Remove non-standard support

I removed support for all non-standard features:

- ECDH
- Schnorr Signatures
- Signature Recovery

These features are rarely compiled in shared libraries avaliable
from distribution repositories. Also, they are not needed for any
Haskoin project, so there is little incentive for me to continue
maintaining them, especially when I have no good way to test this
code.

Please make your own fork of this library if you wish to add these
back.

.travis.yml

@@ -0,0 +1,41 @@
+# This is the simple Travis configuration, which is intended for use
+# on applications which do not require cross-platform and
+# multiple-GHC-version support. For more information and other
+# options, see:
+#
+# https://docs.haskellstack.org/en/stable/travis_ci/
+#
+# Copy these contents into the root directory of your Github project in a file
+# named .travis.yml
+
+# Choose a build environment
+dist: xenial
+
+# Do not choose a language; we provide our own build tools.
+language: generic
+
+# Caching so the next build will be fast too.
+cache:
+  directories:
+  - $HOME/.stack
+
+# Ensure necessary system libraries are present
+addons:
+  apt:
+    packages:
+      - libgmp-dev
+      - secp256k1
+
+before_install:
+# Download and unpack the stack executable
+- mkdir -p ~/.local/bin
+- export PATH=$HOME/.local/bin:$PATH
+- travis_retry curl -L https://get.haskellstack.org/stable/linux-x86_64.tar.gz | tar xz --wildcards --strip-components=1 -C ~/.local/bin '*/stack'
+
+install:
+# Build dependencies
+- stack --no-terminal --install-ghc test --only-dependencies
+
+script:
+# Build the package, its tests, and its docs and run the tests
+- stack --no-terminal test --haddock --no-haddock-deps

CHANGELOG.md

@@ -4,11 +4,26 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
+## 0.2.6
+### Fixed
+- Compiles with all flags now.
+
+### Added
+- Script to compile with all flags.
+
+### Removed
+- Remove ECDH support.
+- Remove Schnorr support.
+- Remove Recovery support.
+
 ## 0.2.5
 ### Changed
 - Reuse context aggressively.
 - Generate context in a single thread.
 
+### Fixed
+- Memory deallocation bug.
+
 ## 0.2.4
 ### Changed
 - Update Cabal and package version.

package.yaml

@@ -1,5 +1,5 @@
 name: secp256k1-haskell
-version: 0.2.5
+version: 0.3.0
 synopsis: Bindings for secp256k1
 description: Sign and verify signatures using the secp256k1 library.
 category: Crypto
@@ -23,15 +23,6 @@ dependencies:
   - hashable
   - QuickCheck
   - string-conversions
-when:
-  - condition: flag(ecdh)
-    cpp-options: -DECDH
-  - condition: flag(schnorr)
-    cpp-options: -DSCHNORR
-  - condition: flag(recovery)
-    cpp-options: -DRECOVERY
-  - condition: flag(negate)
-    cpp-options: -DNEGATE
 library:
   source-dirs: src
   generated-exposed-modules:
@@ -55,20 +46,3 @@ tests:
       - monad-par
       - mtl
       - HUnit
-flags:
-  negate:
-    description: "Enable tweak negate"
-    manual: true
-    default: false
-  ecdh:
-    description: "Enable (experimental) ECDH APIs"
-    manual: true
-    default: false
-  schnorr:
-    description: "Enable BIP-340 (Schnorr) APIs"
-    manual: true
-    default: false
-  recovery:
-    description: "Enable signature key recovery APIs"
-    manual: true
-    default: false

secp256k1-haskell.cabal

@@ -4,10 +4,10 @@ cabal-version: 2.0
 --
 -- see: https://github.com/sol/hpack
 --
--- hash: f64a6c7d68d58fab5fc141dd7bda78089fe9403dc39525641eba1ca0fd92593c
+-- hash: d55c31829652e236145323f89ee1ec9c61e4f18712778a13011c688d36db8b19
 
 name:           secp256k1-haskell
-version:        0.2.5
+version:        0.3.0
 synopsis:       Bindings for secp256k1
 description:    Sign and verify signatures using the secp256k1 library.
 category:       Crypto
@@ -27,26 +27,6 @@ source-repository head
   type: git
   location: https://github.com/haskoin/secp256k1-haskell.git
 
-flag ecdh
-  description: Enable (experimental) ECDH APIs
-  manual: True
-  default: False
-
-flag negate
-  description: Enable tweak negate
-  manual: True
-  default: False
-
-flag recovery
-  description: Enable signature key recovery APIs
-  manual: True
-  default: False
-
-flag schnorr
-  description: Enable BIP-340 (Schnorr) APIs
-  manual: True
-  default: False
-
 library
   exposed-modules:
       Crypto.Secp256k1
@@ -68,14 +48,6 @@ library
     , entropy
     , hashable
     , string-conversions
-  if flag(ecdh)
-    cpp-options: -DECDH
-  if flag(schnorr)
-    cpp-options: -DSCHNORR
-  if flag(recovery)
-    cpp-options: -DRECOVERY
-  if flag(negate)
-    cpp-options: -DNEGATE
   default-language: Haskell2010
 
 test-suite spec
@@ -103,13 +75,5 @@ test-suite spec
     , mtl
     , secp256k1-haskell
     , string-conversions
-  if flag(ecdh)
-    cpp-options: -DECDH
-  if flag(schnorr)
-    cpp-options: -DSCHNORR
-  if flag(recovery)
-    cpp-options: -DRECOVERY
-  if flag(negate)
-    cpp-options: -DNEGATE
   default-language: Haskell2010
   build-tool-depends: hspec-discover:hspec-discover