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64 lines
2.2 KiB
64 lines
2.2 KiB
const mergeMiddleware = require('json-rpc-engine/src/mergeMiddleware')
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const createScaffoldMiddleware = require('json-rpc-engine/src/createScaffoldMiddleware')
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const createBlockReRefMiddleware = require('eth-json-rpc-middleware/block-ref')
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const createRetryOnEmptyMiddleware = require('eth-json-rpc-middleware/retryOnEmpty')
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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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module.exports = createInfuraClient
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function createInfuraClient ({ network }) {
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const infuraMiddleware = createInfuraMiddleware({ network, maxAttempts: 5, source: 'metamask' })
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const infuraProvider = providerFromMiddleware(infuraMiddleware)
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const blockTracker = new BlockTracker({ provider: infuraProvider })
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const networkMiddleware = mergeMiddleware([
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createNetworkAndChainIdMiddleware({ network }),
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createBlockCacheMiddleware({ blockTracker }),
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createInflightMiddleware(),
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createBlockReRefMiddleware({ blockTracker, provider: infuraProvider }),
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createRetryOnEmptyMiddleware({ blockTracker, provider: infuraProvider }),
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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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function createNetworkAndChainIdMiddleware ({ network }) {
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let chainId
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let netId
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switch (network) {
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case 'mainnet':
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netId = '1'
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chainId = '0x01'
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break
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case 'ropsten':
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netId = '3'
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chainId = '0x03'
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break
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case 'rinkeby':
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netId = '4'
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chainId = '0x04'
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break
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case 'kovan':
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netId = '42'
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chainId = '0x2a'
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break
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case 'goerli':
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netId = '5'
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chainId = '0x05'
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break
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default:
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throw new Error(`createInfuraClient - unknown network "${network}"`)
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}
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return createScaffoldMiddleware({
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eth_chainId: chainId,
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net_version: netId,
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})
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}
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