SPL Type Length Value Library
npm install @solana/spl-type-length-valueLibrary with utilities for working with Type-Length-Value structures in js.
``ts
import { TlvState, SplDiscriminator } from '@solana/spl-type-length-value';
const tlv = new TlvState(tlvData, discriminatorSize, lengthSize);
const discriminator = await splDiscriminate("
const firstValue = tlv.firstBytes(discriminator);
const allValues = tlv.bytesRepeating(discriminator);
const firstThreeValues = tlv.bytesRepeating(discriminator, 3);
``