trusted-setup-server/pages/make-contribution.vue

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<template>
<div class="ceremony">
<h1 class="title is-size-1 is-size-2-mobile is-spaced">
Hello, <span>@{{ userHandle }}</span>
</h1>
<h2 class="subtitle">
How would you like to contribute to the Tornado.cash Trusted Setup Ceremony?
</h2>
<fieldset :disabled="status.type === 'is-success'">
<div class="columns is-centered">
<div class="column is-one-third">
<button
:class="{ 'is-hovered': contributionType === 'anonymous' }"
@click="onAnonymousHandler"
class="box box-anonymous"
>
<div class="title is-5">Anonymously</div>
<Cloak />
</button>
</div>
<div class="column is-one-third">
<div :class="{ 'is-hovered': isLoggedIn }" class="box">
<div class="title is-5">By using social account</div>
<Form />
</div>
</div>
</div>
</fieldset>
<div v-show="contributionHash" class="status">
<div class="label">Your contribution hash (Blake2b)</div>
<b-field position="is-centered" class="has-addons contribution-hash">
<b-input
@click.native="copyContributionHash"
:value="contributionHash"
icon="copy"
readonly
></b-input>
</b-field>
</div>
<div v-show="status.type !== ''" class="status">
<div :class="status.type" class="status-message">{{ status.msg }}</div>
<div
v-show="status.type === 'is-success' && contributionType !== 'anonymous'"
class="status-message is-success"
>
And now you can post your attestation to Twitter.
<div class="buttons is-centered">
<b-button @click="makeTweet" type="is-primary" tag="a" target="_blank" outlined>
Post attestation
</b-button>
</div>
</div>
</div>
<div v-show="authorizeLink" class="status">
You can still provide identity for your contribution by following
<a :href="authorizeLink" class="has-text-primary">this link</a>.
</div>
<div class="buttons is-centered">
<b-button
v-if="!isContributeBtnSnown"
@click="getUserRandom"
:disabled="isContributeBtnDisabled"
type="is-primary"
outlined
>
Contribute
</b-button>
</div>
<p class="p">
If you dont trust binaries, we encorage you to follow these
<router-link to="/instructions">instructions</router-link> to contribute by compiling from the
source code. It is fairly easy!
</p>
</div>
</template>
<script>
/* eslint-disable no-console */
import { mapGetters, mapActions } from 'vuex'
import Cloak from '@/components/Cloak'
import Form from '@/components/Form'
const timeout = (ms) => new Promise((resolve) => setTimeout(resolve, ms))
function buf2hex(buffer) {
// buffer is an ArrayBuffer
return Array.prototype.map
.call(new Uint8Array(buffer), (x) => ('00' + x.toString(16)).slice(-2))
.join('')
}
export default {
components: {
Cloak,
Form
},
data() {
return {
isContributeBtnSnown: false,
status: {
type: '',
msg: ''
},
contributionHash: null,
authorizeLink: null
}
},
computed: {
...mapGetters('user', ['isLoggedIn', 'hasErrorName']),
userName: {
get() {
return this.$store.state.user.name
},
set(value) {
this.$store.commit('user/SET_NAME', value)
}
},
userHandle: {
get() {
return this.$store.state.user.handle
},
set(value) {
this.$store.commit('user/SET_HANDLE', value)
}
},
userCompany: {
get() {
return this.$store.state.user.company
},
set(value) {
this.$store.commit('user/SET_COMPANY', value)
}
},
contributionType: {
get() {
return this.$store.state.user.contributionType
},
set(value) {
this.$store.commit('user/SET_CONTRIBUTION_TYPE', value)
}
},
isContributeBtnDisabled() {
return (
!this.contributionType ||
(!this.isLoggedIn && this.contributionType !== 'anonymous') ||
this.hasErrorName.invalid
)
}
},
async mounted() {
this.$root.$emit('enableLoading')
await this.getUserData()
setTimeout(() => {
this.$root.$emit('disableLoading')
}, 800)
},
methods: {
...mapActions('user', ['makeTweet', 'logOut', 'getUserData']),
