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content.js
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content.js
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const baseUrl = 'https://api.explorer.nervos.org/';
const addrAPI = `${baseUrl}api/v1/addresses`
const headers = new Headers({
'Content-Type': "application/vnd.api+json",
"Accept": "application/vnd.api+json"
})
const storageKey = {
addresses: 'addresses',
balances: 'balances',
lastUpdateTime: 'lastUpdateTime'
}
const updateBalnace = async () => {
const addresses = await new Promise((resolve) => {
chrome.storage.local.get(storageKey.addresses, s => {
return Array.isArray(s.addresses) ? resolve(s.addresses) : resolve([])
})
})
const balances = await Promise.all(addresses.map(addr => fetch(`${addrAPI}/${addr}`, {
mode: 'cors',
headers
}).then(res => {
if (res.status === 200) {
return res.json()
} else {
throw new Error("nework error")
}
}).then(res => {
return res.data.attributes.balance !== undefined ? res.data.attributes.balance : ''
}).catch(() => '')))
const tuples = addresses.map((addr, idx) => [addr, balances[idx]])
chrome.storage.local.set({
[storageKey.balances]: tuples
})
chrome.storage.local.set({
[storageKey.lastUpdateTime]: Date.now()
})
}
// button
const appendSubBtnOnAddr = () => {
let subscribed = false
const subBtnId = 'ckb_enhanced_subscribe'
const addr = window.location.href.split('/').pop()
let btn = document.querySelector(`#${subBtnId}`)
if (!btn) {
btn = document.createElement('button')
btn.id = subBtnId
btn.className = 'btn'
}
chrome.storage.local.get(storageKey.addresses, (s) => {
const addrs = Array.isArray(s.addresses) ? s.addresses : []
subscribed = addrs.includes(addr)
btn.innerText = subscribed ? 'Unsubscribe' : 'Subscribe'
btn.addEventListener('click', () => {
if (subscribed) {
chrome.storage.local.set({
[storageKey.addresses]: addrs.filter(a => a !== addr)
}, () => {
btn.innerText = 'Subscribe'
})
} else {
chrome.storage.local.set({
[storageKey.addresses]: [...new Set([...addrs, addr])]
}, () => {
btn.innerText = 'Unsubscribe'
updateBalnace()
})
}
subscribed = !subscribed
})
})
const addrContainer = document.querySelector('#hash_content')
if (addrContainer) {
addrContainer.appendChild(btn)
}
}
setInterval(() => {
updateBalnace()
}, 10000)
chrome.runtime.onMessage.addListener((req, sender, sendResponse) => {
switch (req.type) {
case "AppendAddressBtn": {
appendSubBtnOnAddr()
break;
}
}
})