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const mergeMiddleware = require('json-rpc-engine/src/mergeMiddleware')
const createAsyncMiddleware = require('json-rpc-engine/src/createAsyncMiddleware')
const createBlockReEmitMiddleware = require('eth-json-rpc-middleware/block-reemit')
const createBlockCacheMiddleware = require('eth-json-rpc-middleware/block-cache')
const createInflightMiddleware = require('eth-json-rpc-middleware/inflight-cache')
const createBlockTrackerInspectorMiddleware = require('eth-json-rpc-middleware/block-tracker-inspector')
const providerFromMiddleware = require('eth-json-rpc-middleware/providerFromMiddleware')
const createInfuraMiddleware = require('eth-json-rpc-infura')
const BlockTracker = require('eth-block-tracker')
module.exports = createInfuraClient
function createInfuraClient ({ network }) {
const infuraMiddleware = createInfuraMiddleware({ network })
const blockProvider = providerFromMiddleware(infuraMiddleware)
const blockTracker = new BlockTracker({ provider: blockProvider })
const networkMiddleware = mergeMiddleware([
createBlockCacheMiddleware({ blockTracker }),
createInflightMiddleware(),
createBlockReEmitMiddleware({ blockTracker, provider: blockProvider }),
createBlockTrackerInspectorMiddleware({ blockTracker }),
infuraMiddleware,
])
return { networkMiddleware, blockTracker }
}
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