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remove typo

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James Prestwich 2019-07-01 11:46:10 -07:00 committed by Daira Hopwood
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zip-0221.rst
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@ -32,7 +32,7 @@ The terms "branch" and "network upgrade" in this document are to be interpreted
Abstract
---------
This ZIP specifies modifications to be made to the Zcash block header format to include Merkle Mountain Range (MMR) commitments. Sapling (NU2) introduced the ``hashFinalSaplingRoot`` field to Zcash headers. This ZIP replaces the ``hashFinalSaplingRoot`` commitment with ``hashChainHistoryRoot``, which is the root of an MMR that commits that commits to many features of the chain's history, including all information present in ``hashFinalSaplingRoot``.
This ZIP specifies modifications to be made to the Zcash block header format to include Merkle Mountain Range (MMR) commitments. Sapling (NU2) introduced the ``hashFinalSaplingRoot`` field to Zcash headers. This ZIP replaces the ``hashFinalSaplingRoot`` commitment with ``hashChainHistoryRoot``, which is the root of an MMR that commits to many features of the chain's history, including all information present in ``hashFinalSaplingRoot``.
The MMR that produces the root provides a number of benefits to light clients, and enables future specification of the FlyClient protocol [#FlyClient]_. This ZIP specifies only consensus-layer changes. It does not provide any specification about the FlyClient protocol's operation.