fix: remove hardcoded gas, fix estimation, sdk improvements

cspell-config/cspell-misc.txt

@@ -9,6 +9,7 @@ Nuxt
 nuxtjs
 testid
 vueuse
+ethereum
 
 // examples/bank-demo
 ctap
@@ -25,4 +26,3 @@ usdc
 // examples/nft-quest
 Fren
 fren
-trxn

examples/demo-app/pages/index.vue

@@ -40,7 +40,7 @@
 </template>
 
 <script lang="ts" setup>
-import { disconnect, getBalance, watchAccount, sendTransaction, createConfig, connect, reconnect, type GetBalanceReturnType } from "@wagmi/core";
+import { disconnect, getBalance, watchAccount, sendTransaction, createConfig, connect, reconnect, waitForTransactionReceipt, type GetBalanceReturnType } from "@wagmi/core";
 import { zksyncSsoConnector } from "zksync-sso/connector";
 import { zksyncInMemoryNode } from "@wagmi/core/chains";
 import { createWalletClient, http, parseEther, type Address } from "viem";
@@ -142,15 +142,17 @@ const sendTokens = async () => {
   errorMessage.value = "";
   isSendingEth.value = true;
   try {
-    await sendTransaction(wagmiConfig, {
+    const transactionHash = await sendTransaction(wagmiConfig, {
       to: testTransferTarget,
       value: parseEther("0.1"),
-      gas: 100_000_000n,
     });
 
     balance.value = await getBalance(wagmiConfig, {
       address: address.value,
     });
+
+    const receipt = await waitForTransactionReceipt(wagmiConfig, { hash: transactionHash });
+    if (receipt.status === "reverted") throw new Error("Transaction reverted");
   } catch (error) {
     // eslint-disable-next-line no-console
     console.error("Transaction failed:", error);

examples/nft-quest/composables/useMintNft.ts

@@ -1,5 +1,5 @@
-import { estimateGas, waitForTransactionReceipt, writeContract } from "@wagmi/core";
-import { type Address, encodeFunctionData } from "viem";
+import { waitForTransactionReceipt, writeContract } from "@wagmi/core";
+import type { Address } from "viem";
 import { getGeneralPaymasterInput } from "viem/zksync";
 
 export const useMintNft = async (_address: MaybeRef<Address>) => {
@@ -10,24 +10,11 @@ export const useMintNft = async (_address: MaybeRef<Address>) => {
     const { wagmiConfig } = storeToRefs(useConnectorStore());
 
     const mintingForAddress = address.value;
-    const data = encodeFunctionData({
-      abi: nftAbi,
-      functionName: "mint",
-      args: [address.value],
-    });
-
-    const estimatedGas = await estimateGas(wagmiConfig.value, {
-      to: runtimeConfig.public.contracts.nft as Address,
-      chainId: runtimeConfig.public.chain.id,
-      data,
-    });
-
     const transactionHash = await writeContract(wagmiConfig.value, {
       address: runtimeConfig.public.contracts.nft as Address,
       abi: nftAbi,
       functionName: "mint",
       args: [mintingForAddress],
-      gas: estimatedGas + (estimatedGas / 100n * 25n), // gas may be underestimated
       paymaster: runtimeConfig.public.contracts.paymaster as Address,
       paymasterInput: getGeneralPaymasterInput({ innerInput: "0x" }),
     });

examples/nft-quest/nuxt.config.ts

@@ -102,4 +102,14 @@ export default defineNuxtConfig({
       },
     },
   },
+
+  vite: {
+    css: {
+      preprocessorOptions: {
+        scss: {
+          api: "modern", // Fix warning: "The legacy JS API is deprecated and will be removed in Dart Sass 2.0.0"
+        },
+      },
+    },
+  },
 });

packages/auth-server/nuxt.config.ts

@@ -57,4 +57,14 @@ export default defineNuxtConfig({
       chainId: parseInt(process.env.NUXT_PUBLIC_DEFAULT_CHAIN_ID || "") || zksyncInMemoryNode.id,
     },
   },
+
+  vite: {
+    css: {
+      preprocessorOptions: {
+        scss: {
+          api: "modern", // Fix warning: "The legacy JS API is deprecated and will be removed in Dart Sass 2.0.0"
+        },
+      },
+    },
+  },
 });

