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<title>Protocol Documentation</title>
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<h1 id="title">Protocol Documentation</h1>
<h2>Table of Contents</h2>
<div id="toc-container">
<ul id="toc">
<li>
<a href="#compact_formats.proto">compact_formats.proto</a>
<ul>
<li>
<a href="#cash.z.wallet.sdk.rpc.CompactBlock"><span class="badge">M</span>CompactBlock</a>
</li>
<li>
<a href="#cash.z.wallet.sdk.rpc.CompactOutput"><span class="badge">M</span>CompactOutput</a>
</li>
<li>
<a href="#cash.z.wallet.sdk.rpc.CompactSpend"><span class="badge">M</span>CompactSpend</a>
</li>
<li>
<a href="#cash.z.wallet.sdk.rpc.CompactTx"><span class="badge">M</span>CompactTx</a>
</li>
</ul>
</li>
<li>
<a href="#darkside.proto">darkside.proto</a>
<ul>
<li>
<a href="#cash.z.wallet.sdk.rpc.DarksideBlock"><span class="badge">M</span>DarksideBlock</a>
</li>
<li>
<a href="#cash.z.wallet.sdk.rpc.DarksideBlocksURL"><span class="badge">M</span>DarksideBlocksURL</a>
</li>
<li>
<a href="#cash.z.wallet.sdk.rpc.DarksideEmptyBlocks"><span class="badge">M</span>DarksideEmptyBlocks</a>
</li>
<li>
<a href="#cash.z.wallet.sdk.rpc.DarksideHeight"><span class="badge">M</span>DarksideHeight</a>
</li>
<li>
<a href="#cash.z.wallet.sdk.rpc.DarksideMetaState"><span class="badge">M</span>DarksideMetaState</a>
</li>
<li>
<a href="#cash.z.wallet.sdk.rpc.DarksideTransactionsURL"><span class="badge">M</span>DarksideTransactionsURL</a>
</li>
<li>
<a href="#cash.z.wallet.sdk.rpc.DarksideStreamer"><span class="badge">S</span>DarksideStreamer</a>
</li>
</ul>
</li>
<li>
<a href="#service.proto">service.proto</a>
<ul>
<li>
<a href="#cash.z.wallet.sdk.rpc.Address"><span class="badge">M</span>Address</a>
</li>
<li>
<a href="#cash.z.wallet.sdk.rpc.AddressList"><span class="badge">M</span>AddressList</a>
</li>
<li>
<a href="#cash.z.wallet.sdk.rpc.Balance"><span class="badge">M</span>Balance</a>
</li>
<li>
<a href="#cash.z.wallet.sdk.rpc.BlockID"><span class="badge">M</span>BlockID</a>
</li>
<li>
<a href="#cash.z.wallet.sdk.rpc.BlockRange"><span class="badge">M</span>BlockRange</a>
</li>
<li>
<a href="#cash.z.wallet.sdk.rpc.ChainSpec"><span class="badge">M</span>ChainSpec</a>
</li>
<li>
<a href="#cash.z.wallet.sdk.rpc.Duration"><span class="badge">M</span>Duration</a>
</li>
<li>
<a href="#cash.z.wallet.sdk.rpc.Empty"><span class="badge">M</span>Empty</a>
</li>
<li>
<a href="#cash.z.wallet.sdk.rpc.Exclude"><span class="badge">M</span>Exclude</a>
</li>
<li>
<a href="#cash.z.wallet.sdk.rpc.GetAddressUtxosArg"><span class="badge">M</span>GetAddressUtxosArg</a>
</li>
<li>
<a href="#cash.z.wallet.sdk.rpc.GetAddressUtxosReply"><span class="badge">M</span>GetAddressUtxosReply</a>
</li>
<li>
<a href="#cash.z.wallet.sdk.rpc.GetAddressUtxosReplyList"><span class="badge">M</span>GetAddressUtxosReplyList</a>
</li>
<li>
<a href="#cash.z.wallet.sdk.rpc.LightdInfo"><span class="badge">M</span>LightdInfo</a>
</li>
<li>
