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const ObservableStore = require('obs-store')
const normalizeAddress = require('eth-sig-util').normalize
const extend = require('xtend')
class PreferencesController {
constructor (opts = {}) {
const initState = extend({
frequentRpcList: [],
}, opts.initState)
this.store = new ObservableStore(initState)
}
//
// PUBLIC METHODS
//
setSelectedAddress (_address) {
return new Promise((resolve, reject) => {
const address = normalizeAddress(_address)
this.store.updateState({ selectedAddress: address })
resolve()
})
}
getSelectedAddress (_address) {
return this.store.getState().selectedAddress
}
updateFrequentRpcList (_url) {
return this.addToFrequentRpcList(_url)
.then((rpcList) => {
this.store.updateState({ frequentRpcList: rpcList })
return Promise.resolve()
})
}
addToFrequentRpcList (_url) {
const rpcList = this.getFrequentRpcList()
const index = rpcList.findIndex((element) => { return element === _url })
if (index !== -1) {
rpcList.splice(index, 1)
}
if (_url !== 'http://localhost:8545') {
rpcList.push(_url)
}
if (rpcList.length > 2) {
rpcList.shift()
}
return Promise.resolve(rpcList)
}
getFrequentRpcList () {
return this.store.getState().frequentRpcList
}
//
// PRIVATE METHODS
//
}
module.exports = PreferencesController
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