igneum/site/build.html
igneum-labs cb2b8a2578 Builder programme (8 October 2026): /build, /grants, the Devnet 3 faucet on build-1, docs/build as the source
- site/build.html and site/grants.html rendered by site/build.mjs from docs/build/build.md and docs/build/grants.md (the gate's site-only copy keeps the committed pages, as for /bench); site-relative links in the markdown renderer
- the nav's fourth group, Build (/build, /faucet, /grants), in the partial, the sheet, the footer, the sitemap and tools/ci/site-nav-check.mjs; the faucet leaves the Mine panel
- site/faucet.html is the Devnet 3 faucet: 10 IGN per address per day, 500 a day, chain id 4463, no value, resets without notice; the page posts to https://faucet.igneum.network/api/faucet and shows the balance
- infra/build-server/faucet: faucet.mjs (zero dependencies, signs with site/lib/eth.mjs, limiter self-test known-failed first, 100 IGN cap on the amount), the unit, faucet.sh install/status; live on build-1 behind Caddy since 10:16Z, funded 2,000 IGN by the fleet's funder at 10:01Z; first drip 0x8620e9d8 at 10:17Z
- docs/build: README, first-contract.md with its test script and the PASS line (24 s end to end through the public RPC and faucet, Foundry 1.8.5, Counter deployed at block 27055), rpc.md read from the node (75 methods probed, served and not served), faucet.md, verify-a-block.md, grants.md
- .forgejo/issue_template/grant.md: the grant application template on git.igneum.network

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
2026-10-08 10:24:07 +00:00

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<title>Build on Igneum: chain ids, RPC, a contract in five minutes</title>
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(function(){var t=null;try{t=new URLSearchParams(location.search).get("theme");}catch(e){}if(t!=="light"&&t!=="dark"){try{t=localStorage.getItem("igneum-theme");}catch(e){t=null;}}if(t!=="light"&&t!=="dark")t=window.matchMedia&&window.matchMedia("(prefers-color-scheme: light)").matches?"light":"dark";document.documentElement.setAttribute("data-theme",t);try{if(new URLSearchParams(location.search).get("motion")==="off")document.documentElement.setAttribute("data-motion","off");}catch(e){}})();
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<span class="word">IGNEUM</span>
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<span class="devnet" id="nav-devnet" title="igneum-devnet-3, chain id 4463. Coins have no value. The chain may reset."><span class="dot off" id="foot-dot"></span><span id="foot-state">devnet</span></span>
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<div class="nav-group" role="listitem"><button type="button" class="group-btn" id="nav-btn-mine" data-group="mine" aria-expanded="false" aria-controls="nav-panel-mine" aria-haspopup="true">Mine<svg class="icon" viewBox="0 0 24 24" aria-hidden="true"><path d="m7 10 5 5 5-5"/></svg></button></div>
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<a href="/download" class="btn primary small cta" data-nav="download">Download</a>
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<div class="panel-list">
<a href="/miner" data-nav="miner"><b>Ember, the miner</b><span>One click installs the node, the miner and the prover.</span></a>
<a href="/download" data-nav="download"><b>Download</b><span>Windows, macOS, Linux and HiveOS.</span></a>
<a href="/app" data-nav="app"><b>The app</b><span>What you see while the card mines.</span></a>
<a href="/wallet" data-nav="wallet"><b>The wallet</b><span>Your coins. Final means final.</span></a>
<a href="/miners" data-nav="miners"><b>GPU bench table</b><span>Measured rates, card by card.</span></a>
<a href="/dev-fee" data-nav="dev-fee"><b>The dev fee</b><span>The optional one, in full view, off with one flag.</span></a>
<a href="/metamask" data-nav="metamask"><b>Add to MetaMask</b><span>Igneum as a network in your wallet.</span></a>