<a href="#cash.z.wallet.sdk.rpc.PingResponse"><span class="badge">M</span>PingResponse</a>
</li>
<li>
<a href="#cash.z.wallet.sdk.rpc.RawTransaction"><span class="badge">M</span>RawTransaction</a>
</li>
<li>
<a href="#cash.z.wallet.sdk.rpc.SendResponse"><span class="badge">M</span>SendResponse</a>
</li>
<li>
<a href="#cash.z.wallet.sdk.rpc.TransparentAddressBlockFilter"><span class="badge">M</span>TransparentAddressBlockFilter</a>
</li>
<li>
<a href="#cash.z.wallet.sdk.rpc.TreeState"><span class="badge">M</span>TreeState</a>
</li>
<li>
<a href="#cash.z.wallet.sdk.rpc.TxFilter"><span class="badge">M</span>TxFilter</a>
</li>
<li>
<a href="#cash.z.wallet.sdk.rpc.CompactTxStreamer"><span class="badge">S</span>CompactTxStreamer</a>
</li>
</ul>
</li>
<li><a href="#scalar-value-types">Scalar Value Types</a></li>
</ul>
</div>
<div class="file-heading">
<h2 id="compact_formats.proto">compact_formats.proto</h2><a href="#title">Top</a>
</div>
<p></p>
<h3 id="cash.z.wallet.sdk.rpc.CompactBlock">CompactBlock</h3>
<p>CompactBlock is a packaging of ONLY the data from a block that's needed to:</p><p>1. Detect a payment to your shielded Sapling address</p><p>2. Detect a spend of your shielded Sapling notes</p><p>3. Update your witnesses to generate new Sapling spend proofs.</p>
<table class="field-table">
<thead>
<tr><td>Field</td><td>Type</td><td>Label</td><td>Description</td></tr>
</thead>
<tbody>
<tr>
<td>protoVersion</td>
<td><a href="#uint32">uint32</a></td>
<td></td>
<td><p>the version of this wire format, for storage </p></td>
</tr>
<tr>
<td>height</td>
<td><a href="#uint64">uint64</a></td>
<td></td>
<td><p>the height of this block </p></td>
</tr>
<tr>
<td>hash</td>
<td><a href="#bytes">bytes</a></td>
<td></td>
<td><p>the ID (hash) of this block, same as in block explorers </p></td>
</tr>
<tr>
<td>prevHash</td>
<td><a href="#bytes">bytes</a></td>
<td></td>
<td><p>the ID (hash) of this block&#39;s predecessor </p></td>
</tr>
<tr>
<td>time</td>
<td><a href="#uint32">uint32</a></td>
<td></td>
<td><p>Unix epoch time when the block was mined </p></td>
</tr>
<tr>
<td>header</td>
<td><a href="#bytes">bytes</a></td>
<td></td>
<td><p>(hash, prevHash, and time) OR (full header) </p></td>
</tr>
<tr>
<td>vtx</td>
<td><a href="#cash.z.wallet.sdk.rpc.CompactTx">CompactTx</a></td>
<td>repeated</td>
<td><p>zero or more compact transactions from this block </p></td>
</tr>
</tbody>
</table>
<h3 id="cash.z.wallet.sdk.rpc.CompactOutput">CompactOutput</h3>
<p>output is a Sapling Output Description as described in section 7.4 of the</p><p>Zcash protocol spec. Total size is 948.</p>
<table class="field-table">
<thead>
<tr><td>Field</td><td>Type</td><td>Label</td><td>Description</td></tr>
</thead>
<tbody>
<tr>
<td>cmu</td>
<td><a href="#bytes">bytes</a></td>
<td></td>
<td><p>note commitment u-coordinate </p></td>
</tr>
<tr>
<td>epk</td>
<td><a href="#bytes">bytes</a></td>
<td></td>
<td><p>ephemeral public key </p></td>
</tr>
<tr>
<td>ciphertext</td>
