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Simple Polkadot{.js} Script Examples

License: GPL v3 TypeScript

This repository contains examples of how to use the polkadot{.js} API to connect to a node and perform some basic operations.

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Getting started

Pre-requisites:

  • Setup Node.js v18+ (recommended via nvm with nvm install 18)
  • Clone this repository
Special Instructions for Windows Users

[!IMPORTANT]
PowerShell is not supported. Windows users must either use WSL (recommended) or a custom shell like Git Bash.

Pre-requisites when using WSL for Linux:

  • Install WSL and execute all commands in the WSL terminal
  • Setup Node.js v18+ (recommended via nvm with nvm install 18)
  • Install the following npm packages globally:
  • npm i -g npm
  • npm i -g pnpm node-gyp make
  • Clone this repository into the WSL file system (e.g. /home/<user>/).

Tip: You can enter \\wsl$\ in the top bar of the Windows Explorer to access the WSL file system visually.

Install dependencies:

pnpm install
## or
npm install
## or
yarn install

Run a script:

Note

These commands will run a TypeScript script directly using tsx. Alternatively, you can build the TypeScript files and run the JavaScript output using node.

pnpm run script traverse-events-at-block
## or
npm run script traverse-events-at-block
## or
yarn run script traverse-events-at-block

Example Scripts

Note

You can use this repository as a starting point for your own scripts, ignore the examples, and uninstall redundant dependencies.

Macros Description Dependencies
balance Fetches the balance for a given network & address. @polkadot/api
@scio-labs/use-inkathon
@azns/resolver-core
listen-contract-events Listens & decodes ink! contract events. @polkadot/api
@polkadot/api-contract
traverse-events-at-block Traverses all events at a specific block. @polkadot/api

About

The project is part of a Scio Labs initiative to improve the developer experience in the ink! ecosystem. Other projects include: