FEAT: Remove support for deprecated SECP256K1 flags (#140)

Author: MementoRC

Diff for: _cffi_build/secp256k1.h

@@ -14,22 +14,16 @@ typedef int (*secp256k1_nonce_function)(
     void *data,
     unsigned int attempt
 );
-#define SECP256K1_FLAGS_TYPE_MASK ...
-#define SECP256K1_FLAGS_TYPE_CONTEXT ...
-#define SECP256K1_FLAGS_TYPE_COMPRESSION ...
-#define SECP256K1_FLAGS_BIT_CONTEXT_VERIFY ...
-#define SECP256K1_FLAGS_BIT_CONTEXT_SIGN ...
-#define SECP256K1_FLAGS_BIT_CONTEXT_DECLASSIFY ...
-#define SECP256K1_FLAGS_BIT_COMPRESSION ...
+
 #define SECP256K1_CONTEXT_NONE ...
-#define SECP256K1_CONTEXT_VERIFY ...
-#define SECP256K1_CONTEXT_SIGN ...
-#define SECP256K1_CONTEXT_DECLASSIFY ...
 #define SECP256K1_EC_COMPRESSED ...
 #define SECP256K1_EC_UNCOMPRESSED ...
 #define SECP256K1_TAG_PUBKEY_EVEN ...
 #define SECP256K1_TAG_PUBKEY_ODD ...
 #define SECP256K1_TAG_PUBKEY_UNCOMPRESSED ...
+#define SECP256K1_TAG_PUBKEY_HYBRID_EVEN ...
+#define SECP256K1_TAG_PUBKEY_HYBRID_ODD ...
+
 extern const secp256k1_context *secp256k1_context_static;
 extern void secp256k1_selftest(void);
 extern secp256k1_context *secp256k1_context_create(

Diff for: coincurve/_windows_libsecp256k1.py

@@ -23,21 +23,14 @@
     unsigned int attempt
 );
 
-#define SECP256K1_FLAGS_TYPE_MASK 255
-#define SECP256K1_FLAGS_TYPE_CONTEXT 1
-#define SECP256K1_FLAGS_TYPE_COMPRESSION 2
-#define SECP256K1_FLAGS_BIT_CONTEXT_VERIFY 256
-#define SECP256K1_FLAGS_BIT_CONTEXT_SIGN 512
-#define SECP256K1_FLAGS_BIT_CONTEXT_DECLASSIFY 1024
-#define SECP256K1_FLAGS_BIT_COMPRESSION 256
-#define SECP256K1_TAG_PUBKEY_EVEN 2
-#define SECP256K1_TAG_PUBKEY_ODD 3
-#define SECP256K1_TAG_PUBKEY_UNCOMPRESSED 4
-
 #define SECP256K1_CONTEXT_NONE 1
-#define SECP256K1_CONTEXT_DECLASSIFY 1025
 #define SECP256K1_EC_COMPRESSED 258
 #define SECP256K1_EC_UNCOMPRESSED 2
+#define SECP256K1_TAG_PUBKEY_EVEN 2
+#define SECP256K1_TAG_PUBKEY_ODD 3
+#define SECP256K1_TAG_PUBKEY_UNCOMPRESSED 4
+#define SECP256K1_TAG_PUBKEY_HYBRID_EVEN 6
+#define SECP256K1_TAG_PUBKEY_HYBRID_ODD 7
 
 extern const secp256k1_context *secp256k1_context_static;
 extern void secp256k1_selftest(void);

Diff for: coincurve/context.py

@@ -2,13 +2,13 @@
 from threading import Lock
 from typing import Optional
 
-from coincurve.flags import CONTEXT_ALL, CONTEXT_FLAGS
+from coincurve.flags import CONTEXT_FLAGS, CONTEXT_NONE
 
 from ._libsecp256k1 import ffi, lib
 
 
 class Context:
-    def __init__(self, seed: Optional[bytes] = None, flag=CONTEXT_ALL, name: str = ''):
+    def __init__(self, seed: Optional[bytes] = None, flag=CONTEXT_NONE, name: str = ''):
         if flag not in CONTEXT_FLAGS:
             raise ValueError(f'{flag} is an invalid context flag.')
         self._lock = Lock()

Diff for: coincurve/flags.py

@@ -1,10 +1,16 @@
 from ._libsecp256k1 import lib
 
-CONTEXT_SIGN = lib.SECP256K1_CONTEXT_SIGN
-CONTEXT_VERIFY = lib.SECP256K1_CONTEXT_VERIFY
-CONTEXT_ALL = CONTEXT_SIGN | CONTEXT_VERIFY
 CONTEXT_NONE = lib.SECP256K1_CONTEXT_NONE
-CONTEXT_FLAGS = {CONTEXT_SIGN, CONTEXT_VERIFY, CONTEXT_ALL, CONTEXT_NONE}
+CONTEXT_FLAGS = {
+    CONTEXT_NONE,
+}
 
 EC_COMPRESSED = lib.SECP256K1_EC_COMPRESSED
 EC_UNCOMPRESSED = lib.SECP256K1_EC_UNCOMPRESSED
+
+# Additional flags available from libsecp256k1
+# lib.SECP256K1_TAG_PUBKEY_EVEN
+# lib.SECP256K1_TAG_PUBKEY_ODD
+# lib.SECP256K1_TAG_PUBKEY_UNCOMPRESSED
+# lib.SECP256K1_TAG_PUBKEY_HYBRID_EVEN
+# lib.SECP256K1_TAG_PUBKEY_HYBRID_ODD

Diff for: tests/test_flags.py

@@ -1,19 +1,13 @@
 from coincurve.flags import (
-    CONTEXT_ALL,
     CONTEXT_FLAGS,
     CONTEXT_NONE,
-    CONTEXT_SIGN,
-    CONTEXT_VERIFY,
     EC_COMPRESSED,
     EC_UNCOMPRESSED,
 )
 
 
 def test_context_flags():
     expected_flags = {
-        CONTEXT_SIGN,
-        CONTEXT_VERIFY,
-        CONTEXT_ALL,
         CONTEXT_NONE,
     }
     assert CONTEXT_FLAGS == expected_flags
@@ -24,21 +18,6 @@ def test_context_none():
     assert CONTEXT_NONE == (1 << 0)
 
 
-def test_context_sign():
-    # From libsecp256k1's include/secp256k1.h
-    assert CONTEXT_SIGN == ((1 << 0) | (1 << 9))
-
-
-def test_context_verify():
-    # From libsecp256k1's include/secp256k1.h
-    assert CONTEXT_VERIFY == ((1 << 0) | (1 << 8))
-
-
-def test_context_all():
-    # From libsecp256k1's include/secp256k1.h
-    assert CONTEXT_ALL == (CONTEXT_SIGN | CONTEXT_VERIFY)
-
-
 def test_ec_compressed():
     # From libsecp256k1's include/secp256k1.h
     assert EC_COMPRESSED == (1 << 1) | (1 << 8)