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zcash_history/README.md

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+# zcash_mmr
+
+Special implementation of Merkle mountain ranges (MMR) for Zcash!
+
+[![Build Status](https://travis-ci.org/NikVolf/zcash-mmr.svg?branch=master)](https://travis-ci.org/NikVolf/zcash-mmr)
+
+The main design goals of this MMR implementation are
+
+- Allow zero-cache and avoid db callbacks. As it is implemented, calling side must just smartly pre-load MMR nodes from the database (about log2(tree length) for append, twice as much for deletion).
+
+- Reuse as much logic between rust and c++ clients and place it here and librustzcash.
+
+- Close to zero memory consumption.
+
+# License
+
+`zcash_mmr` is distributed under the terms of both the MIT
+license and the Apache License (Version 2.0), at your choice.
+
+See LICENSE-APACHE, and LICENSE-MIT for details.
+
+### Contribution
+
+Unless you explicitly state otherwise, any contribution intentionally submitted
+for inclusion in `zcash_mmr` by you, as defined in the Apache-2.0 license, shall be
+dual licensed as above, without any additional terms or conditions.