Add paymaster to CdpSmartWallet

typescript/.changeset/tame-eggs-rush.md

@@ -0,0 +1,6 @@
+---
+"@coinbase/agentkit": patch
+"create-onchain-agent": patch
+---
+
+Added paymaster capability to CdpSmartWallet

typescript/agentkit/src/action-providers/cdp/cdpApiActionProvider.ts

@@ -120,6 +120,8 @@ Example usage:
             amount: args.amount,
             slippageBps: 100, // 1% slippage tolerance
             // eslint-disable-next-line @typescript-eslint/no-explicit-any
+            paymasterUrl: (walletProvider as any).getPaymasterUrl?.(),
+            // eslint-disable-next-line @typescript-eslint/no-explicit-any
           } as any);
 
           return `Successfully swapped ${args.amount} ${args.fromAssetId.toUpperCase()} to ${args.toAssetId.toUpperCase()}. Transaction hash: ${swapResult.transactionHash}`;

typescript/agentkit/src/wallet-providers/cdpShared.ts

@@ -48,6 +48,11 @@ export interface CdpSmartWalletProviderConfig extends CdpWalletProviderConfig {
    * The name of the smart wallet.
    */
   smartAccountName?: string;
+
+  /**
+   * The paymaster URL for gasless transactions.
+   */
+  paymasterUrl?: string;
 }
 
 /**

typescript/agentkit/src/wallet-providers/cdpSmartWalletProvider.ts

@@ -42,6 +42,11 @@ interface ConfigureCdpSmartWalletProviderWithWalletOptions {
    * The network of the wallet.
    */
   network: Network;
+
+  /**
+   * The paymaster URL for gasless transactions.
+   */
+  paymasterUrl?: string;
 }
 
 /**
@@ -53,6 +58,7 @@ export class CdpSmartWalletProvider extends EvmWalletProvider implements WalletP
   #ownerAccount: LocalAccount | EvmServerAccount;
   #cdp: CdpClient;
   #network: Network;
+  #paymasterUrl?: string;
 
   /**
    * Constructs a new CdpSmartWalletProvider.
@@ -67,6 +73,7 @@ export class CdpSmartWalletProvider extends EvmWalletProvider implements WalletP
     this.#cdp = config.cdp;
     this.#publicClient = config.publicClient;
     this.#network = config.network;
+    this.#paymasterUrl = config.paymasterUrl;
   }
 
   /**
@@ -83,6 +90,7 @@ export class CdpSmartWalletProvider extends EvmWalletProvider implements WalletP
     const apiKeySecret = config.apiKeySecret || process.env.CDP_API_KEY_SECRET;
     const walletSecret = config.walletSecret || process.env.CDP_WALLET_SECRET;
     const idempotencyKey = config.idempotencyKey || process.env.IDEMPOTENCY_KEY;
+    const paymasterUrl = config.paymasterUrl || process.env.PAYMASTER_URL;
 
     if (!apiKeyId || !apiKeySecret || !walletSecret) {
       throw new Error(
@@ -144,6 +152,7 @@ export class CdpSmartWalletProvider extends EvmWalletProvider implements WalletP
       smartAccount,
       ownerAccount,
       network,
+      paymasterUrl,
     });
   }
 
@@ -225,6 +234,7 @@ export class CdpSmartWalletProvider extends EvmWalletProvider implements WalletP
       smartAccount: this.#smartAccount,
       network: this.#getCdpSdkNetwork(),
       calls,
+      paymasterUrl: this.#paymasterUrl,
     });
 
     return userOperation.userOpHash as Hex;
@@ -266,6 +276,15 @@ export class CdpSmartWalletProvider extends EvmWalletProvider implements WalletP
     return this.#cdp;
   }
 
+  /**
+   * Gets the paymaster URL for gasless transactions.
+   *
+   * @returns The paymaster URL if configured, undefined otherwise.
+   */
+  getPaymasterUrl(): string | undefined {
+    return this.#paymasterUrl;
+  }
+
   /**
    * Gets the balance of the smart wallet.
    *

typescript/create-onchain-agent/templates/prepareAgentkit/agentkit/evm/smart/prepareAgentkit.ts

@@ -98,7 +98,7 @@ export async function prepareAgentkitAndWalletProvider(): Promise<{
       // eslint-disable-next-line @typescript-eslint/no-explicit-any
       owner: owner as any,
       smartWalletAddress: walletData?.smartWalletAddress,
-      paymasterUrl: undefined, // Sponsor transactions: https://docs.cdp.coinbase.com/paymaster/docs/welcome
+      paymasterUrl: process.env.PAYMASTER_URL, // Sponsor transactions: https://docs.cdp.coinbase.com/paymaster/docs/welcome
     });
 
     // Initialize AgentKit: https://docs.cdp.coinbase.com/agentkit/docs/agent-actions

typescript/examples/langchain-cdp-smart-wallet-chatbot/.env-local

@@ -5,4 +5,5 @@ CDP_API_KEY_SECRET=
 
 # Optional
 PRIVATE_KEY=
-NETWORK_ID=
+NETWORK_ID=
+PAYMASTER_URL=

typescript/examples/langchain-cdp-smart-wallet-chatbot/README.md

@@ -41,6 +41,7 @@ Once you have them, rename the `.env-local` file to `.env` and make sure you set
 #### Optional:
   - `PRIVATE_KEY=` *(if not provided, a new key will be generated)*
   - `NETWORK_ID=` *(defaults to base-sepolia if not set)*
+  - `PAYMASTER_URL=` 
 
 ## Running the example
 

typescript/examples/langchain-cdp-smart-wallet-chatbot/chatbot.ts

@@ -105,7 +105,7 @@ async function initializeAgent() {
       // eslint-disable-next-line @typescript-eslint/no-explicit-any
       owner: owner as any,
       networkId,
-      // paymasterUrl: undefined, // Sponsor transactions: https://docs.cdp.coinbase.com/paymaster/docs/welcome
+      paymasterUrl: process.env.PAYMASTER_URL, // Sponsor transactions: https://docs.cdp.coinbase.com/paymaster/docs/welcome
     });
 
     // Initialize AgentKit