Add MSRV for 1.63 (#34)

Cargo.toml

@@ -2,18 +2,19 @@
 name = "bip322"
 version = "0.0.7"
 edition = "2021"
-description = "Implements BIP322 generic message signing"
+description = "Implements BIP322 generic message signing and verification"
 license = "CC0-1.0"
 homepage = "https://bip322.rs"
 repository = "https://github.com/raphjaph/bip322"
+rust-version = "1.63"
 
 [dependencies]
 base64 = "0.22.1"
-bitcoin = { version =  "0.31.2" }
+bitcoin = "0.31.2" 
 bitcoin_hashes = "0.14.0"
 hex = "0.4.3"
 miniscript = "11.0.0"
-snafu = "0.8.4"
+snafu = { version =  "0.8.4", default-features = false, features = ["rust_1_61", "std"] }
 
 [dev-dependencies]
 pretty_assertions = "1.4.0"

README.md

@@ -42,3 +42,7 @@ The WASM binary and Javascript glue code can then be found in `www/pkg`. The
 [bip322.rs](https://bip322.rs) site also runs a small WASM binary if you'd like
 to check it out.
 
+## MSRV
+
+At the moment the Minimum Supported Rust Version (MSRV) is 1.63. You can check
+it by running `just msrv`.

justfile

@@ -20,6 +20,9 @@ outdated:
 coverage:
   cargo llvm-cov
 
+msrv:
+  cargo msrv verify -- rustup run 1.63 cargo check
+
 wasm:
   AR=/opt/homebrew/opt/llvm/bin/llvm-ar \
   CC=/opt/homebrew/opt/llvm/bin/clang \

src/verify.rs

@@ -100,7 +100,9 @@ fn verify_full_p2wpkh(
     return Err(Error::ToSignInvalid);
   }
 
-  let Some(witness) = to_sign.inputs[0].final_script_witness.clone() else {
+  let witness = if let Some(witness) = to_sign.inputs[0].final_script_witness.clone() {
+    witness
+  } else {
     return Err(Error::WitnessEmpty);
   };
 
@@ -182,7 +184,9 @@ fn verify_full_p2tr(
     return Err(Error::ToSignInvalid);
   }
 
-  let Some(witness) = to_sign.inputs[0].final_script_witness.clone() else {
+  let witness = if let Some(witness) = to_sign.inputs[0].final_script_witness.clone() {
+    witness
+  } else {
     return Err(Error::WitnessEmpty);
   };