@unruggable/gateways
Version:
Trustless Ethereum Multichain CCIP-Read Gateway
201 lines (200 loc) • 8.63 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.EuclidRollup = void 0;
const rollup_js_1 = require("../rollup.cjs");
const contract_1 = require("ethers/contract");
const abi_1 = require("ethers/abi");
const crypto_1 = require("ethers/crypto");
const utils_1 = require("ethers/utils");
const chains_js_1 = require("../chains.cjs");
const EthProver_js_1 = require("../eth/EthProver.cjs");
const utils_js_1 = require("../utils.cjs");
const cached_js_1 = require("../cached.cjs");
const beacon_js_1 = require("../beacon.cjs");
const fzstd_1 = require("fzstd");
// https://github.com/scroll-tech/go-ethereum/tree/24757865c6bbd9becb0256e97e8492d1f73987d9
// https://github.com/scroll-tech/scroll-contracts/blob/8e6a02b120d3a997f7c8e948b62bfb0e5b3ac185/src/L1/rollup/IScrollChain.sol
const ROLLUP_ABI = new abi_1.Interface([
`function lastFinalizedBatchIndex() view returns (uint256)`,
`function finalizedStateRoots(uint256 batchIndex) view returns (bytes32)`,
`event CommitBatch(
uint256 indexed batchIndex,
bytes32 indexed batchHash
)`,
`event FinalizeBatch(
uint256 indexed batchIndex,
bytes32 indexed batchHash,
bytes32 stateRoot,
bytes32 withdrawRoot
)`,
`function commitBatches(
uint8 version,
bytes32 parentBatchHash,
bytes32 lastBatchHash,
)`,
`function commitAndFinalizeBatch(
uint8 version,
bytes32 parentBatchHash,
(
bytes batchHeader,
uint256 totalL1MessagesPoppedOverall,
bytes32 postStateRoot,
bytes32 withdrawRoot,
bytes zkProof
) finalizeStruct
)`,
]);
const BATCH_VERSION = 7;
class EuclidRollup extends rollup_js_1.AbstractRollup {
beaconAPI;
// https://etherscan.io/address/0xa13BAF47339d63B743e7Da8741db5456DAc1E556
static mainnetConfig = {
chain1: chains_js_1.CHAINS.MAINNET,
chain2: chains_js_1.CHAINS.SCROLL,
ScrollChain: '0xa13BAF47339d63B743e7Da8741db5456DAc1E556',
};
// https://sepolia.etherscan.io/address/0x2D567EcE699Eabe5afCd141eDB7A4f2D0D6ce8a0
static sepoliaConfig = {
chain1: chains_js_1.CHAINS.SEPOLIA,
chain2: chains_js_1.CHAINS.SCROLL_SEPOLIA,
ScrollChain: '0x2D567EcE699Eabe5afCd141eDB7A4f2D0D6ce8a0',
};
ScrollChain;
beaconConfig = new cached_js_1.CachedValue(async () => {
const [genesis, spec] = await Promise.all([
`${this.beaconAPI}/eth/v1/beacon/genesis`,
`${this.beaconAPI}/eth/v1/config/spec`,
].map(beacon_js_1.fetchBeaconData));
return {
genesisTime: BigInt(genesis.genesis_time),
secondsPerSlot: BigInt(spec.SECONDS_PER_SLOT),
};
}, Infinity);
constructor(providers, config, beaconAPI) {
super(providers);
this.beaconAPI = beaconAPI;
this.ScrollChain = new contract_1.Contract(config.ScrollChain, ROLLUP_ABI, this.provider1);
}
async fetchLatestCommitIndex() {
return this.ScrollChain.lastFinalizedBatchIndex({
blockTag: this.latestBlockTag,
});
}
async _fetchParentCommitIndex(commit) {
return this.ScrollChain.lastFinalizedBatchIndex({
blockTag: commit.l1BlockNumber - 1,
});
}
async _fetchCommit(index) {
// const [commitEvent] = await this.ScrollChain.queryFilter(
// this.ScrollChain.filters.CommitBatch(index)
// );
// const [finalEvent] = await this.ScrollChain.queryFilter(
// this.ScrollChain.filters.FinalizeBatch(index)
// );
const [[commitEvent], [finalEvent]] = await Promise.all([
this.ScrollChain.queryFilter(this.ScrollChain.filters.CommitBatch(index)),
this.ScrollChain.queryFilter(this.ScrollChain.filters.FinalizeBatch(index)),
]);
if (!commitEvent)
throw new Error(`unknown batch`);
if (!(finalEvent instanceof contract_1.EventLog))
throw new Error('not finalized');
const tx = await commitEvent.getTransaction();
const desc = this.ScrollChain.interface.parseTransaction(tx);
if (!desc)
throw new Error(`expected commit tx: ${tx.hash}`);