<td><a href="#bytes">bytes</a></td>
<td></td>
<td><p>ciphertext and zkproof </p></td>
</tr>
</tbody>
</table>
<h3 id="cash.z.wallet.sdk.rpc.CompactSpend">CompactSpend</h3>
<p>CompactSpend is a Sapling Spend Description as described in 7.3 of the Zcash</p><p>protocol specification.</p>
<table class="field-table">
<thead>
<tr><td>Field</td><td>Type</td><td>Label</td><td>Description</td></tr>
</thead>
<tbody>
<tr>
<td>nf</td>
<td><a href="#bytes">bytes</a></td>
<td></td>
<td><p>nullifier (see the Zcash protocol specification) </p></td>
</tr>
</tbody>
</table>
<h3 id="cash.z.wallet.sdk.rpc.CompactTx">CompactTx</h3>
<p>CompactTx contains the minimum information for a wallet to know if this transaction</p><p>is relevant to it (either pays to it or spends from it) via shielded elements</p><p>only. This message will not encode a transparent-to-transparent transaction.</p>
<table class="field-table">
<thead>
<tr><td>Field</td><td>Type</td><td>Label</td><td>Description</td></tr>
</thead>
<tbody>
<tr>
<td>index</td>
<td><a href="#uint64">uint64</a></td>
<td></td>
<td><p>the index within the full block </p></td>
</tr>
<tr>
<td>hash</td>
<td><a href="#bytes">bytes</a></td>
<td></td>
<td><p>the ID (hash) of this transaction, same as in block explorers </p></td>
</tr>
<tr>
<td>fee</td>
<td><a href="#uint32">uint32</a></td>
<td></td>
<td><p>The transaction fee: present if server can provide. In the case of a
stateless server and a transaction with transparent inputs, this will be
unset because the calculation requires reference to prior transactions.
in a pure-Sapling context, the fee will be calculable as:
valueBalance &#43; (sum(vPubNew) - sum(vPubOld) - sum(tOut)) </p></td>
</tr>
<tr>
<td>spends</td>
<td><a href="#cash.z.wallet.sdk.rpc.CompactSpend">CompactSpend</a></td>
<td>repeated</td>
<td><p>inputs </p></td>
</tr>
<tr>
<td>outputs</td>
<td><a href="#cash.z.wallet.sdk.rpc.CompactOutput">CompactOutput</a></td>
<td>repeated</td>
<td><p>outputs </p></td>
</tr>
</tbody>
</table>
<div class="file-heading">
<h2 id="darkside.proto">darkside.proto</h2><a href="#title">Top</a>
</div>
<p></p>
<h3 id="cash.z.wallet.sdk.rpc.DarksideBlock">DarksideBlock</h3>
<p>A block is a hex-encoded string.</p>
<table class="field-table">
<thead>
<tr><td>Field</td><td>Type</td><td>Label</td><td>Description</td></tr>
</thead>
<tbody>
<tr>
<td>block</td>
<td><a href="#string">string</a></td>
<td></td>
<td><p> </p></td>
</tr>
</tbody>
</table>
<h3 id="cash.z.wallet.sdk.rpc.DarksideBlocksURL">DarksideBlocksURL</h3>
<p>DarksideBlocksURL is typically something like:</p><p>https://raw.githubusercontent.com/zcash-hackworks/darksidewalletd-test-data/master/basic-reorg/before-reorg.txt</p>
<table class="field-table">
<thead>
<tr><td>Field</td><td>Type</td><td>Label</td><td>Description</td></tr>
</thead>
<tbody>
<tr>
<td>url</td>
<td><a href="#string">string</a></td>
<td></td>
<td><p> </p></td>
</tr>
</tbody>
</table>
<h3 id="cash.z.wallet.sdk.rpc.DarksideEmptyBlocks">DarksideEmptyBlocks</h3>