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<a href="/live" data-nav="live"><b>Live devnet</b><span>The chain as it grows, one lane per miner.</span></a>
<a href="/explorer" data-nav="explorer"><b>Explorer</b><span>Look a block or an address up.</span></a>
<a href="/journey" data-nav="journey"><b>The journey</b><span>Six phases, four gates, the log behind them.</span></a>
<a href="/bench" data-nav="bench"><b>Engineering log</b><span>Every measurement, with the commands that made it.</span></a>
<a href="/evidence" data-nav="evidence"><b>Evidence</b><span>Every claim and how far it is tested.</span></a>
</div>
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<div class="nav-panel" id="nav-panel-learn" data-group="learn" role="region" aria-labelledby="nav-btn-learn" hidden>
<div class="panel-list">
<a href="/litepaper" data-nav="litepaper"><b>Litepaper</b><span>The design, as published.</span></a>
<a href="/income" data-nav="income"><b>Income per tier</b><span>IGN a day per card at three network sizes, and the electricity.</span></a>
<a href="/ledger" data-nav="ledger"><b>Ledger</b><span>Every criticism, answered or conceded.</span></a>
<a href="/claims" data-nav="claims"><b>What Igneum does not claim</b><span>The limits, stated first.</span></a>
<a href="/randomx" data-nav="randomx"><b>Igneum vs RandomX</b><span>What was kept and what was rebuilt for GPUs.</span></a>
<a href="/provenance" data-nav="provenance"><b>Built on the shoulders</b><span>Every borrowed part, credited.</span></a>
</div>
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<a href="/build" data-nav="build" aria-current="page"><b>Build on Igneum</b><span>Chain ids, RPC, a contract in five minutes.</span></a>
<a href="/faucet" data-nav="faucet"><b>Devnet faucet</b><span>10 IGN of devnet coin, once a day.</span></a>
<a href="/grants" data-nav="grants"><b>Grants</b><span>Tooling, apps, infrastructure, research.</span></a>
</div>
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<div class="sheet-scroll">
<div class="sheet-group"><div class="sheet-head">Mine</div>
<a href="/miner" data-nav="miner"><b>Ember, the miner</b><span>One click installs the node, the miner and the prover.</span></a>
<a href="/download" data-nav="download"><b>Download</b><span>Windows, macOS, Linux and HiveOS.</span></a>
<a href="/app" data-nav="app"><b>The app</b><span>What you see while the card mines.</span></a>
<a href="/wallet" data-nav="wallet"><b>The wallet</b><span>Your coins. Final means final.</span></a>
<a href="/miners" data-nav="miners"><b>GPU bench table</b><span>Measured rates, card by card.</span></a>
<a href="/dev-fee" data-nav="dev-fee"><b>The dev fee</b><span>The optional one, in full view, off with one flag.</span></a>
<a href="/metamask" data-nav="metamask"><b>Add to MetaMask</b><span>Igneum as a network in your wallet.</span></a>
</div>
<div class="sheet-group"><div class="sheet-head">Network</div>
<a href="/live" data-nav="live"><b>Live devnet</b><span>The chain as it grows, one lane per miner.</span></a>
<a href="/explorer" data-nav="explorer"><b>Explorer</b><span>Look a block or an address up.</span></a>
<a href="/journey" data-nav="journey"><b>The journey</b><span>Six phases, four gates, the log behind them.</span></a>
<a href="/bench" data-nav="bench"><b>Engineering log</b><span>Every measurement, with the commands that made it.</span></a>
<a href="/evidence" data-nav="evidence"><b>Evidence</b><span>Every claim and how far it is tested.</span></a>
</div>
<div class="sheet-group"><div class="sheet-head">Learn</div>
<a href="/litepaper" data-nav="litepaper"><b>Litepaper</b><span>The design, as published.</span></a>
<a href="/income" data-nav="income"><b>Income per tier</b><span>IGN a day per card at three network sizes, and the electricity.</span></a>
<a href="/ledger" data-nav="ledger"><b>Ledger</b><span>Every criticism, answered or conceded.</span></a>
<a href="/claims" data-nav="claims"><b>What Igneum does not claim</b><span>The limits, stated first.</span></a>
