From b6fda6517c154a49e3a901f8409a4196ac66ed22 Mon Sep 17 00:00:00 2001
From: "Tobin C. Harding" <me@tobin.cc>
Date: Sat, 10 Aug 2024 06:57:04 +1000
Subject: [PATCH] Implement JsonSchema for siphash::Hash

We lost this impl at some stage in the last few weeks and did not notice
because of a bug in `run_task` [0].

Implement `JsonSchema` for `siphash` as we do for all the other hash
types.

[0] https://github.com/rust-bitcoin/rust-bitcoin-maintainer-tools/issues/10
---
 hashes/src/siphash24.rs | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/hashes/src/siphash24.rs b/hashes/src/siphash24.rs
index 2e57adcdd..9895ee0f5 100644
--- a/hashes/src/siphash24.rs
+++ b/hashes/src/siphash24.rs
@@ -14,6 +14,21 @@ use crate::HashEngine as _;
 #[repr(transparent)]
 pub struct Hash([u8; 8]);
 
+#[cfg(feature = "schemars")]
+impl schemars::JsonSchema for Hash {
+    fn schema_name() -> String { "Hash".to_owned() }
+
+    fn json_schema(gen: &mut schemars::gen::SchemaGenerator) -> schemars::schema::Schema {
+        let mut schema: schemars::schema::SchemaObject = <String>::json_schema(gen).into();
+        schema.string = Some(Box::new(schemars::schema::StringValidation {
+            max_length: Some(8 * 2),
+            min_length: Some(8 * 2),
+            pattern: Some("[0-9a-fA-F]+".to_owned()),
+        }));
+        schema.into()
+    }
+}
+
 #[cfg(not(hashes_fuzz))]
 fn from_engine(e: HashEngine) -> Hash { Hash::from_u64(Hash::from_engine_to_u64(e)) }