es2020 target in tsc to allow bigint literal

cli/cli.js

@@ -80,7 +80,7 @@ async function build(argv) {
 
 async function checkTsBuildWithTsc(sourceFileWithPath) {
     console.log(`check TypeScript build of ${sourceFileWithPath} with tsc`)
-    await executeCommand(`${TSC} --noEmit --experimentalDecorators --target es5 ${sourceFileWithPath}`);
+    await executeCommand(`${TSC} --noEmit --experimentalDecorators --target es2020 --moduleResolution node ${sourceFileWithPath}`);
 }
 
 // Common build function

examples/tsconfig.json

@@ -1,7 +1,7 @@
 {
     "compilerOptions": {
         "experimentalDecorators": true,
-        "target": "es5",
+        "target": "es2020",
         "noEmit": true
     },
     "exclude": [

tests/__tests__/typescript.ava.js

@@ -0,0 +1,37 @@
+import { Worker } from 'near-workspaces';
+import test from 'ava';
+
+
+test.before(async t => {
+    // Init the worker and start a Sandbox server
+    const worker = await Worker.init();
+
+    // Prepare sandbox for tests, create accounts, deploy contracts, etx.
+    const root = worker.rootAccount;
+
+    // Deploy the test contract.
+    const typescriptContract = await root.devDeploy(
+        'build/typescript.wasm',
+    );
+    await typescriptContract.call(typescriptContract, 'init', {})
+
+    // Test users
+    const ali = await root.createSubAccount('ali');
+
+    // Save state for test runs
+    t.context.worker = worker;
+    t.context.accounts = { root, typescriptContract, ali };
+});
+
+test.after(async t => {
+    await t.context.worker.tearDown().catch(error => {
+        console.log('Failed to tear down the worker:', error);
+    });
+});
+
+
+test('bigint', async t => {
+    const { typescriptContract } = t.context.accounts;
+    let r = await typescriptContract.view('bigint', '');
+    t.is(r, "3");
+});

tests/package.json

@@ -6,7 +6,7 @@
     "type": "module",
     "scripts": {
         "postinstall": "cd .. && yarn link && cd tests && yarn link near-sdk-js",
-        "build": "yarn build:context-api && yarn build:math-api && yarn build:storage-api && yarn build:log-panic-api && yarn build:promise-api && yarn build:promise-batch-api && yarn build:function-params && yarn build:lookup-map && yarn build:lookup-set && yarn build:unordered-map && yarn build:unordered-set && yarn build:vector && yarn build:bytes",
+        "build": "yarn build:context-api && yarn build:math-api && yarn build:storage-api && yarn build:log-panic-api && yarn build:promise-api && yarn build:promise-batch-api && yarn build:function-params && yarn build:lookup-map && yarn build:lookup-set && yarn build:unordered-map && yarn build:unordered-set && yarn build:vector && yarn build:bytes && yarn build:typescript",
         "build:context-api": "near-sdk-js build src/context_api.js build/context_api.wasm",
         "build:math-api": "near-sdk-js build src/math_api.js build/math_api.wasm",
         "build:storage-api": "near-sdk-js build src/storage_api.js build/storage_api.wasm",
@@ -20,6 +20,7 @@
         "build:unordered-set": "near-sdk-js build src/unordered-set.js build/unordered-set.wasm",
         "build:vector": "near-sdk-js build src/vector.js build/vector.wasm",
         "build:bytes": "near-sdk-js build src/bytes.js build/bytes.wasm",
+        "build:typescript": "near-sdk-js build src/typescript.ts build/typescript.wasm",
         "test": "ava",
         "test:context-api": "ava __tests__/test_context_api.ava.js",
         "test:math-api": "ava __tests__/test_math_api.ava.js",
@@ -32,12 +33,14 @@
         "test:unordered-set": "ava __tests__/unordered-set.ava.js",
         "test:unordered-map": "ava __tests__/unordered-map.ava.js",
         "test:vector": "ava __tests__/vector.ava.js",
-        "test:bytes": "ava __tests__/bytes.ava.js"
+        "test:bytes": "ava __tests__/bytes.ava.js",
+        "test:typescript": "ava __tests__/typescript.ava.js"
     },
     "author": "Near Inc <[email protected]>",
     "license": "Apache-2.0",
     "devDependencies": {
         "ava": "^4.2.0",
-        "near-workspaces": "3.1.0"
+        "near-workspaces": "3.1.0",
+        "typescript": "^4.7.4"
     }
 }

tests/src/typescript.ts

@@ -0,0 +1,18 @@
+import {
+    NearContract,
+    NearBindgen,
+    view,
+} from 'near-sdk-js'
+
+@NearBindgen
+class TypeScriptTestContract extends NearContract {
+    @view
+    bigint() {
+        // JSON.stringify cannot seriaize a BigInt, need manually toString
+        return (1n + 2n).toString()
+    }
+
+    default() {
+        return new TypeScriptTestContract()
+    }
+}

tests/tsconfig.json

@@ -0,0 +1,10 @@
+{
+    "compilerOptions": {
+        "experimentalDecorators": true,
+        "target": "es2020",
+        "noEmit": true
+    },
+    "exclude": [
+        "node_modules"
+    ],
+}