deviant/scripts/chipnet-dual-ladder-test.mjs

#!/usr/bin/env node
/**
 * chipnet-dual-ladder-test.mjs — proves the DUAL ladder on chipnet:
 *   rate x10 (in NFT commitment)  AND  fee% x10 (derived: baseFeeBps*price/startPrice).
 * Per buy: total = rate (redeemable backing) + fee (non-recoverable -> treasury).
 * Makes the "total spent per step" column on-chain reality.
 *
 *   vote 1: rate 100,000   fee% 1%    fee 1,000        total 101,000
 *   vote 2: rate 1,000,000 fee% 10%   fee 100,000      total 1,100,000
 *   vote 3: rate 10,000,000 fee% 100% fee 10,000,000   total 20,000,000
 *
 * Voter = A, treasury = C. Writes .chipnet-dual-ladder-test.json.
 * Run: node --import tsx scripts/chipnet-dual-ladder-test.mjs --yes
 */
import { existsSync, readFileSync, writeFileSync } from 'node:fs';
import { join } from 'node:path';
import { TestNetWallet } from 'mainnet-js';
import { Contract, ElectrumNetworkProvider, TransactionBuilder, SignatureTemplate } from 'cashscript';

const ROOT = join(import.meta.dirname, '..');
const STATE_FILE = join(ROOT, 'ChipnetTests', '.chipnet-dual-ladder-test.json');
const ARTIFACT_PATH = join(ROOT, 'contracts/dist/EscalatingDualLadderNFT.json');
const VOTER_KEYS = join(ROOT, '.chipnet-keys.json');      // A (most BCH)
const TREASURY_KEYS = join(ROOT, '.chipnet-keys-c.json'); // C

const START = 100_000n, BASE_FEE_BPS = 100n, SUPPLY = 10n, POSITION_VALUE = 1000n, VOTES = 3;

const hexToBin = (h) => { const o = new Uint8Array(h.length / 2); for (let i = 0; i < o.length; i++) o[i] = parseInt(h.slice(i * 2, i * 2 + 2), 16); return o; };
const binToHex = (b) => Buffer.from(b).toString('hex');
const txidToConsensusBytes = (h) => { const d = hexToBin(h); const o = new Uint8Array(d.length); for (let i = 0; i < d.length; i++) o[i] = d[d.length - 1 - i]; return o; };
const p2pkh = (pkh) => { const o = new Uint8Array(25); o[0] = 0x76; o[1] = 0xa9; o[2] = 0x14; o.set(pkh, 3); o[23] = 0x88; o[24] = 0xac; return o; };
const sleep = (ms) => new Promise((r) => setTimeout(r, ms));
function scriptNum(n) { if (n === 0n) return new Uint8Array([]); let v = n; const o = []; while (v > 0n) { o.push(Number(v & 0xffn)); v >>= 8n; } if (o[o.length - 1] & 0x80) o.push(0x00); return Uint8Array.from(o); }
const priceHex = (n) => binToHex(scriptNum(n));
function decodeNum(hex) { const b = hexToBin(hex); let p = 0n; for (let k = b.length - 1; k >= 0; k--) p = (p << 8n) | BigInt(b[k] & (k === b.length - 1 ? 0x7f : 0xff)); return p; }
const grp = (s) => BigInt(s).toString().replace(/\B(?=(\d{3})+(?!\d))/g, ',');

async function ensureEligibleUtxo(w) {
  let u = await w.getUtxos(); let e = u.filter((x) => x.vout === 0 && !x.token);
  if (e.length) return e[0];
  const bad = u.filter((x) => !(x.vout === 0 && !x.token));
  const r = await w.send([{ cashaddr: w.cashaddr, value: 5000n, unit: 'sat' }], bad.length ? { utxoIds: bad } : undefined);
  console.log(`  splitter ${r?.txId ?? r?.txid}`); await sleep(12_000);
  u = await w.getUtxos(); e = u.filter((x) => x.vout === 0 && !x.token);
  if (!e.length) throw new Error('no eligible vout-0'); return e[0];
}

async function main() {
  if (!process.argv.includes('--yes')) { console.log('Re-run with --yes.'); return; }
  const artifact = JSON.parse(readFileSync(ARTIFACT_PATH, 'utf8'));
  const voter = await TestNetWallet.fromWIF(JSON.parse(readFileSync(VOTER_KEYS, 'utf8')).wif);
  const treasury = await TestNetWallet.fromWIF(JSON.parse(readFileSync(TREASURY_KEYS, 'utf8')).wif);
  const provider = new ElectrumNetworkProvider('chipnet');
  const sig = new SignatureTemplate(voter.privateKey);
  const founderLB = p2pkh(treasury.publicKeyHash);
  const recipientLB = p2pkh(voter.publicKeyHash);
  const ctor = (cat) => [txidToConsensusBytes(cat), founderLB, START, BASE_FEE_BPS];
  const state = existsSync(STATE_FILE) ? JSON.parse(readFileSync(STATE_FILE, 'utf8')) : { votes: [] };

