How to Integrate with the Polkadot Blockchain with Magic
How to Integrate with the Polkadot Blockchain with Magic
#Installation
Magic interacts with the Polkadot blockchain via Magic's extension NPM package @magic-ext/polkadot. The Polkadot extension also lets you interact with the blockchain using methods from polkadot-js.
note
You can skip straight to our kitchen sink example directly:
👉 Polkadot Example
#NPM
npm install --save @magic-ext/polkadot
#Yarn
yarn add @magic-ext/polkadot
#Initializing Extension
#ES Modules/TypeScript
import { Magic } from 'magic-sdk';
import { PolkadotExtension } from '@magic-ext/polkadot';
const magic = new Magic('YOUR_API_KEY', {
extensions: [
new PolkadotExtension({
rpcUrl: 'polkadot rpc url',
}),
],
});
#Get User Info
#Get Account
Using getAccount function to get Polkadot public address for current user.
#ES Modules/TypeScript
import { Magic } from 'magic-sdk';
import { PolkadotExtension } from '@magic-ext/polkadot';
const magic = new Magic('YOUR_API_KEY', {
extensions: [
new PolkadotExtension({
rpcUrl: 'polkadot rpc url',
}),
],
});
// Get user's Polkadot public addressconst publicAddress = await magic.polkadot.getAccount();
console.log('Polkadot Public Address: ', publicAddress);
#Send Transaction
To send a standard Polkadot blockchain transaction, you can call the magic.polkadot.sendTransaction method.
#ES Modules/TypeScript
import { Magic } from 'magic-sdk';
import { PolkadotExtension } from '@magic-ext/polkadot';
const magic = new Magic('YOUR_API_KEY', {
extensions: [
new PolkadotExtension({
rpcUrl: 'polkadot rpc url',
}),
],
});
const tx = await magic.polkadot.sendTransaction(
// to address
'5H3pELHbg9skXE2HfLqP23UPgrgu2Juj55CH6sdDGWc2HKNs',
1000000000000000, // amount
);
console.log('transaction hash', tx);
#Smart Contract
#Deploy ink contract on substrate
Please follow substrate documention to create and deploy contract on substrate.
#Call Extension Method
To call a Polkadot blockchain contract as transaction, you can call the magic.polkadot.contractCall method.
#ES Modules/TypeScript
import { Magic } from 'magic-sdk';
import { PolkadotExtension } from '@magic-ext/polkadot';
const magic = new Magic('YOUR_API_KEY', {
extensions: [
new PolkadotExtension({
rpcUrl: 'polkadot rpc url',
}),
],
});
const api = await ApiPromise.create({
provider: new WsProvider('polkadot rpc url'),
});
await api.isReady;
const abi = new Abi(api.registry, contractABI);
const data = abi.messages.flip();
const tx = await magic.polkadot.contractCall(
// contract address
'5C52CfgkwANdFuN3VgPSprQwNWKfkLWMHJbMRzp12h4YarCa',
0, // value
1000000, // max gas
data, // contract data
);
console.log('transaction hash', tx);
