# Igneum public testnet: identity, parameters and reset policy (ADOPTED 5 October 2026)

Every value in this file was proposed on the night of 4 October 2026 and ADOPTED by the owner on 5 October 2026,
as proposed (sign-off recorded in `docs/plans/release-0.3.6.md`). The genesis below is the one the proposal
computed; its values did not change at the sign-off, so the hash stands. The code was written on the node fork's
branch `testnet-params` (worktree `vendor/igneum-node-testnet`, forked from `finality-fixes` at `6aa69a45`) and
merged on 5 October 2026 into the fork's `release-0.3.6` (worktree `vendor/igneum-node-036`), with one change the
sign-off added: the devnet and the simnet keep the prototype fee set until a height switch
(`fees_v1_activation_daa`) or a `fees` object in the override file moves them; the testnet and the mainnet carry
calibrated v1 from genesis (section 3). The devnet's switch is DAA score 210,000 (5 October 2026,
`docs/plans/fee-switch-devnet.md`). The three seed nodes went up on 5 October 2026 from the final genesis below (`docs/plans/testnet-go.md`); nothing mines until the owner's go.

## 1. Identity

| Field | Devnet (live today) | Testnet (adopted) | Where |
|---|---|---|---|
| Network id (handshake string, data directory) | `igneum-devnet` | `igneum-testnet-1` | `consensus/core/src/network.rs`, `NetworkId::to_prefixed` |
| Network type and suffix | Devnet, none | Testnet, suffix 1 | `config/params.rs`, `From<NetworkId>`: only suffix 1 resolves; any other suffix is refused |
| EVM chain id | 4463 | 4462 | `consensus/core/src/evm.rs`, `evm_chain_id` (mainnet 4461) |
| Address prefix | `igneumdev` | `igneumtest` | `crypto/addresses` |
| gRPC port | 26610 | 26810 | `network.rs`, `default_rpc_port` |
| P2P port | 26611 | 26811 | `network.rs`, `default_p2p_port` (a later suffix takes the next port) |
| wRPC Borsh, JSON | 27610, 28610 | 27810, 28810 | `network.rs` |
| EVM JSON-RPC port | 26790 | 26890 | `igneum/exec/src/config.rs`, `default_evm_rpc_port` |
| DNS seeders | none | `seed1.testnet.igneum.network`, `seed2.testnet.igneum.network`, `seed3.testnet.igneum.network` (A records on deSEC, `infra/seed-nodes/dns.sh`; Nuremberg, Ashburn, Singapore) | `TESTNET_PARAMS.dns_seeders` |
| Override file (`--override-params-file`) | allowed | refused, as on mainnet | `kaspad/src/daemon.rs` |
| `IGNEUM_POW_*` environment | ignored by the node from this branch (G12: the params' schedule is installed on every start) | ignored | `kaspad/src/daemon.rs` |

Start a node on it: `igneumd --testnet` (the flag `--testnet` is "Use the Igneum test network"; `--netsuffix`
defaults to 1 in `kaspad/src/args.rs` since 5 October 2026, so `--netsuffix=1` is implied). The public JSON-RPC is
`https://rpc.testnet.igneum.network` (seed1, nginx with TLS and a rate limit, an allowlist of `eth_*` and `igneum_*`
read methods plus `eth_sendRawTransaction`; `infra/seed-nodes/rpc/`).

## 2. Genesis

| Field | Value | Note |
|---|---|---|
| Timestamp | 1,791,158,400,000 ms = 2026-10-05T00:00:00Z (`0x1a1095c3400`) | frozen; adopted 5 October 2026 |
| Bits | `0x1d100000` (2^28 expected hashes per block) | the devnet's launch difficulty, sized for a few hundred MH/s; the DAA takes over after 150 samples (600 blocks); re-size to the announced launch fleet |
| Nonce, DAA score | 0, 0 | |
| UTXO commitment | empty | |
| Coinbase payload message | `igneum-testnet-1 \| 2026-10-05 \| coins here have no value \| resets are announced` | after the OP-FALSE script, as the devnet's `igneum-devnet`. FINAL 5 October 2026 (fork branch `testnet-infra`, 1c19441d): the proposal's "proposed, not final" was dropped before the first public node started, as `docs/plans/release-0.3.6.md` section 6 required. The message never changes again on `igneum-testnet-1` |
| Hash | `87617621714af1bf33bd17f291f90a7e0bff760a669bba53083ea8c0f7cbd840` | computed 5 October 2026 by `print_genesis_hashes` (two runs: the merkle root first, then the header hash over it), pinned by `test_genesis_hashes` and `igneum_testnet_identity`; the three seeds started from it at height 0 the same day. The proposal's hash `52a3e6a9...` is void |
| Merkle root | `44acfc40b1c6647011510f3c39ddb7606f979df92ad26a2914de56e44610efad` | same |

