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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,109 @@ | ||
| /* | ||
| * LiskHQ/lisk-service | ||
| * Copyright © 2024 Lisk Foundation | ||
| * | ||
| * See the LICENSE file at the top-level directory of this distribution | ||
| * for licensing information. | ||
| * | ||
| * Unless otherwise agreed in a custom licensing agreement with the Lisk Foundation, | ||
| * no part of this software, including this file, may be copied, modified, | ||
| * propagated, or distributed except according to the terms contained in the | ||
| * LICENSE file. | ||
| * | ||
| * Removal or modification of this copyright notice is prohibited. | ||
| * | ||
| */ | ||
| const { | ||
| CacheRedis, | ||
| Signals, | ||
| Utils: { isObject }, | ||
| } = require('lisk-service-framework'); | ||
|
|
||
| const config = require('../../config'); | ||
| const { requestConnector } = require('./request'); | ||
|
|
||
| let genesisHeight; | ||
| let blockTime; | ||
| let latestBlock; | ||
|
|
||
| const { emaBatchSize } = config.feeEstimates; | ||
|
|
||
| const blockByHeightCache = CacheRedis('blockByHeight', config.endpoints.cache); | ||
|
|
||
| const isValidBlock = block => { | ||
| if (!isObject(block)) return false; | ||
| return 'assets' in block && 'header' in block && 'transactions' in block; | ||
| }; | ||
|
|
||
| const setLatestBlock = block => { | ||
| if (isValidBlock(block)) latestBlock = block; | ||
| }; | ||
|
|
||
| const getLatestBlock = async () => { | ||
| if (typeof latestBlock !== 'object') { | ||
| latestBlock = await requestConnector('getLastBlock'); | ||
| } | ||
| return latestBlock; | ||
| }; | ||
|
|
||
| const getBlockTime = async () => { | ||
| if (typeof blockTime !== 'number') { | ||
| const nodeInfo = await requestConnector('getNodeInfo'); | ||
| blockTime = nodeInfo.genesis.blockTime; | ||
| } | ||
| return blockTime; | ||
| }; | ||
|
|
||
| const getGenesisHeight = async () => { | ||
| if (typeof genesisHeight !== 'number') { | ||
| genesisHeight = await requestConnector('getGenesisHeight'); | ||
| } | ||
| return genesisHeight; | ||
| }; | ||
|
|
||
| const cacheBlockByHeight = async block => { | ||
| try { | ||
| if (isValidBlock(block)) { | ||
| const numBlocksToKeep = emaBatchSize * 2; | ||
| const blockTimeInMs = (await getBlockTime()) * 1000; | ||
|
|
||
| await blockByHeightCache.set( | ||
| block.header.height, | ||
| JSON.stringify(block), | ||
| numBlocksToKeep * blockTimeInMs, | ||
| ); | ||
| } | ||
| } catch (_) { | ||
| // No actions to be taken | ||
| } | ||
| }; | ||
|
|
||
| const emptyCacheBlockByHeight = async block => { | ||
| try { | ||
| if (isValidBlock(block)) { | ||
| await blockByHeightCache.delete(block.header.height); | ||
| } | ||
| } catch (_) { | ||
| // No actions to be taken | ||
| } | ||
| }; | ||
|
|
||
| const getBlockByHeight = async height => { | ||
| const blockStr = await blockByHeightCache.get(height); | ||
| if (blockStr) return JSON.parse(blockStr); | ||
|
|
||
| const block = await requestConnector('getBlockByHeight', { height }); | ||
| await cacheBlockByHeight(block); | ||
| return block; | ||
| }; | ||
|
|
||
| Signals.get('newBlock').add(setLatestBlock); | ||
| Signals.get('newBlock').add(cacheBlockByHeight); | ||
| Signals.get('deleteBlock').add(emptyCacheBlockByHeight); | ||
|
|
||
| module.exports = { | ||
| setLatestBlock, | ||
| getLatestBlock, | ||
| getGenesisHeight, | ||
| getBlockByHeight, | ||
| }; |
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