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Merge pull request #4337 from MetaMask/recent-blocks-parallel

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controllers - recent-blocks - pull first historical blocks in parallel
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Frankie 2018-05-22 16:08:33 -07:00 committed by GitHub
commit ed01c6c826
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1 changed files with 7 additions and 15 deletions
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22
app/scripts/controllers/recent-blocks.js
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@ -119,29 +119,21 @@ class RecentBlocksController {
*/ */
async backfill() { async backfill() {
this.blockTracker.once('block', async (block) => { this.blockTracker.once('block', async (block) => {
let blockNum = block.number const currentBlockNumber = Number.parseInt(block.number, 16)
let recentBlocks const blocksToFetch = Math.min(currentBlockNumber, this.historyLength)
let state = this.store.getState() const prevBlockNumber = currentBlockNumber - 1
recentBlocks = state.recentBlocks const targetBlockNumbers = Array(blocksToFetch).fill().map((_, index) => prevBlockNumber - index)
await Promise.all(targetBlockNumbers.map(async (targetBlockNumber) => {
while (recentBlocks.length < this.historyLength) {
try { try {
let blockNumBn = new BN(blockNum.substr(2), 16) const newBlock = await this.getBlockByNumber(targetBlockNumber)
const newNum = blockNumBn.subn(1).toString(10)
const newBlock = await this.getBlockByNumber(newNum)
if (newBlock) { if (newBlock) {
this.backfillBlock(newBlock) this.backfillBlock(newBlock)
blockNum = newBlock.number
} }
state = this.store.getState()
recentBlocks = state.recentBlocks
} catch (e) { } catch (e) {
log.error(e) log.error(e)
} }
await this.wait() }))
}
}) })
} }