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writeContract tool can now send value with function call #3

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writeContract tool can now send value with function call #3

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7 changes: 6 additions & 1 deletion src/core/tools.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -687,9 +687,10 @@ export function registerEVMTools(server: McpServer) {
abi: z.array(z.any()).describe("The ABI (Application Binary Interface) of the smart contract function, as a JSON array"),
functionName: z.string().describe("The name of the function to call on the contract (e.g., 'transfer')"),
args: z.array(z.any()).describe("The arguments to pass to the function, as an array (e.g., ['0x1234...', '1000000000000000000'])"),
value: z.string().optional().describe("The amount of native token (in wei) to send with the transaction"),
network: z.string().optional().describe("Network name (e.g., 'sei', 'sei-testnet', 'sei-devnet') or chain ID. Defaults to Sei mainnet.")
},
async ({ contractAddress, abi, functionName, args, network = DEFAULT_NETWORK }) => {
async ({ contractAddress, abi, functionName, args, value, network = DEFAULT_NETWORK }) => {
try {
// Parse ABI if it's a string
const parsedAbi = typeof abi === 'string' ? JSON.parse(abi) : abi;
Expand All @@ -701,6 +702,10 @@ export function registerEVMTools(server: McpServer) {
args
};

if (value) {
contractParams.value = BigInt(value); // ensure it's bigint
}

const txHash = await services.writeContract(
contractParams,
network
Expand Down