@arturwojnar/hermes-postgresql/lib/subscribeToReplicationSlot/sendStandbyStatusUpdate.js

Production-Ready TypeScript Outbox Pattern for PostgreSQL

import { toServerSystemClock } from '../common/helpers.js';
import { incrementWAL } from '../common/lsn.js';
import { offset } from '../common/offset.js';
import { Bytes } from './types.js';
const createStandbyStatusUpdate = (lsn) => {
    const x = Buffer.alloc(34);
    const pos = offset(Bytes.Int8);
    const lsnInt = incrementWAL(lsn);
    x[0] = 'r'.charCodeAt(0);
    x.writeBigUInt64BE(lsnInt, pos.value());
    x.writeBigUInt64BE(lsnInt, pos.addInt64());
    x.writeBigUInt64BE(lsnInt, pos.addInt64());
    x.writeBigInt64BE(toServerSystemClock(Date.now()), pos.addInt64());
    x.writeUInt8(0, pos.addInt8());
    return x;
};
const sendStandbyStatusUpdate = (stream, getLastAcknowledgedLsn) => () => {
    if (!stream) {
        return;
    }
    const statusUpdate = createStandbyStatusUpdate(getLastAcknowledgedLsn());
    stream.write(statusUpdate);
};
export { sendStandbyStatusUpdate };
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