a13a649b77
Aere Network public source. Everything here can be checked against the live chain (chain id 2800, https://rpc.aere.network). Scope note, stated up front rather than buried: consensus on chain 2800 is classical secp256k1 ECDSA QBFT. The post-quantum work in this repository is at the signature, precompile, account and transport layers. Nothing here makes the consensus post-quantum, and no document in it should be read as claiming so.
57 lines
2.2 KiB
JavaScript
57 lines
2.2 KiB
JavaScript
// Shared RLP block-header encoder used by the anchor tests.
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//
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// Adaptive standard-Ethereum header encoder: it appends the London / Shanghai /
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// Cancun / Prague trailing fields only when the block object carries them, which
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// mirrors how a node serializes its header. This lets one function reconstruct
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// - AERE's genesis block (Shanghai layout, 17 fields), which it matches exactly, and
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// - the local hardhat block under either the "shanghai" or "cancun" hardfork.
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//
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// QBFT note: AERE is a Hyperledger Besu QBFT chain. For the canonical block
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// hash of a NON-genesis block, Besu strips the commit seals out of extraData
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// before hashing, and the exact post-Cancun serialization was not reproducible
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// from eth_getBlockByNumber alone (see the deploy script's header sourcing).
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// The anchor CONTRACT is agnostic to all of this: it only checks
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// keccak256(header) == blockhash and reads stateRoot at a fixed offset.
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const { ethers } = require("ethers");
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// RLP-encode an integer quantity with minimal big-endian bytes (0 -> "0x").
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function q(hexOrNum) {
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let v = BigInt(hexOrNum);
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if (v === 0n) return "0x";
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let s = v.toString(16);
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if (s.length % 2) s = "0" + s;
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return "0x" + s;
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}
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// Build the RLP header bytes for a standard-Ethereum header object `b`
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// (fields are 0x-hex strings as returned by eth_getBlockByNumber).
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function encodeHeader(b) {
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const fields = [
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b.parentHash,
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b.sha3Uncles,
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b.miner,
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b.stateRoot,
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b.transactionsRoot,
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b.receiptsRoot,
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b.logsBloom,
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q(b.difficulty),
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q(b.number),
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q(b.gasLimit),
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q(b.gasUsed),
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q(b.timestamp),
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b.extraData && b.extraData !== "0x" ? b.extraData : "0x",
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b.mixHash,
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b.nonce,
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];
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if (b.baseFeePerGas != null) fields.push(q(b.baseFeePerGas)); // London
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if (b.withdrawalsRoot != null) fields.push(b.withdrawalsRoot); // Shanghai
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if (b.blobGasUsed != null) fields.push(q(b.blobGasUsed)); // Cancun
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if (b.excessBlobGas != null) fields.push(q(b.excessBlobGas)); // Cancun
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if (b.parentBeaconBlockRoot != null) fields.push(b.parentBeaconBlockRoot); // Cancun
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if (b.requestsHash != null) fields.push(b.requestsHash); // Prague
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return ethers.encodeRlp(fields);
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}
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module.exports = { q, encodeHeader };
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