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waiaas

by minhoyoo-iotrust
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call_contract

Call whitelisted smart contracts on EVM and Solana. Provide contract address and transaction data to interact with on-chain protocols.

Instructions

Call a whitelisted smart contract. Requires CONTRACT_WHITELIST policy. For EVM: provide calldata (hex). For Solana: provide programId + instructionData + accounts.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
toYesContract address
calldataNoHex-encoded calldata (EVM)
abiNoABI fragment for decoding (EVM)
valueNoNative token value in smallest units (wei). Example: "1000000000000000000" = 1 ETH
programIdNoProgram ID (Solana)
instructionDataNoBase64-encoded instruction data (Solana)
accountsNoAccount metas (Solana)
networkNoTarget network (e.g., "polygon-mainnet" or CAIP-2 "eip155:137"). Required for EVM wallets; auto-resolved for Solana.
wallet_idNoTarget wallet ID. Required for multi-wallet sessions; auto-resolved when session has a single wallet.
gas_conditionNoGas price condition for deferred execution. At least one of max_gas_price or max_priority_fee required.

Implementation Reference

  • packages/mcp/src/tools/call-contract.ts:14-59 (handler)
    Primary handler: registers call_contract tool on the MCP server. Builds a CONTRACT_CALL request body with optional EVM (to, calldata, abi, value) and Solana (programId, instructionData, accounts) parameters, plus network, wallet_id, and gas_condition. Sends POST /v1/transactions/send and returns the result.
    export function registerCallContract(server: McpServer, apiClient: ApiClient, walletContext?: WalletContext): void {
  server.tool(
    'call_contract',
    withWalletPrefix('Call a whitelisted smart contract. Requires CONTRACT_WHITELIST policy. For EVM: provide calldata (hex). For Solana: provide programId + instructionData + accounts.', walletContext?.walletName),
    {
      to: z.string().describe('Contract address'),
      calldata: z.string().optional().describe('Hex-encoded calldata (EVM)'),
      abi: z.array(z.record(z.string(), z.unknown())).optional().describe('ABI fragment for decoding (EVM)'),
      value: z.string().optional().describe('Native token value in smallest units (wei). Example: "1000000000000000000" = 1 ETH'),
      programId: z.string().optional().describe('Program ID (Solana)'),
      instructionData: z.string().optional().describe('Base64-encoded instruction data (Solana)'),
      accounts: z.array(z.object({
        pubkey: z.string(),
        isSigner: z.boolean(),
        isWritable: z.boolean(),
      })).optional().describe('Account metas (Solana)'),
      network: z.string().optional().describe('Target network (e.g., "polygon-mainnet" or CAIP-2 "eip155:137"). Required for EVM wallets; auto-resolved for Solana.'),
      wallet_id: z.string().optional().describe('Target wallet ID. Required for multi-wallet sessions; auto-resolved when session has a single wallet.'),
      gas_condition: z.object({
        max_gas_price: z.string().optional().describe('Max gas price in wei (EVM baseFee+priorityFee)'),
        max_priority_fee: z.string().optional().describe('Max priority fee in wei (EVM) or micro-lamports (Solana)'),
        timeout: z.number().optional().describe('Max wait time in seconds (60-86400)'),
      }).optional().describe('Gas price condition for deferred execution. At least one of max_gas_price or max_priority_fee required.'),
    },
    async (args) => {
      const body: Record<string, unknown> = { type: 'CONTRACT_CALL', to: args.to };
      if (args.calldata !== undefined) body.calldata = args.calldata;
      if (args.abi !== undefined) body.abi = args.abi;
      if (args.value !== undefined) body.value = args.value;
      if (args.programId !== undefined) body.programId = args.programId;
      if (args.instructionData !== undefined) body.instructionData = args.instructionData;
      if (args.accounts !== undefined) body.accounts = args.accounts;
      if (args.network !== undefined) body.network = args.network;
      if (args.wallet_id) body.walletId = args.wallet_id;
      if (args.gas_condition) {
        body.gasCondition = {
          maxGasPrice: args.gas_condition.max_gas_price,
          maxPriorityFee: args.gas_condition.max_priority_fee,
          timeout: args.gas_condition.timeout,
        };
      }
      const result = await apiClient.post('/v1/transactions/send', body);
      return toToolResult(result);
    },
  );
}
  • packages/mcp/src/tools/call-contract.ts:18-37 (schema)
    Input schema using Zod: defines all parameters including to (required), calldata, abi, value for EVM, and programId, instructionData, accounts for Solana, plus network, wallet_id, and gas_condition.