## 3. Consensus parameters

| Parameter | Testnet (adopted) | Devnet today | Why |
|---|---|---|---|
| Block rate | 1 per second | 1 per second | spec 02 |
| Difficulty rule | Igneum dual-lane, v2 from genesis | dual-lane, v2 from DAA 33,000 | a fresh chain has no pre-switch history |
| Finality parameters | `FinalityParams::MAINNET`: 30-day weight window (2,592,000 DAA), dust 100, presence 240, 8 aggregators, 30-day equivocation ban, min DAA 2,592,000, certificate fold 6 | `DEVNET`: 2-hour window, dust 5, presence 20, fold 3 | the testnet runs the rule the mainnet will run; the first lock needs 30 days of weight, which is the point of a testnet |
| Finality rule v3 | from genesis | from the override file | fresh chain |
| Proving v0 payouts | from genesis | from the override file | fresh chain |
| PoW schedule | epoch 3,600 DAA, lead 600, day 86,400,000 ms (the defaults) | same | |
| Coinbase payload limit | 16,384 (the finality section) | same | |
| Fees | `FeeParams::CALIBRATED_V1` from genesis (`fees_v1_activation_daa` 0; `docs/analysis/base-fee-floor.md`): `B_p` 120,000 pgas, `S_p` 30,000, intrinsic 300, modexp 10 + 1 per 10 bytes, floors 100 gwei per gas and 10,000 gwei per pgas | `FeeParams::PROTOTYPE` (`B_p` 30 M, 1 gwei), kept on the 0.3.6 node so the live chain does not change rules between builds; moves to v1 by the `fees_v1_activation_daa` height switch in the override file (`docs/plans/release-0.3.6.md`, section 5) | spec 05 section 5.10 |
| Emission | the mainnet schedule: 31.69 IGN per block in year one, halving every two years, cap 4 billion | same | the testnet coins have no value whatever the schedule says |

Everything else (mass limits, GHOSTDAG k, merge depth, pruning) is the devnet's set, unchanged.

## 4. Reset policy

| Rule | Adopted 5 October 2026 |
|---|---|
| Coins | Testnet IGN has no value, cannot be bought, sold or redeemed, and is not a claim on anything at mainnet. Mainnet starts from an empty genesis. No airdrop, no points, no promise tied to a testnet balance |
| When the chain resets | When a consensus rule changes (the lottery hash, the difficulty rule, finality, the fee table, the execution rules) and a height switch is not the right tool; or when the chain is broken beyond a height switch |
| Notice | At least N = 7 days ahead, on igneum.network (the download page and the live page), in the app through the update manifest's note, and in the engineering log. A reset without notice is a bug report, not a policy |
| What carries over | Nothing. Balances, contracts, nonces and history start again. Addresses stay valid (an address is a key) |
| Identity after a reset | A consensus-changing reset takes the next suffix (`igneum-testnet-2`, chain id unchanged at 4462, P2P port 26812), so a node on the old rules never completes a handshake with the new chain |
| The devnet | Keeps resetting without notice; it is a developer network. Its chain id 4463 stays separate |
| Who decides | The project, by the sign-off that this file records; the parameters the genesis rules leave to miners (`B_p`, the floors) move by 60% signalling once the testnet has miners (spec 5.5) |

## 5. What stands between this file and a public testnet

| Item | State |
|---|---|
| Sign-off of every value above | done: adopted by the owner on 5 October 2026, as proposed |
| `--netsuffix` default 1 under `--testnet` | done 5 October 2026 (fork `testnet-infra` 1c19441d) |
| Seed nodes and the DNS seeder list | done 5 October 2026: three Hetzner seeds (`infra/seed-nodes/seeds-testnet.tsv`), the three names in `TESTNET_PARAMS.dns_seeders`; `docs/plans/testnet-go.md` |
| The public RPC and explorer | the RPC is `https://rpc.testnet.igneum.network` (5 October 2026); the explorer is not built |
| The prover's table mirror and fixtures | `docs/analysis/base-fee-floor.md` section 4 |
| The app's testnet build | branch `testnet-app` (5 October 2026): the packaged file's `network`, `peers`, `public_rpc`; the testnet's ports, seeds and node directory in `app/igneum-app/src/config.rs`; the release engineer cuts 0.4.0 from it at go |
| The params digest in the handshake (X18) | separate work, before the testnet |
| Terms on the download page | `site/index.html#testnet-terms`, on branch `testnet-prep` with this file |