fix(ssa refactor): schnorr signature handling (#1727)

* fix(ssa refactor): schnorr inputs

* chore(ssa refactor): cp working test

crates/nargo_cli/tests/test_data_ssa_refactor/schnorr/Nargo.toml

@@ -0,0 +1,5 @@
+[package]
+authors = [""]
+compiler_version = "0.1"
+
+[dependencies]

crates/nargo_cli/tests/test_data_ssa_refactor/schnorr/Prover.toml

@@ -0,0 +1,9 @@
+message = [0,1,2,3,4,5,6,7,8,9]
+pub_key_x = "0x17cbd3ed3151ccfd170efe1d54280a6a4822640bf5c369908ad74ea21518a9c5"
+pub_key_y = "0x0e0456e3795c1a31f20035b741cd6158929eeccd320d299cfcac962865a6bc74"
+signature = [
+    5, 202, 31, 146, 81, 242, 246, 69, 43, 107, 249, 153, 198, 44, 14, 111, 191, 121, 137, 166, 
+    160, 103, 18, 181, 243, 233, 226, 95, 67, 16, 37, 128, 85, 76, 19, 253, 30, 77, 192, 53, 138, 
+    205, 69, 33, 236, 163, 83, 194, 84, 137, 184, 221, 176, 121, 179, 27, 63, 70, 54, 16, 176, 
+    250, 39, 239,
+]

crates/nargo_cli/tests/test_data_ssa_refactor/schnorr/src/main.nr

@@ -0,0 +1,10 @@
+use dep::std;
+
+// Note: If main has any unsized types, then the verifier will never be able
+// to figure out the circuit instance
+fn main(message: [u8; 10], pub_key_x: Field, pub_key_y: Field, signature: [u8; 64]) {
+    // Is there ever a situation where someone would want 
+    // to ensure that a signature was invalid?
+    let valid_signature = std::schnorr::verify_signature(pub_key_x,pub_key_y,signature, message);
+    assert(valid_signature);
+}

crates/noirc_evaluator/src/ssa_refactor/acir_gen/acir_ir/generated_acir.rs

@@ -222,9 +222,9 @@ impl GeneratedAcir {
             BlackBoxFunc::SchnorrVerify => BlackBoxFuncCall::SchnorrVerify {
                 public_key_x: inputs[0],
                 public_key_y: inputs[1],
-                // Schnorr signature is two field field elements (r,s)
-                signature: vec![inputs[2], inputs[3]],
-                message: inputs[4..].to_vec(),
+                // Schnorr signature is an r & s, 32 bytes each
+                signature: inputs[2..66].to_vec(),
+                message: inputs[66..].to_vec(),
                 output: outputs[0],
             },
             BlackBoxFunc::Pedersen => BlackBoxFuncCall::Pedersen {