Setup Steps

Snowbridge V2 setup steps.

Each Snowbridge integration requires certain environment variables to be set up.

This step prepares all required state and dependencies for the transfer operation. This includes loading the asset registry, initializing the context, which sets up the connections to Ethereum and Substrate-based networks and loading the user wallets for both Ethereum and Substrate chains.

// Initialize polkadot-js 
crypto await cryptoWaitReady()
// Get the registry of parachains and assets.
const environment = "polkadot_mainnet"
const registry = assetRegistryFor(environment)
// Initialize the context which establishes and pool connections
const context = new Context(contextConfigFor(environment))

// Initialize ethereum wallet.
const ETHEREUM_ACCOUNT = new Wallet(
    process.env.ETHEREUM_KEY ?? "Your Key Goes Here",
    context.ethereum()
)
const ETHEREUM_ACCOUNT_PUBLIC = await ETHEREUM_ACCOUNT.getAddress()

// Initialize substrate wallet.
const polkadot_keyring = new Keyring({ type: "sr25519" })
const POLKADOT_ACCOUNT = polkadot_keyring.addFromUri(
    process.env.SUBSTRATE_KEY ?? "Your Key Goes Here"
)
const POLKADOT_ACCOUNT_PUBLIC = POLKADOT_ACCOUNT.address

// Set your relayer reward, in Ether. This should cost the extrinsic 
// fee to BridgeHub and XCM delivery fee to AssetHub.
const relayerFee = 100_000_000_000_000n