Tools to compute UnixFS IPFS hash.

libdevcore/IpfsHash.h

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+/*
+	This file is part of solidity.
+
+	solidity 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.
+
+	solidity 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 solidity.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#pragma once
+
+#include <libdevcore/Common.h>
+
+#include <string>
+
+namespace dev
+{
+
+/// Compute the "ipfs hash" of a file with the content @a _data.
+/// The output will be the multihash of the UnixFS protobuf encoded data.
+/// As hash function it will use sha2-256.
+/// The effect is that the hash should be identical to the one produced by
+/// the command `ipfs add <filename>`.
+bytes ipfsHash(std::string _data);
+
+/// Compute the "ipfs hash" as above, but encoded in base58 as used by ipfs / bitcoin.
+std::string ipfsHashBase58(std::string _data);
+
+}