leap-node/src/api/methods/getPeriodByBlockHeight.js

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const { Period } = require('leap-core');

module.exports = async (bridgeState, db, heightOrTag) => {
  let height = heightOrTag;
  if (heightOrTag === 'latest') {
    height = bridgeState.blockHeight;
  } else if (typeof height === 'string' && height.startsWith('0x')) {
    height = parseInt(height, 16);
  }
  const [periodStart, periodEnd] = Period.periodBlockRange(height);
  const periodData = await db.getPeriodData(periodStart);
  if (!periodData) return null;
  return { periodStart, periodEnd, ...periodData };
};