<a href="/randomx" data-nav="randomx"><b>Igneum vs RandomX</b><span>What was kept and what was rebuilt for GPUs.</span></a>
<a href="/provenance" data-nav="provenance"><b>Built on the shoulders</b><span>Every borrowed part, credited.</span></a>
</div>
<div class="sheet-group"><div class="sheet-head">Build</div>
<a href="/build" data-nav="build" aria-current="page"><b>Build on Igneum</b><span>Chain ids, RPC, a contract in five minutes.</span></a>
<a href="/faucet" data-nav="faucet"><b>Devnet faucet</b><span>10 IGN of devnet coin, once a day.</span></a>
<a href="/grants" data-nav="grants"><b>Grants</b><span>Tooling, apps, infrastructure, research.</span></a>
</div>
<div class="sheet-foot">
<a href="/download" class="btn primary big" data-nav="download">Download</a>
<div class="sheet-social"><a href="https://discord.gg/igneum" target="_blank" rel="noopener">Discord</a><a href="https://git.igneum.network/igneum-network/spec" target="_blank" rel="noopener">Source</a><a href="https://www.reddit.com/user/Igneum_network/" target="_blank" rel="noopener">Reddit</a></div>
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<div class="breadcrumb"><a href="/">Igneum</a><span>/</span><span>Build on Igneum</span></div>
<div class="page-heading"><div><div class="eyebrow"><span class="line"></span>Developers</div>
<h1>Build on Igneum</h1>
<p class="lead">Every block proven. A lock in minutes. Nothing to stake. The EVM you already know: Solidity deploys unchanged. Here are the chain ids, the endpoints and a contract in five minutes.</p></div></div>
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<nav class="doc-nav" aria-label="Contents"><div class="eyebrow">Contents</div><a href="#what-is-different">What is different</a><a href="#networks">Networks</a><a href="#endpoints-and-tools">Endpoints and tools</a><a href="#your-first-contract-in-five-minutes">Your first contract in five minutes</a><a href="#the-rpc-the-node-serves">The RPC the node serves</a><a href="#verify-a-block-in-your-browser">Verify a block in your browser</a><a href="#where-to-ask">Where to ask</a></nav>
<article class="doc-body" data-filter-list="build"><section class="doc-section"><h1 id="build-on-igneum">Build on Igneum</h1>
<p>This file is the source of <a href="https://igneum.network/build" rel="noopener">igneum.network/build</a>. The site build renders it as the page. The other files in this directory are the walkthrough, the RPC list, the faucet, the verifier and the grants.</p>
</section>
<section class="doc-section"><h2 id="what-is-different">What is different</h2>
<p><strong>Every block is proven.</strong> A chain block carries a zero-knowledge proof of its execution. The miners are the provers: the same cards that find blocks prove them, in shards, and the proof follows the tip by tens of seconds. Your contract runs on a chain whose state is proven, not assumed.</p>
<p><strong>A lock in minutes, not an hour of confirmations.</strong> Miners sign a checkpoint every 30 seconds. When two thirds of the mining weight of the last 30 days have signed, the checkpoint is locked. Weight is blocks mined, nothing else. The lock lands in about two minutes. The <a href="/litepaper">litepaper</a> has the rule.</p>
<p><strong>Nothing to stake.</strong> No validator set, no delegation, no slashing, no bonded class above the miners. Finality comes from mining weight alone. Nobody holds a key that the chain depends on.</p>
<p><strong>The EVM you already know.</strong> Solidity deploys unchanged. Standard JSON-RPC, EIP-1559 transactions, the chain id in the signature, <code>cancun</code> as the EVM version. Gas has two dimensions on Igneum, execution and proving, and the node folds the second into the price it quotes, so <code>eth_estimateGas</code> and <code>eth_gasPrice</code> work as they do on Ethereum.</p>
</section>
<section class="doc-section"><h2 id="networks">Networks</h2>