packages/contracts/test/PasskeyModule.ts

@@ -220,9 +220,6 @@ async function rawVerify(
   const hashedData = await toHash(concat([authDataBuffer, clientDataHash]));
   const rs = unwrapEC2Signature(toBuffer(b64SignedChallange));
   const publicKeys = await getPublicKey(publicKeyEs256Bytes);
-  /* console.log("externalSignature", ethers.hexlify(hashedData));
-  console.log("rs", ethers.hexlify(rs[0]), ethers.hexlify(rs[1]));
-  console.log("pubkey xy", publicKeys); */
   return await passkeyValidator.rawVerify(hashedData, rs, publicKeys);
 }
 

packages/contracts/test/SessionKeyTest.ts

@@ -311,7 +311,6 @@ describe("SessionKeyModule tests", function () {
       await tester.sendTxSuccess({
         to: sessionTarget,
         value: parseEther("0.01"),
-        gasLimit: 10_000_000n,
       });
       expect(await provider.getBalance(sessionTarget))
         .to.equal(parseEther("0.01"), "session target should have received the funds");

packages/sdk/README.md

@@ -1,3 +1,107 @@
-# zksync-sso
+# zksync-sso SDK
 
-ZKsync SSO SDK
+[![License](https://img.shields.io/badge/license-MIT-blue)](LICENSE-MIT)
+[![CI](https://github.com/matter-labs/zksync-account-sdk/actions/workflows/ci.yml/badge.svg)](https://github.com/matter-labs/zksync-account-sdk/actions/workflows/ci.yml)
+
+A user & developer friendly modular smart account implementation on ZKsync;
+simplifying user authentication, session management, and transaction processing.
+
+## Features and Goals
+
+<!-- prettier-ignore -->
+> [!CAUTION]
+> ZKsync SSO is under active development and is not yet feature
+> complete. Use it to improve your development applications and tooling. Please
+> do not use it in production environments.
+
+- 🧩 Modular smart accounts based on
+  [ERC-7579](https://eips.ethereum.org/EIPS/eip-7579#modules)
+- 🔑 Passkey authentication (no seed phrases)
+- ⏰ Sessions w/ easy configuration and management
+- 💰 Integrated paymaster support
+- ❤️‍🩹 Account recovery _(Coming Soon)_
+- 💻 Simple SDKs : JavaScript, iOS/Android _(Coming Soon)_
+- 🤝 Open-source authentication server
+- 🎓 Examples to get started quickly
+
+## Getting started
+
+Install the ZKsync SSO SDK package:
+
+```sh
+npm i zksync-sso
+```
+
+Add ZKsync SSO connector to your app (using `wagmi`):
+
+```ts
+import { zksyncSepoliaTestnet } from "viem/chains";
+import { createConfig, connect } from "@wagmi/core";
+import { zksyncSsoConnector } from "zksync-sso/connector";
+
+const ssoConnector = zksyncSsoConnector({
+  // Optional session configuration,
+  // if omitted user will have to sign every transaction via Auth Server
+  session: {
+    // Allow up to 0.1 ETH to be spend in gas fees
+    feeLimit: parseEther("0.1"),
+
+    transfers: [
+      // Allow ETH transfers of up to 0.1 ETH to specific address
+      {
+        to: "0x188bd99cd7D4d78d4E605Aeea12C17B32CC3135A",
+        valueLimit: parseEther("0.1"),
+      },
+
+      // Allow ETH transfers to specific address with a limit of 0.1 ETH per hour
+      // until the session expires
+      {
+        to: "0x188bd99cd7D4d78d4E605Aeea12C17B32CC3135A",
+        valueLimit: {
+            limit: parseEther("0.1"),
+            period: BigInt(60 * 60), // 1 hour in seconds
+        },
+      },
+    ],
+
+    // Allow calling specific smart contracts (e.g. ERC20 transfer):
+    contractCalls: [
+      {
+        address: "0xa1cf087DB965Ab02Fb3CFaCe1f5c63935815f044",
+        function: "transfer(address,uint256)",
+
+        // Optional call constraints (unconstrained otherwise):
+        constraints: [
+
+          // Only allow transfers to this address
+          {
+            index: 0,
+            condition: "Equal",
+            refValue: pad("0x6cC8cf7f6b488C58AA909B77E6e65c631c204784"),
+          },
+
+          // Transfer up to 0.2 tokens
+          {
+            index: 1,
+            limit: parseUnits("0.2", TOKEN.decimals), // Unlimited if omitted
+          },
+        ],
+      },
+    ],
+  },
+});
+
+const wagmiConfig = createConfig({
+   connectors: [ssoConnector],
+   ..., // your wagmi config https://wagmi.sh/core/api/createConfig
+});
+
+const connectWithSSO = () => {
+   connect(wagmiConfig, {
+      connector: ssoConnector,
+      chainId: zksyncSepoliaTestnet.id, // or another chain id that has SSO support
+   });
+};
+```
+
+[Find more information here in our docs.](https://docs.zksync.io/build/zksync-sso)