switch (desc.name) {
case 'commitBatches':
case 'commitAndFinalizeBatch':
break;
default:
throw new Error(`unsupported commit tx: ${desc.name}`);
}
if (desc.args.version != BATCH_VERSION) {
throw new Error(`unexpected version: ${desc.args.version}`);
}
if (!tx.blobVersionedHashes || !tx.blobVersionedHashes.length) {
throw new Error(`expected blobs`);
}
const [config, block] = await Promise.all([
this.beaconConfig.get(),
(0, utils_js_1.fetchBlock)(this.provider1, tx.blockNumber),
]);
const sidecars = await (0, beacon_js_1.fetchSidecars)(this.beaconAPI, (BigInt(block.timestamp) - config.genesisTime) / config.secondsPerSlot);
let batchIndex = finalEvent.args.batchIndex - BigInt(tx.blobVersionedHashes.length - 1);
let batchHash = desc.args.parentBatchHash;
let sidecar;
for (const bvh of tx.blobVersionedHashes) {
sidecar = sidecars[bvh];
if (!sidecar)
throw new Error(`expected sidecar: ${bvh}`);
// https://github.com/scroll-tech/da-codec/blob/344f2d5e33e1930c63cd6a082ef77e27dbe50cea/encoding/codecv7.go#L168
// https://github.com/scroll-tech/da-codec/blob/344f2d5e33e1930c63cd6a082ef77e27dbe50cea/encoding/codecv7_types.go#L125
batchHash = (0, crypto_1.keccak256)((0, utils_1.concat)([
(0, utils_js_1.toPaddedHex)(BATCH_VERSION, 1),
(0, utils_js_1.toPaddedHex)(batchIndex++, 8),
bvh,
batchHash,
]));
}
if (batchHash !== finalEvent.args.batchHash) {
//desc.args.lastBatchHash) {
throw new Error(`invalid batchHash chain: ${batchHash}`);
}
const prover = new EthProver_js_1.EthProver(this.provider2, lastBlockFromBlobV7(sidecar.blob));
return { index, prover, l1BlockNumber: finalEvent.blockNumber };
}
encodeWitness(commit, proofSeq) {
return utils_js_1.ABI_CODER.encode(['(uint256, bytes[], bytes)'], [[commit.index, proofSeq.proofs, proofSeq.order]]);
}
windowFromSec(sec) {
// finalization time is not on-chain
// https://etherscan.io/advanced-filter?eladd=0xa13baf47339d63b743e7da8741db5456dac1e556&eltpc=0x26ba82f907317eedc97d0cbef23de76a43dd6edb563bdb6e9407645b950a7a2d
const span = 20; // every 10-20 batches
const freq = 3600; // every hour?
return span * Math.ceil(sec / freq); // units of batchIndex
}
}
exports.EuclidRollup = EuclidRollup;
function makeBlobCanonical(blob) {
// https://github.com/scroll-tech/da-codec/blob/344f2d5e33e1930c63cd6a082ef77e27dbe50cea/encoding/da.go#L469
const N = 4096;
const v = new Uint8Array(N * 31);
for (let i = 0; i < N; i++) {
const offset = 4 + (i << 6);
v.set((0, utils_1.getBytes)('0x' + blob.slice(offset, offset + 62)), i * 31);
}
return v;
}
function lastBlockFromBlobV7(blob) {
//https://github.com/scroll-tech/da-codec/blob/344f2d5e33e1930c63cd6a082ef77e27dbe50cea/encoding/codecv7.go#L176
let v = makeBlobCanonical(blob);
if (v[0] != BATCH_VERSION) {
throw new Error(`unexpected version: ${v[0]}`);
}
const compressed = v[4];
if (compressed != 0 && compressed != 1) {
throw new Error(`unexpected compression: ${v[4]}`);
}
const size = (v[1] << 16) | (v[2] << 8) | v[3]; // uint24
if (compressed) {
v = v.slice(1, 5 + size);
// https://github.com/scroll-tech/da-codec/blob/344f2d5e33e1930c63cd6a082ef77e27dbe50cea/encoding/da.go#L50
v[0] = 0x28; // zstdMagicNumber
v[1] = 0xb5;
v[2] = 0x2f;
v[3] = 0xfd;
v = (0, fzstd_1.decompress)(v);
}
else {
v = v.subarray(5, 5 + size);
}
// https://github.com/scroll-tech/da-codec/blob/344f2d5e33e1930c63cd6a082ef77e27dbe50cea/encoding/codecv7_types.go#L275
if (v.length < 74)
throw new Error(`payload too small: ${v.length}`); // blobPayloadV7MinEncodedLength
const dv = new DataView(v.buffer, v.byteOffset, v.byteLength);
const l2BlockNumber = dv.getBigUint64(64); // blobPayloadV7OffsetInitialL2BlockNumber
const numBlocks = dv.getUint16(72); // blobPayloadV7OffsetNumBlocks
return l2BlockNumber + BigInt(numBlocks - 1);
}