<p></p>
<table class="field-table">
<thead>
<tr><td>Field</td><td>Type</td><td>Label</td><td>Description</td></tr>
</thead>
<tbody>
<tr>
<td>height</td>
<td><a href="#int32">int32</a></td>
<td></td>
<td><p> </p></td>
</tr>
<tr>
<td>nonce</td>
<td><a href="#int32">int32</a></td>
<td></td>
<td><p> </p></td>
</tr>
<tr>
<td>count</td>
<td><a href="#int32">int32</a></td>
<td></td>
<td><p> </p></td>
</tr>
</tbody>
</table>
<h3 id="cash.z.wallet.sdk.rpc.DarksideHeight">DarksideHeight</h3>
<p></p>
<table class="field-table">
<thead>
<tr><td>Field</td><td>Type</td><td>Label</td><td>Description</td></tr>
</thead>
<tbody>
<tr>
<td>height</td>
<td><a href="#int32">int32</a></td>
<td></td>
<td><p> </p></td>
</tr>
</tbody>
</table>
<h3 id="cash.z.wallet.sdk.rpc.DarksideMetaState">DarksideMetaState</h3>
<p></p>
<table class="field-table">
<thead>
<tr><td>Field</td><td>Type</td><td>Label</td><td>Description</td></tr>
</thead>
<tbody>
<tr>
<td>saplingActivation</td>
<td><a href="#int32">int32</a></td>
<td></td>
<td><p> </p></td>
</tr>
<tr>
<td>branchID</td>
<td><a href="#string">string</a></td>
<td></td>
<td><p> </p></td>
</tr>
<tr>
<td>chainName</td>
<td><a href="#string">string</a></td>
<td></td>
<td><p> </p></td>
</tr>
</tbody>
</table>
<h3 id="cash.z.wallet.sdk.rpc.DarksideTransactionsURL">DarksideTransactionsURL</h3>
<p>DarksideTransactionsURL refers to an HTTP source that contains a list</p><p>of hex-encoded transactions, one per line, that are to be associated</p><p>with the given height (fake-mined into the block at that height)</p>
<table class="field-table">
<thead>
<tr><td>Field</td><td>Type</td><td>Label</td><td>Description</td></tr>
</thead>
<tbody>
<tr>
<td>height</td>
<td><a href="#int32">int32</a></td>
<td></td>
<td><p> </p></td>
</tr>
<tr>
<td>url</td>
<td><a href="#string">string</a></td>
<td></td>
<td><p> </p></td>
</tr>
</tbody>
</table>
<h3 id="cash.z.wallet.sdk.rpc.DarksideStreamer">DarksideStreamer</h3>
<p>Darksidewalletd maintains two staging areas, blocks and transactions. The</p><p>Stage*() gRPCs add items to the staging area; ApplyStaged() "applies" everything</p><p>in the staging area to the working (operational) state that the mock zcashd</p><p>serves; transactions are placed into their corresponding blocks (by height).</p>
<table class="enum-table">
<thead>
<tr><td>Method Name</td><td>Request Type</td><td>Response Type</td><td>Description</td></tr>
</thead>
<tbody>
<tr>
<td>Reset</td>
<td><a href="#cash.z.wallet.sdk.rpc.DarksideMetaState">DarksideMetaState</a></td>
<td><a href="#cash.z.wallet.sdk.rpc.Empty">Empty</a></td>
<td><p>Reset reverts all darksidewalletd state (active block range, latest height,
staged blocks and transactions) and lightwalletd state (cache) to empty,
the same as the initial state. This occurs synchronously and instantaneously;
no reorg happens in lightwalletd. This is good to do before each independent
test so that no state leaks from one test to another.
