From 9f9057555d5d8907f3537069044f7503b81c3ee7 Mon Sep 17 00:00:00 2001
From: Dr Maxim Orlovsky <orlovsky@lnp-bp.org>
Date: Sat, 10 Feb 2024 16:52:16 +0100
Subject: [PATCH] id: add StrictHash type

---
 commit_verify/src/id.rs  | 26 +++++++++++++++++++++++++-
 commit_verify/src/lib.rs |  2 +-
 2 files changed, 26 insertions(+), 2 deletions(-)

diff --git a/commit_verify/src/id.rs b/commit_verify/src/id.rs
index 47024207..dde6bcfa 100644
--- a/commit_verify/src/id.rs
+++ b/commit_verify/src/id.rs
@@ -19,11 +19,12 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+use amplify::Bytes32;
 use sha2::Sha256;
 use strict_encoding::{StrictEncode, StrictType};
 use strict_types::typesys::TypeFqn;
 
-use crate::DigestExt;
+use crate::{DigestExt, LIB_NAME_COMMIT_VERIFY};
 
 pub struct CommitEngine {
     finished: bool,
@@ -125,3 +126,26 @@ impl<T: CommitEncode> CommitId for T {
 
     fn commit_id(&self) -> Self::CommitmentId { self.commit().finish().into() }
 }
+
+#[derive(Wrapper, Copy, Clone, Ord, PartialOrd, Eq, PartialEq, Hash, Debug, From)]
+#[wrapper(Deref, BorrowSlice, Display, FromStr, Hex, Index, RangeOps)]
+#[derive(StrictDumb, strict_encoding::StrictType, StrictEncode, StrictDecode)]
+#[strict_type(lib = LIB_NAME_COMMIT_VERIFY)]
+#[cfg_attr(
+    feature = "serde",
+    derive(Serialize, Deserialize),
+    serde(crate = "serde_crate", transparent)
+)]
+pub struct StrictHash(
+    #[from]
+    #[from([u8; 32])]
+    Bytes32,
+);
+
+impl CommitmentId for StrictHash {
+    const TAG: &'static str = "urn:ubideco:strict-types:value-hash#2024-02-10";
+}
+
+impl From<Sha256> for StrictHash {
+    fn from(hash: Sha256) -> Self { hash.finish().into() }
+}
diff --git a/commit_verify/src/lib.rs b/commit_verify/src/lib.rs
index 51eedafe..00ea5ada 100644
--- a/commit_verify/src/lib.rs
+++ b/commit_verify/src/lib.rs
@@ -62,7 +62,7 @@ pub use conceal::Conceal;
 pub use convolve::{ConvolveCommit, ConvolveCommitProof, ConvolveVerifyError};
 pub use digest::{Digest, DigestExt, Ripemd160, Sha256};
 pub use embed::{EmbedCommitProof, EmbedCommitVerify, EmbedVerifyError, VerifyEq};
-pub use id::{CommitEncode, CommitEngine, CommitId, CommitmentId, CommitmentLayout};
+pub use id::{CommitEncode, CommitEngine, CommitId, CommitmentId, CommitmentLayout, StrictHash};
 pub use merkle::{MerkleBuoy, MerkleHash, MerkleLeaves, MerkleNode, NodeBranching};
 
 pub const LIB_NAME_COMMIT_VERIFY: &str = "CommitVerify";