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+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2015 Andreas Enge <andreas@enge.fr>
+;;;
+;;; This file is part of GNU Guix.
+;;;
+;;; GNU Guix is free software; you can redistribute it and/or modify it
+;;; under the terms of the GNU General Public License as published by
+;;; the Free Software Foundation; either version 3 of the License, or (at
+;;; your option) any later version.
+;;;
+;;; GNU Guix is distributed in the hope that it will be useful, but
+;;; WITHOUT ANY WARRANTY; without even the implied warranty of
+;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;;; GNU General Public License for more details.
+;;;
+;;; You should have received a copy of the GNU General Public License
+;;; along with GNU Guix.  If not, see <http://www.gnu.org/licenses/>.
+
+(define-module (gnu packages finance)
+ #:use-module ((guix licenses) #:prefix license:)
+ #:use-module (guix packages)
+ #:use-module (guix download)
+ #:use-module (guix build utils)
+ #:use-module (guix build-system gnu)
+ #:use-module (gnu packages boost)
+ #:use-module (gnu packages databases)
+ #:use-module (gnu packages linux)
+ #:use-module (gnu packages pkg-config)
+ #:use-module (gnu packages protobuf)
+ #:use-module (gnu packages python)
+ #:use-module (gnu packages qt)
+ #:use-module (gnu packages tls)
+ #:use-module (gnu packages upnp))
+
+(define-public bitcoin-core
+  (package
+    (name "bitcoin-core")
+    (version "0.11.0")
+    (source (origin
+             (method url-fetch)
+             (uri
+              (string-append "https://bitcoin.org/bin/bitcoin-core-"
+                             version "/bitcoin-"
+                             version ".tar.gz"))
+             (sha256
+              (base32
+               "17yh6lq13xzzi5v2i48qaxiqm40x3hrj4gwyamkib9yzmmb1gfji"))))
+    (build-system gnu-build-system)
+    (native-inputs
+     `(("pkg-config" ,pkg-config)
+       ("python" ,python-wrapper) ; for the tests
+       ("util-linux" ,util-linux))) ; provides the hexdump command for tests
+    (inputs
+     `(("bdb" ,bdb)
+       ("boost" ,boost)
+       ("miniupnpc" ,miniupnpc)
+       ("openssl" ,openssl)
+       ("protobuf" ,protobuf)
+       ("qt" ,qt)))
+    (arguments
+     `(#:configure-flags
+        (list
+          ;; We use a bdb version newer than 4.8.
+          "--with-incompatible-bdb"
+          ;; Boost is not found unless specified manually.
+          (string-append "--with-boost="
+                         (assoc-ref %build-inputs "boost")))
+       #:phases
+        (modify-phases %standard-phases
+          (add-before 'check 'set-home
+           (lambda _
+            (setenv "HOME" (getenv "TMPDIR"))))))) ; Tests write to $HOME.
+    (home-page "https://bitcoin.org/en/")
+    (synopsis "Bitcoin peer-to-peer client")
+    (description
+     "Bitcoin is a digital currency that enables instant payments to anyone
+anywhere in the world.  It uses peer-to-peer technology to operate without
+central authority: managing transactions and issuing money are carried out
+collectively by the network.  Bitcoin Core is the reference implementation
+of the bitcoin protocol.  This package provides the Bitcoin Core command
+line client and a client based on Qt.")
+    (license license:expat)))