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metamask-extension/app/scripts/controllers/network/createLocalhostClient.js

22 lines
1.0 KiB
JavaScript

const mergeMiddleware = require('json-rpc-engine/src/mergeMiddleware')
const createFetchMiddleware = require('eth-json-rpc-middleware/fetch')
const createBlockRefRewriteMiddleware = require('eth-json-rpc-middleware/block-ref-rewrite')
const createBlockTrackerInspectorMiddleware = require('eth-json-rpc-middleware/block-tracker-inspector')
const providerFromMiddleware = require('eth-json-rpc-middleware/providerFromMiddleware')
const BlockTracker = require('eth-block-tracker')
module.exports = createLocalhostClient
function createLocalhostClient () {
const fetchMiddleware = createFetchMiddleware({ rpcUrl: 'http://localhost:8545/' })
const blockProvider = providerFromMiddleware(fetchMiddleware)
const blockTracker = new BlockTracker({ provider: blockProvider, pollingInterval: 1000 })
const networkMiddleware = mergeMiddleware([
createBlockRefRewriteMiddleware({ blockTracker }),
createBlockTrackerInspectorMiddleware({ blockTracker }),
fetchMiddleware,
])
return { networkMiddleware, blockTracker }
}