Introduced fallback contract execution (#388)

examples/nodejs_contract/diagnostic_contract.js

@@ -6,7 +6,7 @@ const filename = "file.dat";
 const autofilePrefix = "autofile";
 const autofileSize = 1 * 1024 * 1024;
 
-const diagnosticContract = async (ctx) => {
+const diagnosticContract = async (ctx, readOnly = false) => {
 
     // Collection of per-user promises to wait for. Each promise completes when inputs for that user is processed.
     const userHandlers = [];
@@ -134,5 +134,16 @@ const diagnosticContract = async (ctx) => {
 
 }
 
+const fallback = async (ctx) => {
+    console.log(`Fallback mode: Non consensus execution count: ${ctx.nonConsensusRounds}`);
+}
+
+
 const hpc = new HotPocket.Contract();
-hpc.init(diagnosticContract);
+hpc.init({
+    "consensus": async (ctx) => { await diagnosticContract(ctx); },
+    "consensus_fallback": async (ctx) => { await fallback(ctx); },
+    "read_req": async (ctx) => { await diagnosticContract(ctx, true); }
+});
+
+

examples/nodejs_contract/echo_contract.js

@@ -5,10 +5,10 @@ const exectsFile = "exects.txt";
 
 // HP smart contract is defined as a function which takes HP ExecutionContext as an argument.
 // HP considers execution as complete, when this function completes and all the NPL message callbacks are complete.
-const echoContract = async (ctx) => {
+const contract = async (ctx, readonly = false) => {
 
     // We just save execution timestamp as an example state file change.
-    if (!ctx.readonly) {
+    if (!readonly) {
         fs.appendFileSync(exectsFile, "ts:" + ctx.timestamp + "\n");
 
         const stats = fs.statSync(exectsFile);
@@ -56,7 +56,7 @@ const echoContract = async (ctx) => {
     // ctx.unl.find("<public key hex>");
 
     // NPL messages example.
-    // if (!ctx.readonly) {
+    // if (!readonly) {
     //     // Start listening to incoming NPL messages before we send ours.
     //     const promise = new Promise((resolve, reject) => {
     //         let timeout = setTimeout(() => {
@@ -84,5 +84,33 @@ const echoContract = async (ctx) => {
     // await ctx.updateConfig(config);
 }
 
+const fallback = async (ctx) => {
+    console.log(`Fallback mode: Non consensus execution count: ${ctx.nonConsensusRounds}`);
+    // NPL messages example.
+    // Start listening to incoming NPL messages before we send ours.
+    const promise = new Promise((resolve, reject) => {
+        let timeout = setTimeout(() => {
+            reject('NPL timeout.');
+        }, 2000);
+
+        let list = [];
+        ctx.unl.onMessage((node, msg) => {
+            console.log(`${node.publicKey} said ${msg} to me.`);
+            list.push(msg);
+            if (list.length == ctx.unl.list().length) {
+                clearTimeout(timeout);
+                resolve();
+            }
+        });
+    });
+
+    await ctx.unl.send("Hello");
+    await promise;
+}
+
 const hpc = new HotPocket.Contract();
-hpc.init(echoContract);
+hpc.init({
+    "consensus": async (ctx) => { await contract(ctx, false); },
+    "consensus_fallback": async (ctx) => { await fallback(ctx); },
+    "read_req": async (ctx) => { await contract(ctx, true); }
+});

examples/nodejs_contract/file_contract.js

@@ -2,7 +2,7 @@ const HotPocket = require("hotpocket-nodejs-contract");
 const fs = require('fs');
 const bson = require('bson');
 
-const fileContract = async (ctx) => {
+const fileContract = async (ctx, readonly = false) => {
 
     for (const user of ctx.users.list()) {
 
@@ -54,7 +54,7 @@ const fileContract = async (ctx) => {
                     }));
                 }
             }
-            else if (msg.type == "download") {
+            else if (readonly && msg.type == "download") {
                 if (fs.existsSync(msg.fileName)) {
                     const fileContent = fs.readFileSync(msg.fileName);
                     await user.send(bson.serialize({
@@ -76,5 +76,14 @@ const fileContract = async (ctx) => {
     }
 };
 
+
+const fallback = async (ctx) => {
+    console.log(`Fallback mode: Non consensus execution count: ${ctx.nonConsensusRounds}`);
+}
+
 const hpc = new HotPocket.Contract();
-hpc.init(fileContract, HotPocket.clientProtocols.bson);
+hpc.init({
+    "consensus": async (ctx) => { await fileContract(ctx); },
+    "consensus_fallback": async (ctx) => { await fallback(ctx); },
+    "read_req": async (ctx) => { await fileContract(ctx, true); }
+}, HotPocket.clientProtocols.bson);

examples/nodejs_contract/package-lock.json

@@ -6,7 +6,7 @@
         "": {
             "dependencies": {
                 "bson": "4.0.4",
-                "hotpocket-nodejs-contract": "0.5.10",
+                "hotpocket-nodejs-contract": "0.7.0",
                 "seedrandom": "3.0.5"
             }
         },
@@ -37,9 +37,9 @@
             }
         },
         "node_modules/hotpocket-nodejs-contract": {
-            "version": "0.5.10",
-            "resolved": "https://registry.npmjs.org/hotpocket-nodejs-contract/-/hotpocket-nodejs-contract-0.5.10.tgz",
-            "integrity": "sha512-1Cw9WcyoQmJabGkjRbM4FZ1HMvUI3z6IVTbhi0BDiD+K1c6bHROPgNKbIHCSL15+Z5xvbHpeuOOPLGogGtdC7Q=="
+            "version": "0.7.0",
+            "resolved": "https://registry.npmjs.org/hotpocket-nodejs-contract/-/hotpocket-nodejs-contract-0.7.0.tgz",
+            "integrity": "sha512-MHIhGGzPBsKkmXMZrr8L3ze6cSqlSKQ+V2J59/fSS7FDeo5+Z983ZOwt1aBvaLmkN22YOvtLVdBUn1EEamryOg=="
         },
         "node_modules/ieee754": {
             "version": "1.1.13",
@@ -82,9 +82,9 @@
             }
         },
         "hotpocket-nodejs-contract": {
-            "version": "0.5.10",
-            "resolved": "https://registry.npmjs.org/hotpocket-nodejs-contract/-/hotpocket-nodejs-contract-0.5.10.tgz",
-            "integrity": "sha512-1Cw9WcyoQmJabGkjRbM4FZ1HMvUI3z6IVTbhi0BDiD+K1c6bHROPgNKbIHCSL15+Z5xvbHpeuOOPLGogGtdC7Q=="
+            "version": "0.7.0",
+            "resolved": "https://registry.npmjs.org/hotpocket-nodejs-contract/-/hotpocket-nodejs-contract-0.7.0.tgz",
+            "integrity": "sha512-MHIhGGzPBsKkmXMZrr8L3ze6cSqlSKQ+V2J59/fSS7FDeo5+Z983ZOwt1aBvaLmkN22YOvtLVdBUn1EEamryOg=="
         },
         "ieee754": {
             "version": "1.1.13",

examples/nodejs_contract/package.json

@@ -5,7 +5,7 @@
         "build-diag": "ncc build diagnostic_contract.js -o dist/diagnostic-contract"
     },
     "dependencies": {
-        "hotpocket-nodejs-contract": "0.5.10",
+        "hotpocket-nodejs-contract": "0.7.0",
         "bson": "4.0.4",
         "seedrandom": "3.0.5"
     }