packages/sdk/prepare-package.mjs

@@ -1,20 +1,16 @@
 import { promises as fs } from "fs";
 import path from "path";
 
-// Define the path to the package.json
-const packageJsonPath = path.resolve("./package.json");
-console.log(packageJsonPath);
-
-// Get the version from environment variables
 const version = process.env.INPUT_VERSION;
 if (!version) {
   console.error("Error: INPUT_VERSION is required.");
   process.exit(1);
 }
 
+const packageJsonPath = path.resolve("./package.json");
+
 async function preparePackageJson() {
   try {
-    // Read the existing package.json
     const packageJsonData = await fs.readFile(packageJsonPath, "utf8");
     const packageJson = JSON.parse(packageJsonData);
 

packages/sdk/src/client-auth-server/Signer.ts

@@ -20,6 +20,7 @@ type Account = {
 interface SignerInterface {
   accounts: Address[];
   chain: Chain;
+  getClient(parameters?: { chainId?: number }): ZksyncSsoSessionClient;
   handshake(): Promise<Address[]>;
   request<TMethod extends Method>(request: RequestArguments<TMethod>): Promise<ExtractReturnType<TMethod>>;
   disconnect: () => Promise<void>;
@@ -83,6 +84,15 @@ export class Signer implements SignerInterface {
     }
   }
 
+  getClient(parameters?: { chainId?: number }) {
+    const chainId = parameters?.chainId || this.chain.id;
+    const chain = this.chains.find((e) => e.id === chainId);
+    if (!chain) throw new Error(`Chain with id ${chainId} is not supported`);
+
+    if (!this.walletClient) throw new Error("Wallet client is not created");
+    return this.walletClient;
+  }
+
   private get account(): Account | null {
     const account = this._account.get();
     if (!account) return null;

packages/sdk/src/client-auth-server/WalletProvider.ts

@@ -52,6 +52,10 @@ export class WalletProvider extends EventEmitter implements ProviderInterface {
     return this.signer.accounts.length > 0;
   }
 
+  public getClient(parameters?: { chainId?: number }) {
+    return this.signer.getClient(parameters);
+  }
+
   public async request<M extends Method>(request: RequestArguments<M>): Promise<ExtractReturnType<M>> {
     try {
       switch (request.method) {

packages/sdk/src/client-auth-server/interface.ts

@@ -1,6 +1,7 @@
 import { EventEmitter } from "eventemitter3";
 import type { RpcSchema as RpcSchemaGeneric } from "viem";
 
+import type { ZksyncSsoSessionClient } from "../client/index.js";
 import type { ExtractParams, ExtractReturnType, Method, RpcSchema } from "./rpc.js";
 
 export interface RequestArguments<M extends Method<TSchema>, TSchema extends RpcSchemaGeneric = RpcSchema> {
@@ -26,6 +27,7 @@ interface ProviderConnectInfo {
 export interface ProviderInterface extends EventEmitter {
   request<M extends Method>(args: RequestArguments<M>): Promise<ExtractReturnType<M>>;
   disconnect(): Promise<void>;
+  getClient(parameters?: { chainId?: number }): Promise<ZksyncSsoSessionClient> | ZksyncSsoSessionClient;
   on(event: "connect", listener: (info: ProviderConnectInfo) => void): this;
   on(event: "disconnect", listener: (error: ProviderRpcError) => void): this;
   on(event: "chainChanged", listener: (chainId: string) => void): this;