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index.js
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index.js
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import web3 from './web3.js'
const state = {
ethListening: false,
ethAddress: undefined,
ethBalance: undefined,
ethNetworkId: undefined
}
const getters = {
// We use the window's web3Instance
getWeb3Instance: state => {
return window.web3Instance
},
getEthListening: state => state.ethListening,
getEthNetworkId: state => state.ethNetworkId,
getEthAddress: state => state.ethAddress,
getEthBalance: state => state.ethBalance
}
const mutations = {
setEthListening(state, listening) {
state.ethListening = listening
},
setEthNetworkId (state, networkId) {
state.ethNetworkId = networkId
},
setEthAddress (state, address) {
state.ethAddress = address
},
error(state, error) {
console.log('Error:', error)
},
setEthBalance (state, {address, balance}) {
state.ethBalance = balance
}
}
const actions = {
fetchWeb3Instance (context) {
return web3.fetchWeb3Instance()
.then(response => {
window.web3Instance = response
// Watch for changes in the listening state
setInterval(function () {
if (window.web3Instance) {
web3.fetchEthListening(window.web3Instance)
.then(response => {
if (state.ethNetworkId !== Number(response)) {
// Listening state has changed
context.commit('setEthListening', response)
}
})
.catch(error => context.commit('error', error))
}
}, 500)
// Watch for changes in the network ID
setInterval(function () {
if (window.web3Instance && state.ethListening) {
web3.fetchEthNetworkId(window.web3Instance)
.then(response => {
if (state.ethNetworkId !== Number(response)) {
// Network ID has changed
context.commit('setEthNetworkId', response)
context.dispatch('fetchEthBalance')
}
})
.catch(error => context.commit('error', error))
}
}, 500)
// Watch for changes in the selected address
setInterval(function () {
if (window.web3Instance && state.ethListening) {
web3.fetchEthAddress(window.web3Instance)
.then(response => {
if (state.ethAddress !== response) {
// Address has changed
context.commit('setEthAddress', response)
context.dispatch('fetchEthBalance')
}
})
.catch(error => context.commit('error', error))
}
}, 500)
// Watch for changes in the selected address' balance
setInterval(function () {
if (window.web3Instance && state.ethListening) {
web3.fetchEthBalance(window.web3Instance, state.ethAddress)
.then(response => {
if (state.ethBalance !== response.balance) {
// Balance has changed
context.commit('setEthBalance', response)
}
})
.catch(error => context.commit('error', error))
}
}, 500)
})
.catch(error => {
if (error.toString() === 'Error: No provider') {
// There is no provider so no web3. We commit the mainnet
// network ID and nothing else
context.commit('setEthNetworkId', 1)
} else {
// Some other error; pass it along
context.commit('error', error)
}
})
},
fetchEthListening (context) {
return web3.fetchEthListening(window.web3Instance)
.then(response => context.commit('setEthListening', response))
.catch(error => context.commit('error', error))
},
fetchEthNetworkId (context) {
return web3.fetchEthNetworkId(window.web3Instance)
.then(response => context.commit('setEthNetworkId', response))
.catch(error => context.commit('error', error))
},
fetchEthAddress (context) {
return web3.fetchEthAddress(window.web3Instance)
.then(response => {
context.commit('setEthAddress', response)
})
.catch(error => context.commit('error', error))
},
fetchEthBalance (context) {
return web3.fetchEthBalance(window.web3Instance, state.ethAddress)
.then(response => context.commit('setEthBalance', response))
.catch(error => context.commit('error', error))
}
}
export default {
getters,
state,
mutations,
actions
}