feat: add close accounts and reclaim rent

src/langchain/index.ts

@@ -1825,6 +1825,34 @@ export class SolanaCancelNFTListingTool extends Tool {
   }
 }
 
+export class CloseEmptyTokenAccounts extends Tool {
+  name = "close_empty_token_accounts";
+  description = `Close all empty spl-token accounts and reclaim the rent`;
+
+  constructor(private solanaKit: SolanaAgentKit) {
+    super();
+  }
+
+  protected async _call(): Promise<string> {
+    try {
+      const { signature, size } =
+        await this.solanaKit.closeEmptyTokenAccounts();
+
+      return JSON.stringify({
+        status: "success",
+        message: `${size} accounts closed successfully. ${size === 48 ? "48 accounts can be closed in a single transaction try again to close more accounts" : ""}`,
+        signature,
+      });
+    } catch (error: any) {
+      return JSON.stringify({
+        status: "error",
+        message: error.message,
+        code: error.code || "UNKNOWN_ERROR",
+      });
+    }
+  }
+}
+
 export function createSolanaTools(solanaKit: SolanaAgentKit) {
   return [
     new SolanaBalanceTool(solanaKit),
@@ -1873,5 +1901,6 @@ export function createSolanaTools(solanaKit: SolanaAgentKit) {
     new SolanaTipLinkTool(solanaKit),
     new SolanaListNFTForSaleTool(solanaKit),
     new SolanaCancelNFTListingTool(solanaKit),
+    new CloseEmptyTokenAccounts(solanaKit),
   ];
 }