@vbel/adapter-solana

Anchors a record's hash on Solana through the SPL Memo program, with no custom program, and turns a Solana wallet into a Signer so a person can read what they approve.

pnpm add @vbel/adapter-solana

Anchor a hash

import { SolanaMemoAdapter, loadSolanaConfig } from "@vbel/adapter-solana";

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

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

loadSolanaConfig reads SOLANA_RPC_URL, SOLANA_NETWORK (devnet or mainnet-beta) and SOLANA_ISSUER_SECRET_KEY. The memo carries the hash and a little public metadata, at most MAX_MEMO_BYTES (900) in all. The account that pays is the issuer key, which is not a signer of your records.

Sign with a wallet

import { solanaWalletSigner } from "@vbel/adapter-solana";

// Anything with an `address` and `signMessage(bytes)`, such as a browser wallet.
const signer = solanaWalletSigner(wallet);

The returned Signer goes wherever @vbel/core accepts a key, and the wallet shows the person a message they can read rather than a bare hash.

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.