✨ push: notify subscribers with fixed debt

actions/onNotifyDebtors.ts

@@ -0,0 +1,248 @@
+import { StaticJsonRpcProvider } from '@ethersproject/providers';
+import { ActionFn, Network, PeriodicEvent } from '@tenderly/actions';
+import { channels, payloads } from '@pushprotocol/restapi';
+import { formatUnits } from '@ethersproject/units';
+import { BigNumber } from '@ethersproject/bignumber';
+import { Wallet } from '@ethersproject/wallet';
+import { WebClient } from '@slack/web-api';
+import { Interface } from '@ethersproject/abi';
+import getSecret from './utils/getSecret';
+import multicall from './utils/multicall';
+
+import type { Previewer, PreviewerInterface } from './types/Previewer';
+import previewerABI from './abi/Previewer.json';
+
+export const DELAY_KEY = 'notificationsDelay';
+export const NOTIFICATIONS_KEY = 'notificationsResults';
+
+const NETWORKS = {
+  // TODO: uncomment when push ready on mainnet
+  // 1: {
+  //   channel: '0x',
+  //   env: 'prod',
+  //   app: 'app',
+  // },
+  5: {
+    channel: '0xB51210b372D50c290BA36bD464F903eDe8939A1B',
+    env: 'staging',
+    app: 'goerli',
+  },
+};
+
+export type SentNotification = {
+  totalDebt: string;
+  chainId: number;
+  error?: unknown;
+  maturityISO: string;
+  subscriber: string;
+  successfullySent: boolean;
+  symbol: string;
+};
+
+enum NotificationType {
+  broadcast = 1,
+  target = 3,
+  subset = 4,
+}
+
+const titleMsg = (daysLeft: number, symbol: string) => {
+  if (daysLeft > 1) {
+    return `Your ${symbol} fixed borrow expires in ${daysLeft} days`;
+  }
+  if (daysLeft === 1) return `Your ${symbol} fixed borrow expires tomorrow`;
+  if (daysLeft === 0) return `Your ${symbol} fixed borrow expires today`;
+  if (daysLeft === -1) return `Your ${symbol} fixed borrow expired yesterday`;
+  return `Your ${symbol} fixed borrow expired ${-daysLeft} days ago`;
+};
+
+const bodyIntro = (daysLeft: number, decimals: number, principal: BigNumber, symbol: string) => {
+  const yourBorrow = `Your ${formatUnits(principal, decimals)} ${symbol} fixed borrow`;
+
+  if (daysLeft > 1) {
+    return `${yourBorrow} expires in ${daysLeft} days`;
+  }
+  if (daysLeft === 1) return `${yourBorrow} expires tomorrow`;
+  if (daysLeft === 0) return `${yourBorrow} expires today`;
+  if (daysLeft === -1) return `${yourBorrow} expired yesterday`;
+  return `${yourBorrow} expired ${-daysLeft} days ago`;
+};
+
+const bodyMsg = (
+  daysLeft: number,
+  decimals: number,
+  principal: BigNumber,
+  symbol: string,
+  totalDebt: string,
+  penaltyRate: BigNumber,
+) => {
+  const intro = bodyIntro(daysLeft, decimals, principal, symbol);
+  const debtOf = `debt of ${totalDebt} ${symbol}`;
+  const thePenalty = `The penalty for not repaying on time is ${Number(formatUnits(penaltyRate.mul(8_640_000), 18)).toFixed(2)}% per day.`;
+
+  if (daysLeft >= 0) {
+    return `${intro}. Please, remember to repay your ${debtOf} on time. ${thePenalty}`;
+  }
+  return `${intro}. Please, repay your ${debtOf} ASAP. ${thePenalty}`;
+};
+
+const previewer = new Interface(previewerABI) as PreviewerInterface;
+
+export default (async ({ storage, secrets, gateways }, { time }: PeriodicEvent) => {
+  try {
+    const delay = (await storage.getNumber(DELAY_KEY)) ?? 60 * 60 * 24;
+    const now = Math.floor(time.getTime() / 1_000);
+
+    const results = await Promise.all(
+      Object.entries(NETWORKS).map(async ([chainId, { channel, env, app }]) => {
+        const signer = new Wallet(`0x${await secrets.get(`PUSH_CHANNEL_PK@${chainId}`)}`);
+        const network = { 5: Network.GOERLI }[chainId] ?? Network.MAINNET;
+        const provider = new StaticJsonRpcProvider(gateways.getGateway(network));
+
+        // eslint-disable-next-line no-underscore-dangle
+        const subscribers = await (channels._getSubscribers({ channel, env }) as Promise<string[]>)
+          .catch((e) => {
+            const msg = `Error getting subscribers for chainId ${chainId}`;
+            console.error(msg, e);
+            throw new Error(msg);
+          });
+
+        const previewerAddress = (await import(`@exactly-protocol/protocol/deployments/${network}/Previewer.json`)) as ({ address: string });
+        const [, exactlyData] = await multicall.connect(provider).callStatic.aggregate(
+          subscribers.map((account) => ({
+            target: previewerAddress.address,
+            callData: previewer.encodeFunctionData('exactly', [account]),
+          })),
+        );
+
+        const chainResult = await Promise.all(
+          subscribers.map((subscriber: string, index) => {
+            const [exactly] = previewer.decodeFunctionResult('exactly', exactlyData[index]) as [Previewer.MarketAccountStructOutput[]];
+            return exactly.map(({
+              assetSymbol: symbol, decimals, penaltyRate, fixedBorrowPositions,
+            }) => fixedBorrowPositions.map(
+              async ({ maturity, position: { principal }, previewValue }) => {
