MCP Ethers Wallet

Implementation Reference

• src/tools/core.ts:731-783 (handler)

  The complete implementation of the 'resolveName' tool, including registration via server.tool, input schema using Zod, and the async handler function that resolves an ENS name to an Ethereum address using ethers.js provider.

  // ENS resolveName tool
  server.tool(
    "resolveName",
    {
      name: z.string().describe(
        "The ENS name to resolve"
      ),
      provider: z.string().optional().describe(PROVIDER_DESCRIPTION),
      chainId: z.number().optional().describe(
        "Optional. The chain ID to use. If provided with a named network and they don't match, the RPC's chain ID will be used."
      )
    },
    async ({ name, provider, chainId }) => {
      try {
        const ethProvider = await ethersService.getProvider(provider, chainId);
        
        // Resolve the ENS name to an address
        const address = await ethProvider.resolveName(name);
        
        if (!address) {
          return {
            content: [{ 
              type: "text", 
              text: JSON.stringify({
                name,
                resolved: false,
                message: "Name could not be resolved"
              }, null, 2)
            }]
          };
        }
        
        return {
          content: [{ 
            type: "text", 
            text: JSON.stringify({
              name,
              address,
              resolved: true
            }, null, 2)
          }]
        };
      } catch (error) {
        return {
          isError: true,
          content: [{ 
            type: "text", 
            text: `Error resolving ENS name: ${error instanceof Error ? error.message : String(error)}`
          }]
        };
      }
    }
  );