mirror of https://github.com/certusone/oyster.git
Split reader and writer logic up
This commit is contained in:
Thomas Lisankie
parent
9258da9096
commit
efedb30fff
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@ -2,7 +2,7 @@
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"name": "rpc-cache-server",
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"version": "0.0.1",
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"description": "A server to cache results of (expensive) RPC requests made to the Solana JSON RPC API",
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"main": "src/index.js",
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"main": "src/reader.js",
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"author": "Thomas Lisankie (Monadical)",
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"license": "MIT",
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"private": false,
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@ -1,47 +0,0 @@
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const { JSONRPCServer } = require("json-rpc-2.0");
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const express = require("express");
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const bodyParser = require("body-parser");
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const redis = require("redis");
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const crypto = require("crypto");
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const server = new JSONRPCServer();
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const redisClient = redis.createClient();
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const getProgramAccounts = function({ wormholeID })
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{
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return new Promise((resolve, reject) => {
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redisClient.get(wormholeID, function(err, reply) {
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if (err) {
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reject(err);
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} else {
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if (reply === null) {
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let uuid = crypto.randomUUID();
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redisClient.set(wormholeID, uuid, redis.print);
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resolve(uuid);
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return;
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}
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resolve(reply);
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}
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});
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});
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};
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server.addMethod("getProgramAccounts", getProgramAccounts);
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const app = express();
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app.use(bodyParser.json());
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app.post("/json-rpc", (req, res) => {
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const jsonRPCRequest = req.body;
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// server.receive takes a JSON-RPC request and returns a Promise of a JSON-RPC response.
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console.log("received request");
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console.log(jsonRPCRequest);
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server.receive(jsonRPCRequest).then((jsonRPCResponse) => {
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if (jsonRPCResponse) {
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res.json(jsonRPCResponse);
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} else {
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console.log("no response");
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res.sendStatus(204);
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}
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});
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});
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app.listen(80);
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@ -0,0 +1,78 @@
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const { JSONRPCServer } = require("json-rpc-2.0");
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const express = require("express");
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const bodyParser = require("body-parser");
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const redis = require("redis");
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const crypto = require("crypto");
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const axios = require("axios");
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const server = new JSONRPCServer();
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const redisClient = redis.createClient();
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const getProgramAccounts = function({ wormholeID })
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{
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return new Promise((resolve, reject) => {
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redisClient.get(wormholeID, function(err, reply) {
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if (err) {
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reject(err);
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} else {
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if (reply === null) { // if cache miss
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let uuid = crypto.randomUUID();
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redisClient.set(wormholeID, uuid, redis.print);
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// What it needs to do:
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// 1. Notify the writer
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axios({
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method : "post",
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url : "http://localhost:3001/",
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data : {identifier : wormholeID}
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});
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// 2. Send an RPC request to the full node on behalf of the client
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const client = new JSONRPCClient((jsonRPCRequest) =>
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axios({
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method: "post",
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url: "http://127.0.0.1:8899", // localnet url
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headers: {
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"content-type": "application/json",
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},
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data: jsonRPCRequest,
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}).then((response) => {
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if (response.status === 200) {
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// Use client.receive when you received a JSON-RPC response.
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return client.receive(response.data);
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} else if (jsonRPCRequest.id !== undefined) {
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return Promise.reject(new Error(response.statusText));
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}
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})
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);
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var val = null;
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client
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.request("getProgramAccounts", { wormholeID: wormholeID })
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.then((result) => val = result);
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resolve(val);
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return;
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}
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resolve(reply);
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}
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});
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});
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};
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server.addMethod("getProgramAccounts", getProgramAccounts);
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const app = express();
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app.use(bodyParser.json());
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app.post("/json-rpc", (req, res) => {
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const jsonRPCRequest = req.body;
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// server.receive takes a JSON-RPC request and returns a Promise of a JSON-RPC response.
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console.log("received request");
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console.log(jsonRPCRequest);
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server.receive(jsonRPCRequest).then((jsonRPCResponse) => {
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if (jsonRPCResponse) {
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res.json(jsonRPCResponse);
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} else {
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console.log("no response");
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res.sendStatus(204);
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}
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});
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});
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app.listen(3000);
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@ -0,0 +1,36 @@
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const { JSONRPCClient } = require("json-rpc-2.0");
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const express = require("express");
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const bodyParser = require("body-parser");
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const redis = require("redis");
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redisClient = redis.createClient();
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const app = express();
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app.use(bodyParser.json());
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app.post("/", (req, res) => {
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// when this is called, it means a cache miss happened and the cache needs to be written to.
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// to do this, make an RPC call to the full node and write the value to cache.
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const client = new JSONRPCClient((jsonRPCRequest) =>
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axios({
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method: "post",
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url: "http://127.0.0.1:8899", // localnet url
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headers: {
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"content-type": "application/json",
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},
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data: jsonRPCRequest,
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}).then((response) => {
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if (response.status === 200) {
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// Use client.receive when you received a JSON-RPC response.
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return client.receive(response.data);
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} else if (jsonRPCRequest.id !== undefined) {
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return Promise.reject(new Error(response.statusText));
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}
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})
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);
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client.request("getProgramAccounts", {wormholdID: req.body.wormholeID})
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.then((result) => redis.set(req.body.wormholeID, result));
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// also going to want some cache eviction logic
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});
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app.listen(3001);
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