Also sets (some of) the values returned by GetLightdInfo(). The Sapling
activation height specified here must be where the block range starts.</p></td>
</tr>
<tr>
<td>StageBlocksStream</td>
<td><a href="#cash.z.wallet.sdk.rpc.DarksideBlock">DarksideBlock</a> stream</td>
<td><a href="#cash.z.wallet.sdk.rpc.Empty">Empty</a></td>
<td><p>StageBlocksStream accepts a list of blocks and saves them into the blocks
staging area until ApplyStaged() is called; there is no immediate effect on
the mock zcashd. Blocks are hex-encoded. Order is important, see ApplyStaged.</p></td>
</tr>
<tr>
<td>StageBlocks</td>
<td><a href="#cash.z.wallet.sdk.rpc.DarksideBlocksURL">DarksideBlocksURL</a></td>
<td><a href="#cash.z.wallet.sdk.rpc.Empty">Empty</a></td>
<td><p>StageBlocks is the same as StageBlocksStream() except the blocks are fetched
from the given URL. Blocks are one per line, hex-encoded (not JSON).</p></td>
</tr>
<tr>
<td>StageBlocksCreate</td>
<td><a href="#cash.z.wallet.sdk.rpc.DarksideEmptyBlocks">DarksideEmptyBlocks</a></td>
<td><a href="#cash.z.wallet.sdk.rpc.Empty">Empty</a></td>
<td><p>StageBlocksCreate is like the previous two, except it creates &#39;count&#39;
empty blocks at consecutive heights starting at height &#39;height&#39;. The
&#39;nonce&#39; is part of the header, so it contributes to the block hash; this
lets you create identical blocks (same transactions and height), but with
different hashes.</p></td>
</tr>
<tr>
<td>StageTransactionsStream</td>
<td><a href="#cash.z.wallet.sdk.rpc.RawTransaction">RawTransaction</a> stream</td>
<td><a href="#cash.z.wallet.sdk.rpc.Empty">Empty</a></td>
<td><p>StageTransactionsStream stores the given transaction-height pairs in the
staging area until ApplyStaged() is called. Note that these transactions
are not returned by the production GetTransaction() gRPC until they
appear in a &#34;mined&#34; block (contained in the active blockchain presented
by the mock zcashd).</p></td>
</tr>
<tr>
<td>StageTransactions</td>
<td><a href="#cash.z.wallet.sdk.rpc.DarksideTransactionsURL">DarksideTransactionsURL</a></td>
<td><a href="#cash.z.wallet.sdk.rpc.Empty">Empty</a></td>
<td><p>StageTransactions is the same except the transactions are fetched from
the given url. They are all staged into the block at the given height.
Staging transactions to different heights requires multiple calls.</p></td>
</tr>
<tr>
<td>ApplyStaged</td>
<td><a href="#cash.z.wallet.sdk.rpc.DarksideHeight">DarksideHeight</a></td>
<td><a href="#cash.z.wallet.sdk.rpc.Empty">Empty</a></td>
<td><p>ApplyStaged iterates the list of blocks that were staged by the
StageBlocks*() gRPCs, in the order they were staged, and &#34;merges&#34; each
into the active, working blocks list that the mock zcashd is presenting
to lightwalletd. Even as each block is applied, the active list can&#39;t
have gaps; if the active block range is 1000-1006, and the staged block
range is 1003-1004, the resulting range is 1000-1004, with 1000-1002
unchanged, blocks 1003-1004 from the new range, and 1005-1006 dropped.
After merging all blocks, ApplyStaged() appends staged transactions (in
the order received) into each one&#39;s corresponding (by height) block
The staging area is then cleared.
The argument specifies the latest block height that mock zcashd reports
(i.e. what&#39;s returned by GetLatestBlock). Note that ApplyStaged() can
also be used to simply advance the latest block height presented by mock
zcashd. That is, there doesn&#39;t need to be anything in the staging area.</p></td>
