   cache.set(txWithFrom, promise);
   return promise;
 }
-
-// EIP-7623 + EIP-7702 floor calculation
-const TxGas = 21_000n;
-const TxCostFloorPerToken = 10n; // params.TxCostFloorPerToken
-const TxTokenPerNonZero = 4n; // params.TxTokenPerNonZeroByte
-const TxAuthTupleGas = 12_500n;
-
-function minGas(data: Uint8Array, authCount = 0n) {
-  let nz = 0n;
-  for (const b of data) if (b !== 0) nz++;
-  const z = BigInt(data.length) - nz;
-  const tokens = nz * TxTokenPerNonZero + z;
-  const floor = TxGas + tokens * TxCostFloorPerToken;
-  const intrinsic = TxGas + authCount * TxAuthTupleGas;
-  return floor > intrinsic ? floor : intrinsic;
-}