    {
  to: z.string().describe('Contract address'),
  calldata: z.string().optional().describe('Hex-encoded calldata (EVM)'),
  abi: z.array(z.record(z.string(), z.unknown())).optional().describe('ABI fragment for decoding (EVM)'),
  value: z.string().optional().describe('Native token value in smallest units (wei). Example: "1000000000000000000" = 1 ETH'),
  programId: z.string().optional().describe('Program ID (Solana)'),
  instructionData: z.string().optional().describe('Base64-encoded instruction data (Solana)'),
  accounts: z.array(z.object({
    pubkey: z.string(),
    isSigner: z.boolean(),
    isWritable: z.boolean(),
  })).optional().describe('Account metas (Solana)'),
  network: z.string().optional().describe('Target network (e.g., "polygon-mainnet" or CAIP-2 "eip155:137"). Required for EVM wallets; auto-resolved for Solana.'),
  wallet_id: z.string().optional().describe('Target wallet ID. Required for multi-wallet sessions; auto-resolved when session has a single wallet.'),
  gas_condition: z.object({
    max_gas_price: z.string().optional().describe('Max gas price in wei (EVM baseFee+priorityFee)'),
    max_priority_fee: z.string().optional().describe('Max priority fee in wei (EVM) or micro-lamports (Solana)'),
    timeout: z.number().optional().describe('Max wait time in seconds (60-86400)'),
  }).optional().describe('Gas price condition for deferred execution. At least one of max_gas_price or max_priority_fee required.'),
},
  • packages/mcp/src/tools/call-contract.ts:14-59 (registration)
    Registration: exports registerCallContract which calls server.tool('call_contract', ...) to register the tool with the MCP server.
    export function registerCallContract(server: McpServer, apiClient: ApiClient, walletContext?: WalletContext): void {
  server.tool(
    'call_contract',
    withWalletPrefix('Call a whitelisted smart contract. Requires CONTRACT_WHITELIST policy. For EVM: provide calldata (hex). For Solana: provide programId + instructionData + accounts.', walletContext?.walletName),
    {
      to: z.string().describe('Contract address'),
      calldata: z.string().optional().describe('Hex-encoded calldata (EVM)'),
      abi: z.array(z.record(z.string(), z.unknown())).optional().describe('ABI fragment for decoding (EVM)'),
      value: z.string().optional().describe('Native token value in smallest units (wei). Example: "1000000000000000000" = 1 ETH'),
      programId: z.string().optional().describe('Program ID (Solana)'),
      instructionData: z.string().optional().describe('Base64-encoded instruction data (Solana)'),
      accounts: z.array(z.object({
        pubkey: z.string(),
        isSigner: z.boolean(),
        isWritable: z.boolean(),
      })).optional().describe('Account metas (Solana)'),
      network: z.string().optional().describe('Target network (e.g., "polygon-mainnet" or CAIP-2 "eip155:137"). Required for EVM wallets; auto-resolved for Solana.'),
      wallet_id: z.string().optional().describe('Target wallet ID. Required for multi-wallet sessions; auto-resolved when session has a single wallet.'),
      gas_condition: z.object({
        max_gas_price: z.string().optional().describe('Max gas price in wei (EVM baseFee+priorityFee)'),
        max_priority_fee: z.string().optional().describe('Max priority fee in wei (EVM) or micro-lamports (Solana)'),
        timeout: z.number().optional().describe('Max wait time in seconds (60-86400)'),
      }).optional().describe('Gas price condition for deferred execution. At least one of max_gas_price or max_priority_fee required.'),
    },
    async (args) => {
      const body: Record<string, unknown> = { type: 'CONTRACT_CALL', to: args.to };
      if (args.calldata !== undefined) body.calldata = args.calldata;
      if (args.abi !== undefined) body.abi = args.abi;
      if (args.value !== undefined) body.value = args.value;
      if (args.programId !== undefined) body.programId = args.programId;
      if (args.instructionData !== undefined) body.instructionData = args.instructionData;
      if (args.accounts !== undefined) body.accounts = args.accounts;
      if (args.network !== undefined) body.network = args.network;
      if (args.wallet_id) body.walletId = args.wallet_id;
      if (args.gas_condition) {
        body.gasCondition = {
          maxGasPrice: args.gas_condition.max_gas_price,
          maxPriorityFee: args.gas_condition.max_priority_fee,
          timeout: args.gas_condition.timeout,
        };
      }
      const result = await apiClient.post('/v1/transactions/send', body);
      return toToolResult(result);
    },
  );
}
  • packages/mcp/src/server.ts:100-101 (registration)