getUserRandom() {
this.$buefy.dialog.prompt({
title: 'Contribution',
message: `Please provide your random input that will be used as a source of entropy for your contribution along with browser's RNG.`,
inputAttrs: {
maxlength: 300
},
confirmText: 'Contribute',
trapFocus: true,
onConfirm: (userInput) => {
this.makeContribution({ userInput })
}
})
},
async makeContribution({ userInput, retry = 0 } = {}) {
try {
const contribute = await this.$contribute()
this.isContributeBtnSnown = true
this.status.msg = ''
this.status.type = ''
this.$root.$emit('enableLoading', 'Downloading last contribution')
let data = await fetch('api/challenge')
data = new Uint8Array(await data.arrayBuffer())
this.$root.$emit(
'enableLoading',
'Generating random contribution. Your browser may appear unresponsive. It can take a minute or so to complete'
)
await timeout(100) // allow UI to update before freezing in wasm
console.log('Source params', data)
const msgBuffer = new TextEncoder('utf-8').encode(userInput)
const hashBuffer = await window.crypto.subtle.digest('SHA-256', msgBuffer)
const entropyFromUser = new Uint8Array(hashBuffer)
// console.log('entropyFromUser', entropyFromUser.toString())
const entropyFromBrowser = window.crypto.getRandomValues(new Uint8Array(32))
// console.log('entropyFromBrowser', entropyFromBrowser.toString())
// suffle the browser and user random
const entropy = new Uint8Array(entropyFromBrowser.length)
for (let i = 0; i < entropyFromBrowser.length; i++) {
entropy[i] = entropyFromBrowser[i] + entropyFromUser[i]
}
// console.log('entropy', entropy)
await this.sleep(100) // so browser can render the messages
const result = contribute(data, entropy)
console.log('Updated params', result)
const hash = '0x' + buf2hex(result.slice(0, 64))
const contribution = result.slice(64)
console.log('hash', hash)
console.log('contribution', contribution)
this.$root.$emit('enableLoading', 'Uploading and verifying your contribution')
const formData = new FormData()
formData.append('response', new Blob([contribution], { type: 'application/octet-stream' }))
if (this.contributionType !== 'anonymous') {
formData.append('name', this.userName)
formData.append('company', this.userCompany)
}
const resp = await fetch('api/response', {
method: 'POST',
body: formData
})
if (resp.ok) {
const responseData = await resp.json()
this.$store.commit('user/SET_CONTRIBUTION_INDEX', responseData.contributionIndex)
this.status.msg = 'Your contribution has been verified and recorded.'
this.status.type = 'is-success'
this.contributionHash = hash
if (this.contributionType === 'anonymous') {
this.authorizeLink = `${window.location.origin}/authorize-contribution?token=${responseData.token}`
}
} else if (resp.status === 422) {
if (retry < 3) {
console.log(`Looks like someone else uploaded contribution ahead of us, retrying`)
await this.makeContribution({ userInput, retry: retry++ })
} else {
this.status.msg = `Failed to upload your contribution after ${retry} attempts`
this.status.type = 'is-danger'
this.isContributeBtnSnown = false
}
} else {
this.status.msg = 'Error uploading your contribution'
this.status.type = 'is-danger'
this.isContributeBtnSnown = false
}
} catch (e) {
console.error(e)
this.status.msg = e.message
this.status.type = 'is-danger'
this.isContributeBtnSnown = false
} finally {
this.$root.$emit('disableLoading')
}
},
onAnonymousHandler() {
this.logOut()
this.contributionType = 'anonymous'
},
copyContributionHash() {
navigator.clipboard.writeText(this.contributionHash).then(() => {
this.$buefy.toast.open({
message: 'Copied!',
type: 'is-primary'
})
})
},
sleep(ms) {
return new Promise((resolve) => setTimeout(resolve, ms))
}
}
}
</script>