<div class="tbl"><table><thead><tr><th></th><th>Devnet 3</th><th>Testnet</th><th>Mainnet</th></tr></thead><tbody><tr><td>Chain id</td><td>4463 (<code>0x116f</code>)</td><td>4462 (<code>0x116e</code>)</td><td>4461 (<code>0x116d</code>)</td></tr><tr><td>Network id</td><td><code>igneum-devnet-3</code></td><td><code>igneum-testnet-1</code></td><td>not started</td></tr><tr><td>RPC</td><td><code>https://rpc.devnet.igneum.network</code> (a node you run serves <code>http://127.0.0.1:26790</code>)</td><td><code>https://rpc.testnet.igneum.network</code> (answers; nothing mines there yet, so a transaction waits)</td><td>none</td></tr><tr><td>Coins</td><td>no value, resets without notice</td><td>no value, resets with notice</td><td>not started</td></tr><tr><td>Symbol, decimals</td><td>IGN, 18</td><td>IGN, 18</td><td>IGN, 18</td></tr></tbody></table></div>
<p>Devnet 3 is where you build today. It is a developer network: it resets without notice and its coins have no value. Its public RPC takes the read methods, <code>eth_sendRawTransaction</code> and a wRPC websocket at <code>/ws</code>, at 20 requests a second per address. The public testnet exists, its RPC answers, and no blocks are being produced on it until it opens. Mainnet has no date. Devnet 3 answers chain id 4463 until its class v5 floor, then 4464.</p>
</section>
<section class="doc-section"><h2 id="endpoints-and-tools">Endpoints and tools</h2>
<ul><li><strong>Wallet.</strong> Any Ethereum wallet. <a href="/metamask">Add Igneum to MetaMask</a> with one click, or the <a href="/wallet">Igneum wallet</a>.</li><li><strong>Faucet.</strong> <a href="/faucet">10 IGN of Devnet 3 coin</a> per address per day. No account.</li><li><strong>Explorer.</strong> <a href="/explorer">The explorer</a> shows blocks, the DAG, miners and addresses. The EVM views, transactions and contracts, are being built and link from the same page as they land.</li><li><strong>Swap.</strong> A swap on Devnet 3 is being built. This page links it when it serves.</li><li><strong>Source.</strong> <a href="https://git.igneum.network/igneum-network/igneum" rel="noopener">git.igneum.network/igneum-network/igneum</a>: the node, the miner, the site, and these pages under <code>docs/build/</code>.</li></ul>
</section>
<section class="doc-section"><h2 id="your-first-contract-in-five-minutes">Your first contract in five minutes</h2>
<p>With <a href="https://getfoundry.sh" rel="noopener">Foundry</a>. Tested end to end on Devnet 3 on a build box; the full walkthrough with the expected output is <a href="https://git.igneum.network/igneum-network/igneum/src/branch/master/docs/build/first-contract.md" rel="noopener">docs/build/first-contract.md</a>.</p>
<pre>curl -L https://foundry.paradigm.xyz | bash &amp;&amp; foundryup
export RPC=https://rpc.devnet.igneum.network
cast wallet new # an address and a private key, for the devnet only</pre>
<p>Paste the address into <a href="/faucet">the faucet</a>. Then:</p>
<pre>export PK=0x... # the private key cast printed
cast balance $(cast wallet address $PK) --rpc-url $RPC --ether
forge init counter &amp;&amp; cd counter
forge create src/Counter.sol:Counter --rpc-url $RPC --private-key $PK --broadcast</pre>
<p><code>forge create</code> prints <code>Deployed to: 0x...</code>. Call it:</p>
<pre>cast send 0xDEPLOYED "increment()" --rpc-url $RPC --private-key $PK
cast call 0xDEPLOYED "number()(uint256)" --rpc-url $RPC</pre>
<p>The call answers <code>1</code>. Paste the transaction hash into <a href="/explorer">the explorer</a>. Hardhat, ethers and viem work the same way: chain id 4463, the RPC above.</p>
</section>
<section class="doc-section"><h2 id="the-rpc-the-node-serves">The RPC the node serves</h2>
<p>Read from a Devnet 3 node, not from a spec. <code>web3_clientVersion</code> answers <code>igneumd/2.1.0/execution-layer-v3</code>. The full list, served and not served, with the probe that produced it: <a href="https://git.igneum.network/igneum-network/igneum/src/branch/master/docs/build/rpc.md" rel="noopener">docs/build/rpc.md</a>.</p>