    Registration call site: imports and invokes registerCallContract from server.ts to wire the tool into the MCP server factory.
    registerCallContract(server, apiClient, walletContext);
registerApproveToken(server, apiClient, walletContext);
  • packages/openclaw-plugin/src/tools/utility.ts:78-130 (helper)
    Alternative registration in the openclaw-plugin package: registers call_contract tool with input schema and handler via PluginApi.registerTool. Same CONTRACT_CALL logic posting to /v1/transactions/send.
    // Tool 12: call_contract
api.registerTool({
  name: 'call_contract',
  description: 'Call a whitelisted smart contract. Requires CONTRACT_WHITELIST policy. For EVM: provide calldata (hex). For Solana: provide programId + instructionData + accounts.',
  inputSchema: {
    type: 'object',
    properties: {
      to: { type: 'string', description: 'Contract address' },
      calldata: { type: 'string', description: 'Hex-encoded calldata (EVM)' },
      value: { type: 'string', description: 'Native token value in smallest units (wei).' },
      programId: { type: 'string', description: 'Program ID (Solana)' },
      instructionData: { type: 'string', description: 'Base64-encoded instruction data (Solana)' },
      accounts: {
        type: 'array',
        description: 'Account metas (Solana)',
        items: {
          type: 'object',
          properties: {
            pubkey: { type: 'string' },
            isSigner: { type: 'boolean' },
            isWritable: { type: 'boolean' },
          },
        },
      },
      network: { type: 'string', description: 'Target network.' },
      wallet_id: { type: 'string', description: 'Target wallet ID.' },
      gas_condition: {
        type: 'object',
        properties: {
          max_gas_price: { type: 'string' },
          max_priority_fee: { type: 'string' },
          timeout: { type: 'number' },
        },
      },
    },
    required: ['to'],
  },
  handler: async (args) => {
    const body: Record<string, unknown> = { type: 'CONTRACT_CALL', to: args['to'] };
    if (args['calldata'] !== undefined) body['calldata'] = args['calldata'];
    if (args['value'] !== undefined) body['value'] = args['value'];
    if (args['programId'] !== undefined) body['programId'] = args['programId'];
    if (args['instructionData'] !== undefined) body['instructionData'] = args['instructionData'];
    if (args['accounts'] !== undefined) body['accounts'] = args['accounts'];
    if (args['network'] !== undefined) body['network'] = args['network'];
    if (args['wallet_id']) body['walletId'] = args['wallet_id'];
    if (args['gas_condition']) {
      const gc = args['gas_condition'] as Record<string, unknown>;
      body['gasCondition'] = { maxGasPrice: gc['max_gas_price'], maxPriorityFee: gc['max_priority_fee'], timeout: gc['timeout'] };
    }
    const result = await client.post('/v1/transactions/send', body);
    return toResult(result);
  },

Tool Definition Quality

A3.7/5.0
Behavior2/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

No annotations provided, so description must fully disclose behavior. It omits that this is a write operation that creates an on-chain transaction, consumes gas, and may fail. Lacks details on side effects, return value, or error handling.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Three sentences efficiently cover purpose, policy requirement, and chain-specific instructions. Front-loaded with core action, no redundant words.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness3/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given 10 parameters, high schema coverage, and no output schema, description adequately covers parameter selection but lacks operational context like side effects, cost implications, or failure modes. Could be more complete.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 100%, so baseline is 3. Description adds limited value beyond schema: clarifies EVM vs Solana usage and auto-resolution for network/wallet_id. Does not elaborate on nested gas_condition parameters or account structure beyond schema.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

Description clearly specifies it calls a whitelisted smart contract, distinguishes EVM and Solana paradigms. Unique verb+resource combination differentiates from siblings like encode_calldata or simulate_transaction.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines4/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

Mentions required CONTRACT_WHITELIST policy and per-chain parameter differences. Does not explicitly state when not to use or list alternatives, but context is clear.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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