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feat(notifications): prepare for background notifications
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,152 @@ | ||
| import { useCallback, useEffect, useState } from 'react' | ||
| import KlerosLiquid from '../assets/contracts/kleros-liquid.json' | ||
| import Web3 from 'web3' | ||
|
|
||
| const networkIDData = { | ||
| 1: { name: 'MAINNET', provider: 'https://mainnet.infura.io' }, | ||
| 42: { name: 'KOVAN', provider: 'https://kovan.infura.io' } | ||
| } | ||
| const handlers = { | ||
| async AppealDecision(_, klerosLiquid, block, event) { | ||
| const dispute = await klerosLiquid.methods | ||
| .disputes(event.returnValues._disputeID) | ||
| .call() | ||
| if (dispute.period !== '4') { | ||
| const notification = { | ||
| date: new Date(block.timestamp * 1000), | ||
| message: `Case #${event.returnValues._disputeID} has been appealed.`, | ||
| to: `/cases/${event.returnValues._disputeID}`, | ||
| type: 'info' | ||
| } | ||
| return (await klerosLiquid.getPastEvents('Draw', { | ||
| filter: { _disputeID: event.returnValues._disputeID }, | ||
| fromBlock: 0 | ||
| })).map(d => ({ | ||
| ...notification, | ||
| account: d.returnValues._address, | ||
| key: `${event.blockNumber}-${event.transactionIndex}-${ | ||
| event.logIndex | ||
| }-${d.returnValues._address}` | ||
| })) | ||
| } | ||
| }, | ||
| async Draw(_, klerosLiquid, block, event) { | ||
| const dispute = await klerosLiquid.methods | ||
| .disputes(event.returnValues._disputeID) | ||
| .call() | ||
| if (dispute.period !== '4') { | ||
| const dispute2 = await klerosLiquid.methods | ||
| .getDispute(event.returnValues._disputeID) | ||
| .call() | ||
| if ( | ||
| Number(event.returnValues._appeal) === | ||
| dispute2.votesLengths.length - 1 | ||
| ) | ||
| return [ | ||
| { | ||
| account: event.returnValues._address, | ||
| date: new Date(block.timestamp * 1000), | ||
| key: `${event.blockNumber}-${event.transactionIndex}-${ | ||
| event.logIndex | ||
| }-${event.returnValues._address}`, | ||
| message: `Congratulations! You have been drawn as a juror on case #${ | ||
| event.returnValues._disputeID | ||
| }.`, | ||
| to: `/cases/${event.returnValues._disputeID}`, | ||
| type: 'info' | ||
| } | ||
| ] | ||
| } | ||
| }, | ||
| async TokenAndETHShift(web3, _, block, event) { | ||
| const time = block.timestamp * 1000 | ||
| if (Date.now() - time < 6.048e8) | ||
| return [ | ||
| { | ||
| account: event.returnValues._address, | ||
| date: new Date(time), | ||
| key: `${event.blockNumber}-${event.transactionIndex}-${ | ||
| event.logIndex | ||
| }-${event.returnValues._address}`, | ||
| message: `Case #${ | ||
| event.returnValues._disputeID | ||
| } was executed. ETH: ${Number( | ||
| web3.utils.fromWei(event.returnValues._ETHAmount) | ||
| ).toFixed(4)}, PNK: ${Number( | ||
| web3.utils.fromWei(event.returnValues._tokenAmount) | ||
| ).toFixed(0)}.`, | ||
| to: `/cases/${event.returnValues._disputeID}`, | ||
| type: 'info' | ||
| } | ||
| ] | ||
| } | ||
| } | ||
| export default networkID => { | ||
| const [notifications, setNotifications] = useState() | ||
| const onNotificationClick = useCallback( | ||
| ({ currentTarget: { id } }) => | ||
| setNotifications(notifications => { | ||
| localStorage.setItem(id, true) | ||
| const index = notifications.findIndex(n => n.key === id) | ||
| return [ | ||
| ...notifications.slice(0, index), | ||
| ...notifications.slice(index + 1) | ||
| ] | ||
| }), | ||
| [] | ||
| ) | ||
| useEffect(() => { | ||
| const web3 = new Web3(networkIDData[networkID].provider) | ||
| const klerosLiquid = new web3.eth.Contract( | ||
| KlerosLiquid.abi, | ||
| process.env[ | ||
| `REACT_APP_KLEROS_LIQUID_${networkIDData[networkID].name}_ADDRESS` | ||
| ] | ||
| ) | ||
| let mounted = true | ||
| Promise.all([ | ||
| klerosLiquid.getPastEvents('AppealDecision', { fromBlock: 0 }), | ||
| klerosLiquid.getPastEvents('Draw', { fromBlock: 0 }), | ||
| klerosLiquid.getPastEvents('TokenAndETHShift', { fromBlock: 0 }) | ||
| ]).then(async ([events1, events2, events3]) => { | ||
| const notifications = [] | ||
| for (const event of [...events1, ...events2, ...events3]) { | ||
| let _notifications = await handlers[event.event]( | ||
| web3, | ||
| klerosLiquid, | ||
| await web3.eth.getBlock(event.blockNumber), | ||
| event | ||
| ) | ||
| if (_notifications) { | ||
| _notifications = _notifications.filter( | ||
| n => !localStorage.getItem(n.key) | ||
| ) | ||
| if (_notifications.length !== 0) notifications.push(..._notifications) | ||
| } | ||
| } | ||
| if (mounted) setNotifications(notifications.reverse()) | ||
| }) | ||
| const listener = klerosLiquid.events | ||
| .allEvents({ fromBlock: 0 }) | ||
| .on('data', async event => { | ||
| if (handlers[event.event]) { | ||
| const notifications = handlers[event.event]( | ||
| web3, | ||
| klerosLiquid, | ||
| await web3.eth.getBlock(event.blockNumber), | ||
| event | ||
| ) | ||
| if (notifications && mounted) | ||
| setNotifications(_notifications => [ | ||
| ...notifications.reverse(), | ||
| ..._notifications | ||
| ]) | ||
| } | ||
| }) | ||
| return () => { | ||
| listener.unsubscribe() | ||
| mounted = false | ||
| } | ||
| }, []) | ||
| return { notifications, onNotificationClick } | ||
| } |
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