add header

secp256k1.h

@@ -0,0 +1,8 @@
+#ifndef _SECP256K1_
+#define _SECP256K1_
+
+namespace secp256k1 {
+int VerifyECDSA(const unsigned char *msg, int msglen, const unsigned char *sig, int siglen, const unsigned char *pubkey, int pubkeylen);
+}
+
+#endif