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@ -3,6 +3,7 @@ const createAsyncMiddleware = require('json-rpc-engine/src/createAsyncMiddleware |
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const createBlockReEmitMiddleware = require('eth-json-rpc-middleware/block-reemit') |
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const createBlockCacheMiddleware = require('eth-json-rpc-middleware/block-cache') |
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const createInflightMiddleware = require('eth-json-rpc-middleware/inflight-cache') |
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const createBlockTrackerInspectorMiddleware = require('eth-json-rpc-middleware/block-tracker-inspector') |
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const providerFromMiddleware = require('eth-json-rpc-middleware/providerFromMiddleware') |
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const createInfuraMiddleware = require('eth-json-rpc-infura') |
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const BlockTracker = require('eth-block-tracker') |
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@ -15,23 +16,11 @@ function createInfuraClient ({ network }) { |
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const blockTracker = new BlockTracker({ provider: blockProvider }) |
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const networkMiddleware = mergeMiddleware([ |
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createBlockReEmitMiddleware({ blockTracker, provider: blockProvider }), |
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createBlockCacheMiddleware({ blockTracker }), |
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createInflightMiddleware(), |
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createBlockReEmitMiddleware({ blockTracker, provider: blockProvider }), |
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createBlockTrackerInspectorMiddleware({ blockTracker }), |
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infuraMiddleware, |
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]) |
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return { networkMiddleware, blockTracker } |
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} |
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// inspect if response contains a block ref higher than our latest block
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const futureBlockRefRequests = ['eth_getTransactionByHash', 'eth_getTransactionReceipt'] |
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function createBlockTrackerInspectorMiddleware ({ blockTracker }) { |
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return createAsyncMiddleware(async (req, res, next) => { |
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if (!futureBlockRefRequests.includes(req.method)) return next() |
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await next() |
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const blockNumber = Number.parseInt(res.result.blockNumber, 16) |
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const currentBlockNumber = Number.parseInt(blockTracker.getCurrentBlock(), 16) |
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if (blockNumber > currentBlockNumber) await blockTracker.checkForLatestBlock() |
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}) |
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} |
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