diff --git a/docs/build/build.md b/docs/build/build.md
index 585b290ea..44e65413d 100644
--- a/docs/build/build.md
+++ b/docs/build/build.md
@@ -16,13 +16,13 @@ This file is the source of [igneum.network/build](https://igneum.network/build).
| | Devnet 3 | Testnet | Mainnet |
|---|---|---|---|
-| Chain id | 4463 (`0x116f`) | 4462 (`0x116e`) | 4461 (`0x116d`) |
+| Chain id | 4464 (`0x1170`; 4463 before the class v5 floor of 8 October 2026) | 4462 (`0x116e`) | 4461 (`0x116d`) |
| Network id | `igneum-devnet-3` | `igneum-testnet-1` | not started |
| RPC | `https://rpc.devnet.igneum.network` (a node you run serves `http://127.0.0.1:26790`) | `https://rpc.testnet.igneum.network` (answers; nothing mines there yet, so a transaction waits) | none |
| Coins | no value, resets without notice | no value, resets with notice | not started |
| Symbol, decimals | IGN, 18 | IGN, 18 | IGN, 18 |
-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, `eth_sendRawTransaction` and a wRPC websocket at `/ws`, 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.
+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, `eth_sendRawTransaction` and a wRPC websocket at `/ws`, 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 4464 since its class v5 floor crossed at DAA 68,400 on 8 October 2026 (4463 before it); `eth_chainId` on the RPC is the answer to trust.
## Endpoints and tools
@@ -58,7 +58,7 @@ cast send 0xDEPLOYED "increment()" --rpc-url $RPC --private-key $PK
cast call 0xDEPLOYED "number()(uint256)" --rpc-url $RPC
```
-The call answers `1`. Paste the transaction hash into [the explorer](/explorer). Hardhat, ethers and viem work the same way: chain id 4463, the RPC above.
+The call answers `1`. Paste the transaction hash into [the explorer](/explorer). Hardhat, ethers and viem work the same way: chain id 4464, the RPC above.
## The RPC the node serves
diff --git a/docs/build/first-contract.md b/docs/build/first-contract.md
index 66322567c..bc2668503 100644
--- a/docs/build/first-contract.md
+++ b/docs/build/first-contract.md
@@ -1,6 +1,6 @@
# Your first contract on Devnet 3, in five minutes
-With Foundry. Tested end to end on Devnet 3 from a build box on 8 October 2026; the pass line and the exact output are at the end. Hardhat, ethers and viem work the same way: chain id 4463 and the RPC below.
+With Foundry. Tested end to end on Devnet 3 from a build box on 8 October 2026; the pass line and the exact output are at the end. Hardhat, ethers and viem work the same way: chain id 4464 (4463 before the class v5 floor of 8 October 2026) and the RPC below.
## 0. What you need
@@ -10,7 +10,7 @@ With Foundry. Tested end to end on Devnet 3 from a build box on 8 October 2026;
```
export RPC=https://rpc.devnet.igneum.network
-cast chain-id --rpc-url $RPC # 4463
+cast chain-id --rpc-url $RPC # 4464 since the class v5 floor of 8 October 2026 (the PASS line below ran at 4463, before it)
```
## 1. A key, for the devnet only
diff --git a/site/404.html b/site/404.html
index 09178008e..30ca164c5 100644
--- a/site/404.html
+++ b/site/404.html
@@ -55,7 +55,7 @@ main{flex:1}
IGNEUM
- devnet
+ devnet
The EVM you already know. Solidity deploys unchanged. Standard JSON-RPC, EIP-1559 transactions, the chain id in the signature, cancun 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 eth_estimateGas and eth_gasPrice work as they do on Ethereum.
Networks
-
Devnet 3
Testnet
Mainnet
Chain id
4463 (0x116f)
4462 (0x116e)
4461 (0x116d)
Network id
igneum-devnet-3
igneum-testnet-1
not started
RPC
https://rpc.devnet.igneum.network (a node you run serves http://127.0.0.1:26790)
https://rpc.testnet.igneum.network (answers; nothing mines there yet, so a transaction waits)
none
Coins
no value, resets without notice
no value, resets with notice
not started
Symbol, decimals
IGN, 18
IGN, 18
IGN, 18
-
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, eth_sendRawTransaction and a wRPC websocket at /ws, 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.
