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Fix pointer types #17

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Fix pointer types #17

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4 changes: 2 additions & 2 deletions secp256k1/__init__.py
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Original file line number Diff line number Diff line change
Expand Up @@ -220,7 +220,7 @@ def serialize(self, compressed=True):
assert self.public_key, "No public key defined"

len_compressed = 33 if compressed else 65
res_compressed = ffi.new('char [%d]' % len_compressed)
res_compressed = ffi.new('unsigned char [%d]' % len_compressed)
outlen = ffi.new('size_t *', len_compressed)
compflag = EC_COMPRESSED if compressed else EC_UNCOMPRESSED

Expand Down Expand Up @@ -501,7 +501,7 @@ def _tweak_private(inst, func, scalar):
raise TypeError('scalar must be composed of 32 bytes')

# Create a copy of the current private key.
key = ffi.new('char [32]', inst.private_key)
key = ffi.new('unsigned char [32]', inst.private_key)

res = func(inst.ctx, key, scalar)
if not res:
Expand Down