native.rb in tapyrus-0.2.4

- old
+ new

@@ -2,12 +2,12 @@
 # https://github.com/lian/bitcoin-ruby/blob/master/COPYING
 
 module Tapyrus
   module Secp256k1
 
-    # binding for secp256k1 (https://github.com/bitcoin/bitcoin/tree/v0.14.2/src/secp256k1)
-    # tag: v0.14.2
+    # binding for secp256k1 (https://github.com/chaintope/tapyrus-core/tree/v0.4.0/src/secp256k1)
+    # tag: v0.4.0
     # this is not included by default, to enable set shared object path to ENV['SECP256K1_LIB_PATH']
     # for linux, ENV['SECP256K1_LIB_PATH'] = '/usr/local/lib/libsecp256k1.so'
     # for mac,
     module Native
       include ::FFI::Library
@@ -195,10 +195,10 @@
           raise 'priv_key invalid' unless secp256k1_ec_seckey_verify(context, secret)
 
           signature = FFI::MemoryPointer.new(:uchar, 64)
           msg32 = FFI::MemoryPointer.new(:uchar, 32).put_bytes(0, data)
           raise 'Failed to generate schnorr signature.' unless secp256k1_schnorr_sign(context, signature, msg32, secret, nil, nil) == 1
-          signature.read_string
+          signature.read_string(64)
         end
       end
 
       def verify_ecdsa(data, sig, pub_key)
         with_context do |context|