Pay gas with work, not ETH.

$ npm i @unlinked/sdk @unlinked/miner viem

import { generatePrivateKey, privateKeyToAccount } from 'viem/accounts'
import { createRelayClient, sendPowUserOperation, startEpochPolling } from '@unlinked/sdk'

const owner = privateKeyToAccount(generatePrivateKey()) // never funded
const relay = createRelayClient(RELAY_URL)
const epochs = startEpochPolling(relay)   // at app start: reads on a fixed schedule
const { receipt } = await sendPowUserOperation({ relay, epochs, owner, call })

// call = claimCall(faucet, token) or transferCall(token, to, amount)

$ npm i @unlinked/miner

import { createMiner, verifySolutions } from '@unlinked/miner'

const miner = createMiner({ threads: 4 })       // one Web Worker per thread
const hashesPerSecond = await miner.calibrate()  // 1.5 s, cached per session

// 8 sorted nonces with keccak256(challenge ‖ nonce) ≤ target
const nonces = await miner.mine({ challenge, targetPerSolution })
verifySolutions(challenge, targetPerSolution, nonces) // same rules as the contract

# Current epoch: work price, fee caps, gas profiles, headroom
curl -s "$UNLINKED_RELAY_URL" -H 'content-type: application/json' \
  -d '{"jsonrpc":"2.0","id":1,"method":"pow_getEpoch","params":[]}'

# Then submit the mined op. The relay re-checks the proof first.
#   eth_sendUserOperation [userOp, ENTRY_POINT_V09]