COTI MCP Server

import { ToolAnnotations } from "@modelcontextprotocol/sdk/types.js"; import { getDefaultProvider, Wallet, Contract } from '@coti-io/coti-ethers'; import { buildInputText } from '@coti-io/coti-sdk-typescript'; import { getNetwork } from "../shared/account.js"; import { ERC20_ABI } from "../constants/abis.js"; import { z } from "zod"; /** * Tool definition for transferring private ERC20 tokens on the COTI blockchain */ export const TRANSFER_PRIVATE_ERC20_TOKEN: ToolAnnotations = { name: "transfer_private_erc20", description: "Transfer private ERC20 tokens on the COTI blockchain. " + "This is used for sending private tokens from your wallet to another address. " + "Requires token contract address, recipient address, and amount as input. " + "Returns the transaction hash upon successful transfer.", inputSchema: { private_key: z.string().describe("Private key of the account (tracked by AI from previous operations)"), aes_key: z.string().optional().describe("AES key for private transactions (tracked by AI). Required for private operations."), network: z.enum(['testnet', 'mainnet']).describe("Network to use: 'testnet' or 'mainnet' (required)."), token_address: z.string().describe("ERC20 token contract address on COTI blockchain"), recipient_address: z.string().describe("Recipient COTI address, e.g., 0x0D7C5C1DA069fd7C1fAFBeb922482B2C7B15D273"), amount_wei: z.string().describe("Amount of tokens to transfer (in Wei)"), gas_limit: z.string().optional().describe("Optional gas limit for the transaction"), }, }; /** * Type guard for validating transfer private ERC20 token arguments * @param args - Arguments to validate * @returns True if arguments are valid for transfer private ERC20 token operation */ export function isTransferPrivateERC20TokenArgs(args: unknown): args is { token_address: string, recipient_address: string, amount_wei: string, gas_limit?: string , private_key?: string, aes_key?: string, network: 'testnet' | 'mainnet' } { return ( typeof args === "object" && args !== null && "token_address" in args && typeof (args as { token_address: string }).token_address === "string" && "recipient_address" in args && typeof (args as { recipient_address: string }).recipient_address === "string" && "amount_wei" in args && (typeof (args as { amount_wei: string }).amount_wei === "string") && (!("gas_limit" in args) || typeof (args as { gas_limit: string }).gas_limit === "string") ); } /** * Handler for the transferPrivateERC20 tool * @param args The arguments for the tool * @returns The tool response */ export async function transferPrivateERC20TokenHandler(args: any): Promise<any> { if (!isTransferPrivateERC20TokenArgs(args)) { throw new Error("Invalid arguments for transfer_private_erc20"); } const { token_address, recipient_address, amount_wei, gas_limit, network, private_key, aes_key } = args; if (!private_key || !aes_key) { throw new Error("private_key and aes_key are required"); } const results = await performTransferPrivateERC20Token(private_key, aes_key, token_address, recipient_address, amount_wei, network, gas_limit); return { structuredContent: { transactionHash: results.transactionHash, tokenSymbol: results.tokenSymbol, tokenAddress: results.tokenAddress, recipientAddress: results.recipientAddress, amountWei: results.amountWei, transferFunctionSelector: results.transferFunctionSelector, sender: results.sender, gasLimit: results.gasLimit }, content: [{ type: "text", text: results.formattedText }], isError: false, }; } /** * Performs a private ERC20 token transfer on the COTI blockchain * @param token_address - Address of the ERC20 token contract * @param recipient_address - Address of the recipient * @param amount_wei - Amount to transfer in Wei * @param gas_limit - Optional gas limit for the transaction * @returns An object with transfer details and formatted text */ export async function performTransferPrivateERC20Token(private_key: string, aes_key: string, token_address: string, recipient_address: string, amount_wei: string, network: 'testnet' | 'mainnet', gas_limit?: string): Promise<{ transactionHash: string, tokenSymbol: string, tokenAddress: string, recipientAddress: string, amountWei: string, transferFunctionSelector: string, sender: string, gasLimit?: string, formattedText: string }> { try { const provider = getDefaultProvider(getNetwork(network)); const wallet = new Wallet(private_key, provider); wallet.setAesKey(aes_key); const tokenContract = new Contract(token_address, ERC20_ABI, wallet); const symbolResult = await tokenContract.symbol(); const txOptions: any = {}; if (gas_limit) { txOptions.gasLimit = gas_limit; } const transferSelector = tokenContract.transfer.fragment.selector; const encryptedInputText = buildInputText(BigInt(amount_wei), { wallet: wallet, userKey: aes_key }, token_address, transferSelector); const tx = await tokenContract.transfer(recipient_address, encryptedInputText, txOptions); const receipt = await tx.wait(); const formattedText = `Private Token Transfer Successful!\nToken: ${symbolResult}\nTransaction Hash: ${receipt?.hash}\nAmount in Wei: ${amount_wei}\nRecipient: ${recipient_address}\nTransfer Function Selector: ${transferSelector}`; return { transactionHash: receipt?.hash || '', tokenSymbol: symbolResult, tokenAddress: token_address, recipientAddress: recipient_address, amountWei: amount_wei, transferFunctionSelector: transferSelector, sender: wallet.address, gasLimit: gas_limit, formattedText }; } catch (error) { console.error('Error transferring private ERC20 tokens:', error); throw new Error(`Failed to transfer private ERC20 tokens: ${error instanceof Error ? error.message : String(error)}`); } }