Blocknative API shutting down June 19, 2026 — drop-in replacement available #327

Hi @7finney,

I noticed this repo uses Blocknative (found in src/utils/functions.ts) — heads up that Blocknative was acquired by Deloitte and their gas estimation API is shutting down on June 19, 2026 (less than 4 weeks away).

I built LogicNodes as a direct drop-in replacement, live today.

Migration is 2 lines:

// Before (Blocknative — shutting down June 19)
const res = await fetch('https://api.blocknative.com/gasprices/blockprices', {
  headers: { 'Authorization': BN_API_KEY }
});

// After (LogicNodes — live now, same fields)
const res = await fetch('https://logicnodes.io/call/eip1559_gas_estimator', {
  method: 'POST',
  headers: { 'Content-Type': 'application/json', 'X-API-Key': LN_API_KEY },
  body: JSON.stringify({ chain: 'base', speed: 'fast' })
});
// result.result.max_fee_gwei, result.result.priority_fee_gwei

What you get:

• Base, Ethereum, Arbitrum, Optimism — real eth_feeHistory 100-block analysis
• Pay-per-call via USDC on Base ($0.001/call, no key needed) or monthly from $9
• Cryptographically signed responses (EIP-191)
• Free trial: POST https://logicnodes.io/free-trial/eip1559_gas_estimator

Full migration guide + live demo: https://logicnodes.io/blocknative

Happy to help with any migration questions — just reply here.

— Conner @ LogicNodes (DENNEYTRADINGCO LLC, AZ)