  if (!state.categoryId) {
    const utxo = await ensureEligibleUtxo(voter);
    const cat = utxo.txid;
    const contract = new Contract(artifact, ctor(cat), { provider });
    console.log(`contract ${contract.tokenAddress}\ncategory ${cat}`);
    const r = await voter.tokenGenesis(
      { cashaddr: contract.tokenAddress, amount: SUPPLY, value: POSITION_VALUE,
        nft: { capability: 'mutable', commitment: priceHex(START) } }, [], { utxoIds: [utxo] });
    console.log(`genesis ${r?.txId ?? r?.txid} (commitment ${priceHex(START)} = rate ${grp(START)})`);
    state.categoryId = cat; state.contractTokenAddress = contract.tokenAddress;
    writeFileSync(STATE_FILE, JSON.stringify(state, null, 2)); await sleep(10_000);
  }
  const contract = new Contract(artifact, ctor(state.categoryId), { provider });

  for (let i = state.votes.length; i < VOTES; i++) {
    const ru = await provider.getUtxos(contract.tokenAddress);
    const pos = ru.find((u) => u.token?.nft && u.token?.category === state.categoryId && u.token?.amount > 0n);
    if (!pos) throw new Error('position not found');
    const price = decodeNum(pos.token.nft.commitment);          // rate
    const feeBps = (BASE_FEE_BPS * price) / START;              // mirror the covenant
    const fee = (price * feeBps) / 10000n;
    const total = price + fee;
    console.log(`\nvote #${i + 1}: rate ${grp(price)} · fee% ${Number(feeBps) / 100}% · fee ${grp(fee)} · TOTAL ${grp(total)} sats`);

    const cash = (await provider.getUtxos(voter.cashaddr)).filter((u) => !u.token).sort((a, b) => Number(BigInt(b.satoshis) - BigInt(a.satoshis)));
    const minerFee = 8000n;
    const need = price + fee + minerFee + 1000n;
    const picked = []; let tot = 0n;
    for (const u of cash) { picked.push(u); tot += BigInt(u.satoshis); if (tot >= need) break; }
    if (tot < need) throw new Error(`insufficient BCH ${grp(tot)} < ${grp(need)}`);
    const change = BigInt(pos.satoshis) + tot - POSITION_VALUE - price - fee - minerFee;

    const tb = new TransactionBuilder({ provider });
    tb.addInput(pos, contract.unlock.buy(recipientLB));
    for (const u of picked) tb.addInput(u, sig.unlockP2PKH());
    tb.addOutput({ to: contract.tokenAddress, amount: POSITION_VALUE,
      token: { amount: BigInt(pos.token.amount) - 1n, category: state.categoryId, nft: { capability: 'mutable', commitment: priceHex(price * 10n) } } });
    tb.addOutput({ to: voter.tokenaddr, amount: price, token: { amount: 1n, category: state.categoryId } });
    tb.addOutput({ to: treasury.cashaddr, amount: fee });
    if (change >= 546n) tb.addOutput({ to: voter.cashaddr, amount: change });
    const sent = await tb.send();
    const txid = typeof sent === 'string' ? sent : sent?.txid ?? sent?.txId;
    console.log(`  ✓ paid TOTAL ${grp(total)} (backing ${grp(price)} redeemable + fee ${grp(fee)} → C) · next rate ${grp(price * 10n)} · ${txid}`);
    state.votes.push({ n: i + 1, rate: price.toString(), feeBps: feeBps.toString(), fee: fee.toString(), total: total.toString(), txid });
    writeFileSync(STATE_FILE, JSON.stringify(state, null, 2)); await sleep(10_000);
  }

  let tFee = 0n, tBack = 0n, tTotal = 0n;
  console.log(`\n=== RESULT — dual ladder (rate x10 + fee% x10) ===`);
  for (const v of state.votes) { tFee += BigInt(v.fee); tBack += BigInt(v.rate); tTotal += BigInt(v.total); console.log(`  #${v.n}: rate ${grp(v.rate)} · fee% ${Number(v.feeBps) / 100}% · fee ${grp(v.fee)} · total ${grp(v.total)}`); }
  console.log(`  cumulative TOTAL spent: ${grp(tTotal)} sats  (redeemable backing ${grp(tBack)} + non-recoverable fee ${grp(tFee)} → treasury C)`);
}

main().catch((e) => { console.error('FAILED:', e?.message ?? e); if (e?.stack) console.error(e.stack); process.exit(1); });