added write functionalities ie, swap and transfer

examples/agent-kit-langgraph/src/tools/swap.ts

@@ -0,0 +1,45 @@
+import { agentKit } from "../utils/solanaAgent";
+import { tool } from "@langchain/core/tools";
+import { z } from "zod";
+import { PublicKey } from "@solana/web3.js";
+
+export const swapTool = tool(
+  async ({ outputMint, inputAmount, inputMint, inputDecimal }) => {
+    try {
+      const inputAmountWithDecimals = inputAmount * 10 ** inputDecimal;
+      const outputMintAddress = new PublicKey(outputMint);
+      const inputMintAddress = new PublicKey(inputMint);
+
+      console.log(inputAmountWithDecimals, outputMintAddress, inputMintAddress);
+      const tx = await agentKit.trade(
+        outputMintAddress,
+        inputAmountWithDecimals,
+        inputMintAddress,
+        200,
+      );
+      return tx;
+    } catch (error) {
+      console.error(error);
+      return "error";
+    }
+  },
+  {
+    name: "swap",
+    description:
+      "call to swap/trade tokens from one token to the other using Jupiter exchange",
+    schema: z.object({
+      outputMint: z
+        .string()
+        .describe("The mint address of destination token to be swapped to"),
+      inputAmount: z
+        .number()
+        .describe(
+          "the input amount of the token to be swapped without adding any decimals",
+        ),
+      inputMint: z.string().describe("The mint address of the origin token "),
+      inputDecimal: z
+        .number()
+        .describe("The decimal of the input token that is being traded"),
+    }),
+  },
+);