+                if (previewValue.isZero() || Number(maturity) - now > delay) return null;
+                const days = Math.floor((Number(maturity) - now) / 86_400);
+                const title = titleMsg(days, symbol);
+                const totalDebt = formatUnits(previewValue, decimals);
+
+                const body = bodyMsg(days, decimals, principal, symbol, totalDebt, penaltyRate);
+                const maturityISO = new Date(Number(maturity) * 1_000).toISOString().slice(0, 10);
+                try {
+                  const response = await payloads.sendNotification({
+                    channel,
+                    env,
+                    signer,
+                    type: NotificationType.target,
+                    recipients: subscriber,
+                    notification: { title, body },
+                    payload: {
+                      title, body, cta: `https://${app}.exact.ly/dashboard`, img: '', // TODO: exa asset img?
+                    },
+                    identityType: 0, // minimal payload
+                  });
+                  return {
+                    symbol,
+                    maturityISO,
+                    subscriber,
+                    successfullySent: response?.status === 204,
+                    totalDebt: formatUnits(previewValue, decimals),
+                    chainId: Number(chainId),
+                  };
+                } catch (error) {
+                  return {
+                    symbol,
+                    maturityISO,
+                    subscriber,
+                    successfullySent: false,
+                    error,
+                    totalDebt: formatUnits(previewValue, decimals),
+                    chainId: Number(chainId),
+                  };
+                }
+              },
+            )).flat();
+          }).flat(),
+        ) as SentNotification[];
+
+        const [slack, monitoring, receipts] = await Promise.all([
+          getSecret(secrets, 'SLACK_TOKEN').then((token) => new WebClient(token)),
+          getSecret(secrets, `SLACK_MONITORING@${chainId}`),
+          getSecret(secrets, `SLACK_RECEIPTS@${chainId}`),
+        ]);
+
+        if (!receipts) console.error(`No slack receipts channel found for chainId ${chainId}`);
+        else {
+          const sent = chainResult.filter(({ successfullySent }) => successfullySent);
+          await slack.chat.postMessage({
+            channel: receipts,
+            attachments: [
+              {
+                color: 'good',
+                title: `Sent ${sent.length} notifications successfully for ${network} network.`,
+                fields: sent.flatMap(
+                  ({
+                    symbol, maturityISO, subscriber, totalDebt,
+                  }) => [
+                    { title: 'symbol', value: symbol, short: true },
+                    { title: 'maturity', value: maturityISO, short: true },
+                    { title: 'total debt', value: totalDebt },
+                    { title: 'account', value: subscriber },
+                  ],
+                ),
+                footer: network,
+                ts: now.toString(),
+              },
+            ],
+          });
+        }
+
+        if (!monitoring) {
+          console.error(`No slack monitoring channel found for chainId ${chainId}`);
+          return chainResult;
+        }
+        const failed = chainResult.filter(({ successfullySent }) => !successfullySent);
+        if (failed.length) {
+          await slack.chat.postMessage({
+            channel: monitoring,
+            attachments: [
+              {
+                color: 'danger',
+                title: `${failed.length} notifications failed for chain ${chainId} subscribers.`,
+                fields: failed.flatMap(
+                  ({
+                    symbol, maturityISO, subscriber, error, totalDebt,
+                  }) => [
+                    { short: true, title: 'symbol', value: symbol },
+                    { short: true, title: 'maturity', value: maturityISO },
+                    { short: true, title: 'total debt', value: totalDebt },
+                    {
+                      short: true,
+                      title: 'error',
+                      value: error instanceof Error ? error?.message : 'Unknown error.',
+                    },
+                    { title: 'account', value: subscriber },
+                  ],
+                ),
+                footer: network,
+                ts: now.toString(),
+              },
+            ],
+          });
+        }
+        return chainResult;
+      }),
+    );
+
+    console.log('***********************************');
+    console.log('Sent notifications: ');
+    console.table(results.flat(2));
+    await storage.putJson(NOTIFICATIONS_KEY, {
+      lastRun: now,
+      notifications: results.flat(2),
+    });
+    console.log('***********************************');
+  } catch (error) {
+    console.error(error);
+  }
+}) as ActionFn;