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dylanlottdylanlott
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feat: add Gouda testnet support (#13)
## Summary - Adds \`chains/Gouda.sol\` with rollup chain ID 792669, deployed Passage/Orders addresses on the Gouda host (`0x57348c54e3F89097579dFcD4F5d2700ca2EB1906` / `0x5C5cd1F1c35227b14F6A94c6e05347403F4C963E`), and Gouda host token addresses. \`HOST_CHAIN_ID\` matches Parmigiana's (3151908) — Gouda runs on the Parmigiana host chain. - Adds a Gouda \`else if\` branch in \`SignetL2\`'s constructor, mirroring the existing Parmigiana pattern, so contracts inheriting \`Flash\`/\`PayMe\`/etc compile and deploy on Gouda. ## Test plan - [x] \`forge build\` clean - [x] \`FlashProbe\` (from signet-e2e/contracts) deploys to Gouda RU at \`0x28436307Eb88e4b571EbD866435dFC634CD345C9\` against this branch — previously reverted with \`UnsupportedChain(792669)\`. ## Related - init4tech/signet-sdk#236 (adds \`signet_constants::gouda\`) - init4tech/node-components#144 (adds gouda.genesis.json) - init4tech/bin-base#149 (KnownChains::Gouda) 🤖 Generated with [Claude Code](https://claude.com/claude-code)
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‎src/chains/Gouda.sol‎

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// SPDX-License-Identifier: UNLICENSED
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pragma solidity ^0.8.13;
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import {HostOrders} from "zenith/src/orders/HostOrders.sol";
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import {Passage} from "zenith/src/passage/Passage.sol";
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/// @title GoudaConstants
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/// @author init4
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/// @notice Constants for the Gouda testnet.
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/// @dev Gouda runs on the Parmigiana host chain, so HOST_CHAIN_ID matches
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/// Parmigiana's. Rollup chain ID and on-host contract deployments are
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/// gouda-specific. Used by `SignetL2` when block.chainid == ROLLUP_CHAIN_ID.
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library GoudaConstants {
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/// @notice The Gouda host chain ID (shared with Parmigiana).
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uint32 constant HOST_CHAIN_ID = 3151908;
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/// @notice The Gouda Rollup chain ID.
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uint32 constant ROLLUP_CHAIN_ID = 792669;
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/// @notice The Passage contract for the Gouda host chain.
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Passage constant HOST_PASSAGE = Passage(payable(0x57348c54e3F89097579dFcD4F5d2700ca2EB1906));
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/// @notice The HostOrders contract for the Gouda host chain.
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HostOrders constant HOST_ORDERS = HostOrders(0x5C5cd1F1c35227b14F6A94c6e05347403F4C963E);
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/// USDC token for the Gouda host chain.
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address constant HOST_USDC = 0x6A27cc6968b1d08cd04a656075cc25905156827E;
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/// USDT token for the Gouda host chain.
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address constant HOST_USDT = 0x3Aad2B8D721bB2F7F79356515D15AAd3F8d6a32d;
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/// WBTC token for the Gouda host chain.
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address constant HOST_WBTC = 0x260fDcb6e6e2c1C5f96647ee0FaE34E7E92e6f28;
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/// WETH token for the Gouda host chain.
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address constant HOST_WETH = 0xD1278f17e86071f1E658B656084c65b7FD3c90eF;
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}

‎src/l2/Signet.sol‎

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import {RollupOrders} from "zenith/src/orders/RollupOrders.sol";
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import {RollupConstants} from "../chains/L2.sol";
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import {GoudaConstants} from "../chains/Gouda.sol";
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import {ParmigianaConstants} from "../chains/Parmigiana.sol";
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import {AddressAliasHelper} from "../vendor/AddressAliasHelper.sol";
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HOST_USDT = ParmigianaConstants.HOST_USDT;
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HOST_WBTC = ParmigianaConstants.HOST_WBTC;
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HOST_WETH = ParmigianaConstants.HOST_WETH;
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} else if (block.chainid == GoudaConstants.ROLLUP_CHAIN_ID) {
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HOST_CHAIN_ID = GoudaConstants.HOST_CHAIN_ID;
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HOST_PASSAGE = address(GoudaConstants.HOST_PASSAGE);
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HOST_USDC = GoudaConstants.HOST_USDC;
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HOST_USDT = GoudaConstants.HOST_USDT;
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HOST_WBTC = GoudaConstants.HOST_WBTC;
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HOST_WETH = GoudaConstants.HOST_WETH;
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} else {
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revert UnsupportedChain(block.chainid);
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}

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