base-gasless-deploy-mcp

Instructions

Implementation Reference

• src/index.ts:274-320 (handler)

  The implementation handler for the estimate_gas_savings tool.

  async ({ token_address }) => {
    try {
      const provider = getProvider();
  
      // Check if we have a deploy record
      const record = deployments.find(
        (d) => d.tokenAddress.toLowerCase() === token_address.toLowerCase()
      );
  
      // Get current gas prices for estimation
      const feeData = await provider.getFeeData();
      const gasPrice = feeData.gasPrice || 0n;
  
      // Typical ERC-20 deploy gas: ~700k-1M gas units
      // Use actual if we have it, otherwise estimate
      const gasUsed = record ? BigInt(record.gasUsed) : 850000n;
      const estimatedCostWei = gasUsed * gasPrice;
      const estimatedCostEth = ethers.formatEther(estimatedCostWei);
  
      // Get ETH price estimate (rough)
      const ethPriceUsd = 2500; // Approximate
  
      const result: Record<string, unknown> = {
        token_address,
        gas_units_used: gasUsed.toString(),
        current_gas_price_gwei: ethers.formatUnits(gasPrice, "gwei"),
        estimated_cost_eth: estimatedCostEth,
        estimated_cost_usd: `$${(parseFloat(estimatedCostEth) * ethPriceUsd).toFixed(4)}`,
        eth_price_estimate_usd: ethPriceUsd,
        paymaster_configured: isPaymasterEnabled(),
      };
  
      if (record) {
        result.actual_gas_used = record.gasUsed;
        result.actual_gas_cost_wei = record.gasCostWei;
        result.actual_gas_cost_eth = ethers.formatEther(BigInt(record.gasCostWei));
        result.used_paymaster = record.usedPaymaster;
        result.gas_saved_eth = record.usedPaymaster
          ? ethers.formatEther(BigInt(record.gasCostWei))
          : "0";
        result.gas_saved_usd = record.usedPaymaster
          ? `$${(parseFloat(ethers.formatEther(BigInt(record.gasCostWei))) * ethPriceUsd).toFixed(4)}`
          : "$0";
        result.status = record.usedPaymaster
          ? "Gas was fully sponsored by paymaster"
          : "Gas was paid by deployer (paymaster not used)";
      } else {

• src/index.ts:268-273 (registration)

  The registration of the estimate_gas_savings tool.

  server.tool(
    "estimate_gas_savings",
    "Show how much gas was saved (or would be saved) by using the paymaster for a token deployment.",
    {
      token_address: z.string().describe("Token contract address to check gas savings for"),
    },