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• .. (вверх)
• [DIR] ..
• [FILE] bestNumber.d.ts
• [FILE] bestNumber.js
• [FILE] bestNumberFinalized.d.ts
• [FILE] bestNumberFinalized.js
• [FILE] bestNumberLag.d.ts
• [FILE] bestNumberLag.js
• [FILE] getBlock.d.ts
• [FILE] getBlock.js
• [FILE] getBlockByNumber.d.ts
• [FILE] getBlockByNumber.js
• [FILE] getHeader.d.ts
• [FILE] getHeader.js
• [FILE] index.d.ts
• [FILE] index.js
• [FILE] subscribeFinalizedBlocks.d.ts
• [FILE] subscribeFinalizedBlocks.js
• [FILE] subscribeFinalizedHeads.d.ts
• [FILE] subscribeFinalizedHeads.js
• [FILE] subscribeNewBlocks.d.ts
• [FILE] subscribeNewBlocks.js
• [FILE] subscribeNewHeads.d.ts
• [FILE] subscribeNewHeads.js
• [FILE] util.d.ts
• [FILE] util.js

Просмотр файла: bestNumberLag.js

import { combineLatest, map } from 'rxjs';
import { memo } from '../util/index.js';
/**
 * @name bestNumberLag
 * @returns A number of blocks
 * @description Calculates the lag between finalized head and best head
 * @example
 * <BR>
 *
 * ```javascript
 * api.derive.chain.bestNumberLag((lag) => {
 *   console.log(`finalized is ${lag} blocks behind head`);
 * });
 * ```
 */
export function bestNumberLag(instanceId, api) {
    return memo(instanceId, () => combineLatest([
        api.derive.chain.bestNumber(),
        api.derive.chain.bestNumberFinalized()
    ]).pipe(map(([bestNumber, bestNumberFinalized]) => api.registry.createType('BlockNumber', bestNumber.sub(bestNumberFinalized)))));
}

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