add ecdsa

docs/standard_library/cryptographic_primitives/03_ecdsa_secp256k1.md

@@ -0,0 +1,21 @@
+---
+title: ECDSA Verification
+description:
+  Learn about the cryptographic primitives regarding ECDSA over the secp256k1 curve
+keywords:
+  [
+    cryptographic primitives,
+    Noir project,
+    ecdsa,
+    secp256k1,
+    signatures,
+  ]
+---
+
+## ecdsa_secp256k1::verify_signature
+
+Verifier for ECDSA Secp256k1 signatures
+
+```rust
+fn verify_signature(_public_key_x : [u8; 32], _public_key_y : [u8; 32], _signature: [u8; 64], _message: [u8]) -> Field
+```