worldcup-linelock

worldcup-linelock

Teach any harness (Claude Code / Cursor / Codex) to be a buyer on LineLock: a pay-per-pick World Cup edge API on Injective EVM where the x402 USDC receipt IS the pick's pre-kickoff timestamp, plus a free public ledger that CLV-scores every settled pick (losses included).

Install:

npx skills add https://github.com/edycutjong/linelock --skill worldcup-linelock

Config: set LINELOCK_API (default https://linelock.edycu.dev) and, to pay, OPS_WALLET_PK (a funded Injective EVM key holding USDC).

When to use

• "Get me the next World Cup knockout edge / pick."
• "Is this tipster real? Check their CLV." → read the free ledger, no payment.
• "Pay for the edge and prove the receipt predates kickoff."

The flow (4 steps)

1. Check USDC balance (Injective MCP server — free, no payment)

Use the Injective MCP server (InjectiveLabs/mcp-server, stdio, INJECTIVE_NETWORK=mainnet):

• account_balances { address } → confirm ≥ 0.05 USDC on Injective.
• usdc_native_info → the USDC contract address + decimals used by the quote (do not hardcode from docs; pin from here).
• If low, fund via CCTP: cctp_supported_chains → burn on Base (domain 6) → cctp_attestation_status → cctp_mint on Injective. address_normalize converts inj1… ↔ 0x… for display.

2. Pay the x402 quote (first-party client — never hand-roll signing)

POST {LINELOCK_API}/api/edge         # no payment header → HTTP 402 + quote

The 402 body (and the PAYMENT-REQUIRED base64 header) is an x402 v2 PaymentRequired: accepts[0] = { network: "eip155:1776", asset: <USDC>, amount: "50000", payTo, scheme: "exact" }. Pay with the shipped client:

import { createInjectiveClient, parsePaymentResponseHeader } from '@injectivelabs/x402/client';
const client = createInjectiveClient({ privateKey: process.env.OPS_WALLET_PK,
  preferredNetworks: ['eip155:1776'], defaultToken: 'USDC' });
const res = await client.fetch(`${API}/api/edge`, { method: 'POST' }); // auto-handles the 402
const receipt = parsePaymentResponseHeader(res); // { success, transaction, network, payer }

receipt.transaction is the on-chain tx — its block time is your pre-kickoff proof (verify on Blockscout: https://blockscout.injective.network/tx/<tx>). The repo's scripts/buyer.ts implements exactly this (run npm run buyer for the free 402-parse path, -- --pay to pay).