@nervosnetwork/ckb-sdk-utils/lib-esm/epochs.js

Utils module of @nervosnetwork/ckb-sdk-core

import JSBI from 'jsbi';
import { assertToBeHexString } from './validators.js';
export const serializeEpoch = ({ length, index, number }) => {
    assertToBeHexString(length);
    assertToBeHexString(index);
    assertToBeHexString(number);
    const epochSince = JSBI.add(JSBI.add(JSBI.add(JSBI.leftShift(JSBI.BigInt(0x20), JSBI.BigInt(56)), JSBI.leftShift(JSBI.BigInt(length), JSBI.BigInt(40))), JSBI.leftShift(JSBI.BigInt(index), JSBI.BigInt(24))), JSBI.BigInt(number));
    return `0x${epochSince.toString(16)}`;
};
export const parseEpoch = (epoch) => ({
    length: `0x${JSBI.bitwiseAnd(JSBI.signedRightShift(JSBI.BigInt(epoch), JSBI.BigInt(40)), JSBI.BigInt(0xffff)).toString(16)}`,
    index: `0x${JSBI.bitwiseAnd(JSBI.signedRightShift(JSBI.BigInt(epoch), JSBI.BigInt(24)), JSBI.BigInt(0xffff)).toString(16)}`,
    number: `0x${JSBI.bitwiseAnd(JSBI.BigInt(epoch), JSBI.BigInt(0xffffff)).toString(16)}`,
});
export const getWithdrawEpoch = (depositEpoch, withdrawingEpoch) => {
    const EPOCHS_PER_WITHDRAW_CYCLE = 180;
    const depositEpochInfo = parseEpoch(depositEpoch);
    const withdrawingEpochInfo = parseEpoch(withdrawingEpoch);
    let depositedEpochCount = +withdrawingEpochInfo.number - +depositEpochInfo.number;
    if (+withdrawingEpochInfo.index * +depositEpochInfo.length > +depositEpochInfo.index * +withdrawingEpochInfo.length) {
        depositedEpochCount += 1;
    }
    const minEpockCountToLock = depositedEpochCount <= EPOCHS_PER_WITHDRAW_CYCLE
        ? EPOCHS_PER_WITHDRAW_CYCLE
        : (Math.floor((depositedEpochCount - 1) / EPOCHS_PER_WITHDRAW_CYCLE) + 1) * EPOCHS_PER_WITHDRAW_CYCLE;
    return serializeEpoch({
        index: depositEpochInfo.index,
        length: depositEpochInfo.length,
        number: `0x${(+depositEpochInfo.number + minEpockCountToLock).toString(16)}`,
    });
};
export default {
    serializeEpoch,
    parseEpoch,
    getWithdrawEpoch,
};
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