Support commit-encoding for PhantomData types

Cargo.toml

@@ -13,7 +13,7 @@ default-members = [
 ]
 
 [workspace.package]
-version = "0.11.0-beta.2"
+version = "0.11.0-beta.3"
 authors = ["Dr Maxim Orlovsky <[email protected]>"]
 homepage = "https://github.com/LNP-BP"
 repository = "https://github.com/LNP-BP/client_side_validation"
@@ -41,8 +41,8 @@ name = "client_side_validation"
 path = "src/lib.rs"
 
 [dependencies]
-commit_verify = { version = "0.11.0-beta.2", path = "./commit_verify", default-features = false }
-single_use_seals = { version = "0.11.0-beta.2", path = "./single_use_seals" }
+commit_verify = { version = "0.11.0-beta.3", path = "./commit_verify", default-features = false }
+single_use_seals = { version = "0.11.0-beta.3", path = "./single_use_seals" }
 serde_crate = { package = "serde", version = "1", features = ["derive"], optional = true }
 
 [features]

commit_verify/src/encode.rs

@@ -63,6 +63,7 @@
 //! [LNPBP-9]: https://github.com/LNP-BP/LNPBPs/blob/master/lnpbp-0009.md
 
 use std::io;
+use std::marker::PhantomData;
 
 use crate::id::CommitmentId;
 use crate::Conceal;
@@ -336,3 +337,8 @@ pub mod strategies {
 impl CommitEncode for [u8; 32] {
     fn commit_encode(&self, e: &mut impl io::Write) { e.write_all(self).ok(); }
 }
+
+impl<T> CommitEncode for PhantomData<T> {
+    fn commit_encode(&self, _: &mut impl io::Write) { /* nothing to do */
+    }
+}

commit_verify/src/mpc/block.rs

@@ -666,7 +666,7 @@ mod test {
 
         let (pid, msg) = msgs.first_key_value().unwrap();
         let leaf = Leaf::inhabited(*pid, *msg);
-        let cid1 = block.cross_section.get(0).unwrap().to_merkle_node();
+        let cid1 = block.cross_section.first().unwrap().to_merkle_node();
         let cid2 = leaf.commitment_id();
         assert_eq!(cid1, cid2);