Unable to initialize the API: You need to pass a valid Metadata instance to Decorated

[heipacker]

// Required imports const {ApiPromise, WsProvider} = require('@polkadot/api');

async function main() { // Initialise the provider to connect to the local node const provider = new WsProvider('wss://wspolkadot.mytokenpocket.vip');

// Create the API and wait until ready
const api = await ApiPromise.create({provider});

// Retrieve the chain & node information information via rpc calls
const [chain, nodeName, nodeVersion] = await Promise.all([
    api.rpc.system.chain(),
    api.rpc.system.name(),
    api.rpc.system.version()
]);

console.log(`You are connected to chain ${chain} using ${nodeName} v${nodeVersion}`);

}

main().catch(console.error).finally(() => process.exit());

v2.7.1 or v2.8.1

[jacogr]

Honestly, no idea - the same URL works correctly via the apps UI. Can you please share your package.json?

So this error You need to pass a valid Metadata instance to Decorated would point to a @polkadot/types not matching with the @polkadot/api (The versions need to align between the two)

[heipacker]

{ "name": "server", "version": "0.0.1", "private": true, "scripts": { "start": "node ./bin/www" }, "dependencies": { "@babel/runtime": "^7.10.2", "@digicat/ethereum-contract-watcher": "^1.0.0", "@polkadot/api": "^2.7.1", "async": "^2.1.4", "axios": "^0.19.0", "base64-arraybuffer": "^0.1.5", "bluebird": "^3.4.6", "body-parser": "^1.19.0", "config": "^1.24.0", "connect-redis": "^3.2.0", "cookie-parser": "^1.4.4", "cookie-session": "^1.3.3", "debug": "~0.7.4", "express": "^4.17.1", "express-cluster": "0.0.4", "express-domain-middleware": "^0.1.0", "express-ipv4": "0.0.1", "express-session": "^1.14.2", "express-ws": "^2.0.0", "express-xml-bodyparser": "^0.3.0", "log4js": "^1.0.1", "md5": "^2.2.1", "moment": "^2.18.1", "moment-timezone": "^0.5.10", "morgan": "^1.9.1", "multer": "^1.2.0", "node-cache": "^4.1.0", "node-schedule": "^1.2.0", "node-summary": "^1.1.0", "nodemailer": "^3.1.8", "querystring": "^0.2.0", "redis-clustr": "^1.5.2", "request": "^2.79.0", "sha1": "^1.1.1", "static-favicon": "~1.0.0", "string": "^3.3.3", "stringformat": "0.0.5", "xml": "^1.0.1", "xml2js": "^0.4.17", "xss": "^0.3.3" } }

[heipacker]

same error when change to "@polkadot/api": "^2.8.1",

[jacogr]

No explicit installs of @polkadot/types. What does npm list @polkadot/types yield?

[heipacker]

└─┬ @polkadot/api@2.8.1 ├─┬ @polkadot/api-derive@2.8.1 │ └── @polkadot/types@2.8.1 deduped ├─┬ @polkadot/metadata@2.8.1 │ ├── @polkadot/types@2.8.1 deduped │ └─┬ @polkadot/types-known@2.8.1 │ └── @polkadot/types@2.8.1 deduped ├─┬ @polkadot/rpc-core@2.8.1 │ └── @polkadot/types@2.8.1 deduped ├─┬ @polkadot/rpc-provider@2.8.1 │ └── @polkadot/types@2.8.1 deduped ├─┬ @polkadot/types@2.8.1 │ └─┬ @polkadot/metadata@2.8.1 │ ├── @polkadot/types@2.8.1 deduped │ └─┬ @polkadot/types-known@2.8.1 │ └── @polkadot/types@2.8.1 deduped └─┬ @polkadot/types-known@2.8.1 └── @polkadot/types@2.8.1 deduped

[heipacker]

It doesn't look unusual

[jacogr]

At a loss what is wrong there. My next step would be to remove node_modules and try, something is very weird with the installed deps there.

This is what I just did:

1. init a simple clean package

$ mkdir -p npm-test
$ cd npm-test 
$ npm init
This utility will walk you through creating a package.json file.
It only covers the most common items, and tries to guess sensible defaults.

See `npm help json` for definitive documentation on these fields
and exactly what they do.

Use `npm install <pkg>` afterwards to install a package and
save it as a dependency in the package.json file.

Press ^C at any time to quit.
package name: (npm-test) 
version: (1.0.0) 
description: 
entry point: (index.js) 
test command: 
git repository: 
keywords: 
author: 
license: (ISC) 
About to write to test/npm-test/package.json:

{
  "name": "npm-test",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "author": "",
  "license": "ISC"
}

Is this OK? (yes) 

2. add @polkadot/api (2.8.1 as per above)

$ npm add @polkadot/api@2.8.1

> bufferutil@4.0.2 install /Users/jaco/Projects/polkadot-js/test/npm-test/node_modules/bufferutil
> node-gyp-build

> utf-8-validate@5.0.3 install /Users/jaco/Projects/polkadot-js/test/npm-test/node_modules/utf-8-validate
> node-gyp-build

npm notice created a lockfile as package-lock.json. You should commit this file.
npm WARN npm-test@1.0.0 No description
npm WARN npm-test@1.0.0 No repository field.

+ @polkadot/api@2.8.1
added 84 packages from 104 contributors and audited 84 packages in 30.22s

1 package is looking for funding
  run `npm fund` for details

found 0 vulnerabilities

3. created index.js with the exact contents above

$ node ./index.js 
You are connected to chain Polkadot using Parity Polkadot v0.8.26-1-803da90f7-x86_64-linux-gnu

[heipacker]

delete this deps "@digicat/ethereum-contract-watcher": "^1.0.0"

ok now

[polkadot-js-bot]

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