[WIP] p2w-relay-iface: Add NPM package with relayer interface PoC

commit-id:efcb9b34

third_party/pyth/p2w-relay-iface/.gitignore

@@ -0,0 +1,33 @@
+# See https://help.github.com/articles/ignoring-files/ for more about ignoring files.
+
+# dependencies
+/node_modules
+/.pnp
+.pnp.js
+
+# testing
+/coverage
+
+# production
+/build
+
+# misc
+.DS_Store
+.env.local
+.env.development.local
+.env.test.local
+.env.production.local
+
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+
+# ethereum contracts
+/contracts
+/src/*-contracts/
+
+# tsproto output
+/src/proto
+
+# build
+/lib

third_party/pyth/p2w-relay-iface/package-lock.json

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third_party/pyth/p2w-relay-iface/package.json

@@ -0,0 +1,27 @@
+{
+  "name": "p2w-relay-iface",
+  "version": "1.0.0",
+  "description": "Helper types for generic pyth2wormhole relay transaction-running logic",
+  "private": true,
+  "types": "lib/index.d.ts",
+  "main": "lib/index.js",
+  "scripts": {
+    "build-lib": "npm run copy-artifacts && tsc",
+    "build-watch": "npm run copy-artifacts && tsc --watch",
+    "copy-artifacts": "node scripts/copyTypes.cjs"
+  },
+  "author": "Pyth Network Contributors",
+  "license": "ISC",
+  "devDependencies": {
+    "@openzeppelin/contracts": "^4.2.0",
+    "@typechain/ethers-v5": "^7.1.2",
+    "@types/long": "^4.0.1",
+    "@types/node": "^16.6.1",
+    "copy-dir": "^1.3.0",
+    "find": "^0.3.0",
+    "prettier": "^2.3.2",
+    "tslint": "^6.1.3",
+    "tslint-config-prettier": "^1.18.0",
+    "typescript": "^4.3.5"
+  }
+}

third_party/pyth/p2w-relay-iface/scripts/copyTypes.cjs

@@ -0,0 +1,17 @@
+const find = require("find");
+const fs = require("fs");
+const path = require("path");
+
+const SOURCE_ROOT = "src";
+const TARGET_ROOT = "lib";
+
+find.eachfile(/\.d\.ts(\..*)?/, SOURCE_ROOT, fname => {
+
+    fname_copy = fname.replace(SOURCE_ROOT, TARGET_ROOT);
+
+    console.log("copying types:", fname, "to", fname_copy);
+
+    fs.mkdirSync(path.dirname(fname_copy), {recursive: true});
+
+    fs.copyFileSync(fname, fname_copy);
+});

third_party/pyth/p2w-relay-iface/src/index.ts

@@ -0,0 +1,38 @@
+/// Represents a target chain client config.
+export interface RelayConfig {
+    // Helps pick an appropriate relay() call frequency
+    blockTimeMs: number;
+    // Helps establish target chain's expected relay() error allowance
+    retryCount: number;
+}
+
+/// Represents a target chain relay client generically.
+export interface Relay<RelayConfig> {
+    /// Contains all configurable values specific to this target chain
+    config: RelayConfig;
+    /// Relay a payload to this chain
+    relay(payload: string): Promise<any>;
+    /// Query a price on this chain
+    query(priceId: string): Promise<any>;
+}
+
+
+// Example implementation
+
+class ChACfg implements RelayConfig {
+    blockTimeMs: number = Number(process.env.CHAIN_A_BLOCK_TIME_MS) || 15;
+    retryCount: number = Number(process.env.CHAIN_A_RETRY_COUNT) || 5;
+}
+
+class ChainA implements Relay<ChACfg> {
+    config: ChACfg;
+    async relay(payload: string): Promise<any> {
+	await (async () => {});
+    }
+    async query(priceId: string): Promise<any> {
+    }
+
+    constructor(c: ChACfg) {
+	this.config = c;
+    }
+}

third_party/pyth/p2w-relay-iface/tsconfig.json

@@ -0,0 +1,17 @@
+{
+    "compilerOptions": {
+	"target": "esnext",
+	"module": "esnext",
+	"moduleResolution": "node",
+	"declaration": true,
+	"outDir": "./lib",
+	"strict": true,
+	"skipLibCheck": true,
+	"esModuleInterop": true,
+	"downlevelIteration": true,
+	"allowJs": true,
+    },
+    "types": [],
+    "include": ["src", "types"],
+    "exclude": ["node_modules", "**/__tests__/*"]
+}

third_party/pyth/p2w-relay-iface/tslint.json

@@ -0,0 +1,9 @@
+
+{
+  "extends": ["tslint:recommended", "tslint-config-prettier"],
+  "linterOptions": {
+    "exclude": [
+      "src/proto/**"
+    ]
+  }
+}