generates a Plasm public address with the given ECDSA public key

generatePlmAddress.ts

/**
 * generates a Plasm public address with the given ethereum public key
 * @param ethPubKey an compressed ECDSA public key. With or without the 0x prefix
 */
export function generatePlmAddress(publicKey: string) {
    // converts a given hex string into Uint8Array
    const toByteArray = (hexString: string) => {
        const result = [];
        for (let i = 0; i < hexString.length; i += 2) {
            result.push(parseInt(hexString.substr(i, 2), 16));
        }
        return new Uint8Array(result);
    };

    // hash to blake2
    const plasmPubKey = polkadotUtilCrypto.blake2AsU8a(toByteArray(publicKey.replace('0x', '')), 256);
    // encode address
    const plasmAddress = polkadotUtilCrypto.encodeAddress(plasmPubKey, 5);
    return plasmAddress;
}