@vbel/adapter-ethereum

Anchors a record's hash in the calldata of a zero-value transaction on an EVM chain.

pnpm add @vbel/adapter-ethereum

Anchor a hash

import { EthereumLedgerAdapter, loadEthereumConfig } from "@vbel/adapter-ethereum";

// Read the environment once, at your entry point. The adapter itself never touches process.env.
const adapter = new EthereumLedgerAdapter(loadEthereumConfig());

const receipt = await adapter.anchor(event.eventHash);
const check = await adapter.verify(receipt, event.eventHash); // { valid, issues }

loadEthereumConfig reads ETHEREUM_RPC_URL, ETHEREUM_NETWORK (sepolia or mainnet) and ETHEREUM_ISSUER_PRIVATE_KEY. encodeCalldata and decodeCalldata are exported for anyone who wants to read an anchor without this adapter.

Both chain adapters implement the same LedgerAdapter interface from @vbel/core, so changing chain is changing one constructor.

An anchor proves a hash existed by the time of the transaction. It says nothing about what the record means.

Part of VBEL

Signed, hash-chained records that anyone can check for changes, with optional anchoring on a public chain. The repository readme says what that does and does not prove.

Apache-2.0.