</tr>
<tr>
<td>GetIncomingTransactions</td>
<td><a href="#cash.z.wallet.sdk.rpc.Empty">Empty</a></td>
<td><a href="#cash.z.wallet.sdk.rpc.RawTransaction">RawTransaction</a> stream</td>
<td><p>Calls to the production gRPC SendTransaction() store the transaction in
a separate area (not the staging area); this method returns all transactions
in this separate area, which is then cleared. The height returned
with each transaction is -1 (invalid) since these transactions haven&#39;t
been mined yet. The intention is that the transactions returned here can
then, for example, be given to StageTransactions() to get them &#34;mined&#34;
into a specified block on the next ApplyStaged().</p></td>
</tr>
<tr>
<td>ClearIncomingTransactions</td>
<td><a href="#cash.z.wallet.sdk.rpc.Empty">Empty</a></td>
<td><a href="#cash.z.wallet.sdk.rpc.Empty">Empty</a></td>
<td><p>Clear the incoming transaction pool.</p></td>
</tr>
</tbody>
</table>
<div class="file-heading">
<h2 id="service.proto">service.proto</h2><a href="#title">Top</a>
</div>
<p></p>
<h3 id="cash.z.wallet.sdk.rpc.Address">Address</h3>
<p></p>
<table class="field-table">
<thead>
<tr><td>Field</td><td>Type</td><td>Label</td><td>Description</td></tr>
</thead>
<tbody>
<tr>
<td>address</td>
<td><a href="#string">string</a></td>
<td></td>
<td><p> </p></td>
</tr>
</tbody>
</table>
<h3 id="cash.z.wallet.sdk.rpc.AddressList">AddressList</h3>
<p></p>
<table class="field-table">
<thead>
<tr><td>Field</td><td>Type</td><td>Label</td><td>Description</td></tr>
</thead>
<tbody>
<tr>
<td>addresses</td>
<td><a href="#string">string</a></td>
<td>repeated</td>
<td><p> </p></td>
</tr>
</tbody>
</table>
<h3 id="cash.z.wallet.sdk.rpc.Balance">Balance</h3>
<p></p>
<table class="field-table">
<thead>
<tr><td>Field</td><td>Type</td><td>Label</td><td>Description</td></tr>
</thead>
<tbody>
<tr>
<td>valueZat</td>
<td><a href="#int64">int64</a></td>
<td></td>
<td><p> </p></td>
</tr>
</tbody>
</table>
<h3 id="cash.z.wallet.sdk.rpc.BlockID">BlockID</h3>
<p>A BlockID message contains identifiers to select a block: a height or a</p><p>hash. Specification by hash is not implemented, but may be in the future.</p>
<table class="field-table">
<thead>
<tr><td>Field</td><td>Type</td><td>Label</td><td>Description</td></tr>
</thead>
<tbody>
<tr>
<td>height</td>
<td><a href="#uint64">uint64</a></td>
<td></td>
<td><p> </p></td>
</tr>
<tr>
<td>hash</td>
<td><a href="#bytes">bytes</a></td>
<td></td>
<td><p> </p></td>
</tr>
</tbody>
</table>
<h3 id="cash.z.wallet.sdk.rpc.BlockRange">BlockRange</h3>
<p>BlockRange specifies a series of blocks from start to end inclusive.</p><p>Both BlockIDs must be heights; specification by hash is not yet supported.</p>
<table class="field-table">
<thead>
<tr><td>Field</td><td>Type</td><td>Label</td><td>Description</td></tr>
</thead>
<tbody>
<tr>
<td>start</td>
<td><a href="#cash.z.wallet.sdk.rpc.BlockID">BlockID</a></td>
<td></td>
<td><p> </p></td>
</tr>
<tr>
<td>end</td>
<td><a href="#cash.z.wallet.sdk.rpc.BlockID">BlockID</a></td>
<td></td>
<td><p> </p></td>
</tr>
</tbody>
</table>
<h3 id="cash.z.wallet.sdk.rpc.ChainSpec">ChainSpec</h3>
<p>Chainspec is a placeholder to allow specification of a particular chain fork.</p>
<h3 id="cash.z.wallet.sdk.rpc.Duration">Duration</h3>
<p>Duration is currently used only for testing, so that the Ping rpc</p><p>can simulate a delay, to create many simultaneous connections. Units</p><p>are microseconds.</p>
<table class="field-table">
<thead>
<tr><td>Field</td><td>Type</td><td>Label</td><td>Description</td></tr>
