Rename transcript-trait to flexible-transcript

It offers the trait for flexibility, yet it also offers an incredibly 
competent (and logical) transcript format, along with a Merlin wrapper.

coins/monero/Cargo.toml

@@ -23,7 +23,7 @@ curve25519-dalek = { version = "3", features = ["std"] }
 group = { version = "0.12", optional = true }
 
 dalek-ff-group = { path = "../../crypto/dalek-ff-group", optional = true }
-transcript = { package = "transcript-trait", path = "../../crypto/transcript", features = ["recommended"], optional = true }
+transcript = { package = "flexible-transcript", path = "../../crypto/transcript", features = ["recommended"], optional = true }
 frost = { package = "modular-frost", path = "../../crypto/frost", features = ["ed25519"], optional = true }
 
 monero = "0.16"

crypto/frost/Cargo.toml

@@ -23,7 +23,7 @@ p256 = { version = "0.11", features = ["arithmetic", "hash2curve"], optional = t
 k256 = { version = "0.11", features = ["arithmetic", "hash2curve"], optional = true }
 dalek-ff-group = { path = "../dalek-ff-group", version = "0.1", optional = true }
 
-transcript = { package = "transcript-trait", path = "../transcript", version = "0.1" }
+transcript = { package = "flexible-transcript", path = "../transcript", version = "0.1" }
 
 multiexp = { path = "../multiexp", version = "0.1", features = ["batch"] }
 

crypto/transcript/Cargo.toml

@@ -1,7 +1,7 @@
 [package]
-name = "transcript-trait"
+name = "flexible-transcript"
 version = "0.1.1"
-description = "A simple transcript trait definition"
+description = "A simple transcript trait definition, along with viable options"
 license = "MIT"
 repository = "https://github.com/serai-dex/serai"
 authors = ["Luke Parker <lukeparker5132@gmail.com>"]

crypto/transcript/README.md

@@ -1,3 +1,24 @@
-# Transcript
+# Flexible Transcript
 
-Basic transcript trait with a Merlin wrapper available via the Merlin feature.
+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).
+
+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`.

processor/Cargo.toml

@@ -18,7 +18,7 @@ serde_json = "1.0"
 curve25519-dalek = { version = "3", features = ["std"] }
 blake2 = "0.10"
 
-transcript = { package = "transcript-trait", path = "../crypto/transcript", features = ["recommended"] }
+transcript = { package = "flexible-transcript", path = "../crypto/transcript", features = ["recommended"] }
 dalek-ff-group = { path = "../crypto/dalek-ff-group" }
 frost = { package = "modular-frost", path = "../crypto/frost" }