# Flexible Transcript Flexible Transcript is a crate offering: - `Transcript`, a trait offering functions transcripts should implement. - `DigestTranscript`, a competent transcript format instantiated against a provided hash function. - `MerlinTranscript`, a wrapper of `merlin` into the trait (available via the `merlin` feature). - `RecommendedTranscript`, a transcript recommended for usage in applications. Currently, this is `DigestTranscript` (available via the `recommended` feature). The trait was created while working on an IETF draft which defined an incredibly simple transcript format. Extensions of the protocol would quickly require a more competent format, yet implementing the one specified was mandatory to meet the specification. Accordingly, the library implementing the draft defined an `IetfTranscript`, dropping labels and not allowing successive challenges, yet thanks to the trait, allowed protocols building on top to provide their own transcript format as needed. `DigestTranscript` takes in any hash function implementing `Digest`, offering a secure transcript format around it. All items are prefixed by a flag, denoting their type, and their length. `MerlinTranscript` was used to justify the API, and if any issues existed with `DigestTranscript`, enable a fallback. It was also meant as a way to be compatible with existing Rust projects using `merlin`. This library was [audited by Cypher Stack in March 2023](https://github.com/serai-dex/serai/raw/74924095e1a0f266b58181b539d9e74fa35dc37a/audits/Cypher%20Stack%20crypto%20March%202023/Audit.pdf), culminating in commit 669d2dbffc1dafb82a09d9419ea182667115df06.