Create Instance

The JavaScript SDK supports EVM and Substrate transactions. In order to communicate and generate transactions using the peaq blockchain an instance must be created.

createInstance(baseUrl, chainType, seed)

Parameter	Type	EVM	Substrate	Description
baseUrl	`string`	Required	Required	RPC/WSS URL used to connect to the blockchain. Reference Connecting to peaq for supported URLs. Use RPC for EVM and WSS for Substrate (and EVM reads).
chainType	`ChainType`	Required	Optional	Defines whether the instance will generate EVM or Substrate transactions (defaults to Substrate). Accessible via the SDK.
seed	`string`	N/A	Optional	Mnemonic phrase used in Substrate instances to execute write transactions on behalf of the user.

import { Sdk } from "@peaq-network/sdk";

const HTTPS_BASE_URL = "https://quicknode.peaq.xyz";

const sdk = await Sdk.createInstance({
    baseUrl: HTTPS_BASE_URL,
    chainType: Sdk.ChainType.EVM
});

// No direct API connection made to EVM so disconnect is unnecessary.

import { Sdk } from "@peaq-network/sdk";

const WSS_BASE_URL = "wss://quicknode.peaq.xyz";
const SUBSTRATE_SEED = process.env['SUBSTRATE_SEED'];

const sdk = await Sdk.createInstance({
    baseUrl: WSS_BASE_URL,
    chainType: Sdk.ChainType.SUBSTRATE,
    seed: SUBSTRATE_SEED
});

// disconnect when finished
await sdk.disconnect();

Now you will have an sdk object that can be used to execute the DID, RBAC, and Storage operations on the peaq blockchain. The EVM instance only constructs transaction objects, it does not send them. You send the transaction yourself, so no private key passes through the SDK. If you want the SDK to send it for you, use sendEvmTx. The source is on GitHub at peaq-js.

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SDK Reference

Create Instance

createInstance(baseUrl, chainType, seed)

​createInstance(baseUrl, chainType, seed)

createInstance(baseUrl, chainType, seed)