Function ecdsaVerify

ecdsaVerify(
    publicKey: Uint8Array,
    signature: Uint8Array,
    message: Uint8Array,
): boolean
Verify an ECDSA signature with secp256k1.

The message is hashed with double SHA-256 before verification (Bitcoin standard).
Parameters
- publicKey: Uint8Array
  33-byte compressed secp256k1 public key
- signature: Uint8Array
  64-byte compact signature (r || s format)
- message: Uint8Array
  Original message that was signed
Returns boolean
true if signature is valid, false if signature verification fails

Throws
If public key is not 33 bytes or signature is not 64 bytes
- Defined in ecdsa-signing.ts:46