<ul><li><strong>Served.</strong> <code>eth_chainId</code>, <code>eth_blockNumber</code>, <code>eth_getBalance</code>, <code>eth_getTransactionCount</code>, <code>eth_getCode</code>, <code>eth_getStorageAt</code>, <code>eth_getBlockByNumber</code>, <code>eth_getBlockByHash</code>, <code>eth_getTransactionByHash</code>, <code>eth_getTransactionReceipt</code>, <code>eth_getBlockReceipts</code>, <code>eth_getLogs</code>, <code>eth_call</code>, <code>eth_estimateGas</code>, <code>eth_gasPrice</code>, <code>eth_maxPriorityFeePerGas</code>, <code>eth_feeHistory</code>, <code>eth_sendRawTransaction</code>, <code>eth_syncing</code>, <code>eth_accounts</code>, <code>net_version</code>, <code>net_peerCount</code>, <code>net_listening</code>, <code>web3_clientVersion</code>.</li><li><strong>Igneum's own.</strong> <code>igneum_getExecStatus</code>, <code>igneum_getProvingStatus</code>, <code>igneum_getShardPlan</code>, <code>igneum_getProofRecords</code>, <code>igneum_getTransactionStatus</code>, <code>igneum_estimateGas</code>, <code>igneum_getBudgets</code> and the segment and proof calls. <code>igneum_estimateGas</code> returns both gas dimensions and whether a call exceeds the proving limit.</li><li><strong>Not served.</strong> Filters and subscriptions (<code>eth_newFilter</code>, <code>eth_subscribe</code>), <code>txpool_*</code>, <code>debug_*</code>, <code>trace_*</code>, <code>eth_sendTransaction</code>, <code>eth_sign</code>, <code>eth_getProof</code>, the uncle calls. Poll <code>eth_blockNumber</code> and <code>eth_getLogs</code>. Sign on your side.</li></ul>
</section>
<section class="doc-section"><h2 id="verify-a-block-in-your-browser">Verify a block in your browser</h2>
<p>The site ships a light client. Your browser fetches the latest certified checkpoint from <code>/api/checkpoint</code> and verifies the BLS aggregate signature, the voter weights and the header chain itself, in the tab. Nothing is trusted from the server but the data. The example, in twelve lines, is <a href="https://git.igneum.network/igneum-network/igneum/src/branch/master/docs/build/verify-a-block.md" rel="noopener">docs/build/verify-a-block.md</a>; the live run is <a href="/verify/test.html">verify/test.html</a>, genuine and tampered cases side by side.</p>
<pre>import { fetchCheckpoint, verify } from 'https://igneum.network/verify/verify.js';
const data = await fetchCheckpoint('https://igneum.network/api/checkpoint');
const r = verify(data);
console.log(r.verified, r.signers, 'of', r.voters, 'voters', r.ms, 'ms');</pre>
</section>
<section class="doc-section"><h2 id="where-to-ask">Where to ask</h2>
<ul><li>An issue on <a href="https://git.igneum.network/igneum-network/igneum/issues" rel="noopener">the repository</a>.</li><li><a href="https://discord.gg/igneum" rel="noopener">Discord</a>, the builders channel.</li><li><a href="/grants">Grants</a> for tooling, reference apps, infrastructure and research.</li></ul>
<p>Devnet and testnet coins have no value. Nothing on this page is an offer to sell anything.</p></section></article>
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<p class="gen">Generated from docs/build/build.md in the repository at build time. Times are UTC.</p>
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bs.forEach(function(b){b.setAttribute('aria-pressed',b.getAttribute('data-theme-set')===stored()?'true':'false');});
// the network state word in the status bar: one read of the observer per page view
var fs=document.getElementById('foot-state'),fd=document.getElementById('foot-dot');if(fs&&fd){fetch('/api/live?window=30',{cache:'no-store'}).then(function(r){return r.json();}).then(function(d){var on=d&&d.ok&&d.state&&!d.state.stale;fs.textContent=on?'devnet live':'devnet, observer stale';fd.className='dot '+(on?'live':'off');}).catch(function(){fs.textContent='devnet';});}
})();
</script>
<!-- footer:end -->
<script src="/ui.js" defer></script>
</body>
</html>