+
Devnet 3
Testnet
Mainnet
Chain id
4464 (0x1170; 4463 before the class v5 floor of 8 October 2026)
4462 (0x116e)
4461 (0x116d)
Network id
igneum-devnet-3
igneum-testnet-1
not started
RPC
https://rpc.devnet.igneum.network (a node you run serves http://127.0.0.1:26790)
https://rpc.testnet.igneum.network (answers; nothing mines there yet, so a transaction waits)
none
Coins
no value, resets without notice
no value, resets with notice
not started
Symbol, decimals
IGN, 18
IGN, 18
IGN, 18
+
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, eth_sendRawTransaction and a wRPC websocket at /ws, 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 4464 since its class v5 floor crossed at DAA 68,400 on 8 October 2026 (4463 before it); eth_chainId on the RPC is the answer to trust.
Explorer.The explorer 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.
Swap.The swap: test tokens on Devnet 3, every swap in a proven block.
The call answers 1. Paste the transaction hash into the explorer. Hardhat, ethers and viem work the same way: chain id 4463, the RPC above.
+
The call answers 1. Paste the transaction hash into the explorer. Hardhat, ethers and viem work the same way: chain id 4464, the RPC above.
The RPC the node serves
Read from a Devnet 3 node, not from a spec. web3_clientVersion answers igneumd/2.1.0/execution-layer-v3. The full list, served and not served, with the probe that produced it: docs/build/rpc.md.
Paste an address. The faucet sends 10 IGN of Devnet 3 coin and shows you the transaction hash. Once per address per day, once per connection per day. No account, no sign-in, nothing to install.
-
Devnet 3, chain id 4463. The coins have no value and the chain resets without notice.
+
Devnet 3, chain id 4464 (4463 before its class v5 floor on 8 October 2026). The coins have no value and the chain resets without notice.
What is storedThe address, the connection's IP, the transaction hash and the time, on the box that runs the faucet, for 24 hours of rate limiting. Nothing else.
-
Chain id
4463 (Devnet 3)
+
Chain id
4464 (Devnet 3, since its class v5 floor on 8 October 2026)
The Igneum Miner app runs a full node on your machine and serves the Ethereum RPC on it. Point the wallet at that node. The devnet is a developer network: it resets without notice and its coins have no value.
+
Igneum Devnet 3, through the public RPC or your own node
+
The public RPC answers at rpc.devnet.igneum.network; the Igneum Miner app also runs a full node on your machine and serves the Ethereum RPC on it, and the wallet can point at either. The devnet is a developer network: it resets without notice and its coins have no value.
-
Network name
Igneum Devnet (local node)
-
Chain id
4463 (0x116f) on Devnet 3; 4464 (0x1170) after its class v5 floor
-
RPC URL
http://127.0.0.1:26790
+
Network name
Igneum Devnet 3
+
Chain id
4464 (0x1170) on Devnet 3, since its class v5 floor at DAA 68,400 on 8 October 2026 (4463 before it)
+
RPC URL
https://rpc.devnet.igneum.network (a node you run serves http://127.0.0.1:26790)
The Igneum Ember app (still labelled Igneum Miner in its window) makes an address for your earnings and shows you its seed phrase once. That address is an ordinary Ethereum account: import the seed into MetaMask and the balance is there. Igneum Wallet 0.1.5 is out for macOS and verifies finality itself; its Apps tab is in the roadmap. MetaMask works today and is the way in on Windows and Linux.
-
Testnet coin for testing: the faucet sends 10 IGN per address per day. Chain ids 4461 (mainnet), 4462 (testnet) and 4463 (devnet) are fixed in the node; Devnet 3 answers 4463 until its class v5 floor, then 4464. The testnet RPC URL above is a placeholder until the testnet opens; this page is updated the day it does.
+
Testnet coin for testing: the faucet sends 10 IGN per address per day. Chain ids 4461 (mainnet) and 4462 (testnet) are fixed in the node; Devnet 3 answers 4464 since its class v5 floor crossed at DAA 68,400 on 8 October 2026 (4463 before it), and eth_chainId on the public RPC is the answer to trust. The testnet RPC URL above is a placeholder until the testnet opens; this page is updated the day it does.