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