</thead>
<tbody>
<tr>
<td>intervalUs</td>
<td><a href="#int64">int64</a></td>
<td></td>
<td><p> </p></td>
</tr>
</tbody>
</table>
<h3 id="cash.z.wallet.sdk.rpc.Empty">Empty</h3>
<p>Empty is for gRPCs that take no arguments, currently only GetLightdInfo.</p>
<h3 id="cash.z.wallet.sdk.rpc.Exclude">Exclude</h3>
<p></p>
<table class="field-table">
<thead>
<tr><td>Field</td><td>Type</td><td>Label</td><td>Description</td></tr>
</thead>
<tbody>
<tr>
<td>txid</td>
<td><a href="#bytes">bytes</a></td>
<td>repeated</td>
<td><p> </p></td>
</tr>
</tbody>
</table>
<h3 id="cash.z.wallet.sdk.rpc.GetAddressUtxosArg">GetAddressUtxosArg</h3>
<p></p>
<table class="field-table">
<thead>
<tr><td>Field</td><td>Type</td><td>Label</td><td>Description</td></tr>
</thead>
<tbody>
<tr>
<td>address</td>
<td><a href="#string">string</a></td>
<td></td>
<td><p> </p></td>
</tr>
<tr>
<td>startHeight</td>
<td><a href="#uint64">uint64</a></td>
<td></td>
<td><p> </p></td>
</tr>
<tr>
<td>maxEntries</td>
<td><a href="#uint32">uint32</a></td>
<td></td>
<td><p>zero means unlimited </p></td>
</tr>
</tbody>
</table>
<h3 id="cash.z.wallet.sdk.rpc.GetAddressUtxosReply">GetAddressUtxosReply</h3>
<p></p>
<table class="field-table">
<thead>
<tr><td>Field</td><td>Type</td><td>Label</td><td>Description</td></tr>
</thead>
<tbody>
<tr>
<td>txid</td>
<td><a href="#bytes">bytes</a></td>
<td></td>
<td><p> </p></td>
</tr>
<tr>
<td>index</td>
<td><a href="#int32">int32</a></td>
<td></td>
<td><p> </p></td>
</tr>
<tr>
<td>script</td>
<td><a href="#bytes">bytes</a></td>
<td></td>
<td><p> </p></td>
</tr>
<tr>
<td>valueZat</td>
<td><a href="#int64">int64</a></td>
<td></td>
<td><p> </p></td>
</tr>
<tr>
<td>height</td>
<td><a href="#uint64">uint64</a></td>
<td></td>
<td><p> </p></td>
</tr>
</tbody>
</table>
<h3 id="cash.z.wallet.sdk.rpc.GetAddressUtxosReplyList">GetAddressUtxosReplyList</h3>
<p></p>
<table class="field-table">
<thead>
<tr><td>Field</td><td>Type</td><td>Label</td><td>Description</td></tr>
</thead>
<tbody>
<tr>
<td>addressUtxos</td>
<td><a href="#cash.z.wallet.sdk.rpc.GetAddressUtxosReply">GetAddressUtxosReply</a></td>
<td>repeated</td>
<td><p> </p></td>
</tr>
</tbody>
</table>
<h3 id="cash.z.wallet.sdk.rpc.LightdInfo">LightdInfo</h3>
<p>LightdInfo returns various information about this lightwalletd instance</p><p>and the state of the blockchain.</p>
<table class="field-table">
<thead>
<tr><td>Field</td><td>Type</td><td>Label</td><td>Description</td></tr>
</thead>
<tbody>
<tr>
<td>version</td>
<td><a href="#string">string</a></td>
<td></td>
<td><p> </p></td>
</tr>
<tr>
<td>vendor</td>
<td><a href="#string">string</a></td>
<td></td>
<td><p> </p></td>
</tr>
<tr>
<td>taddrSupport</td>
<td><a href="#bool">bool</a></td>
<td></td>
<td><p>true </p></td>
</tr>
<tr>
<td>chainName</td>
<td><a href="#string">string</a></td>
<td></td>
<td><p>either &#34;main&#34; or &#34;test&#34; </p></td>
</tr>
<tr>
<td>saplingActivationHeight</td>
<td><a href="#uint64">uint64</a></td>
<td></td>
<td><p>depends on mainnet or testnet </p></td>
</tr>
<tr>
<td>consensusBranchId</td>
<td><a href="#string">string</a></td>
<td></td>
<td><p>protocol identifier, see consensus/upgrades.cpp </p></td>
</tr>
<tr>
<td>blockHeight</td>
<td><a href="#uint64">uint64</a></td>
<td></td>
<td><p>latest block on the best chain </p></td>
</tr>
<tr>
<td>gitCommit</td>
<td><a href="#string">string</a></td>
<td></td>
<td><p> </p></td>
</tr>
<tr>
<td>branch</td>
<td><a href="#string">string</a></td>
<td></td>
<td><p> </p></td>
</tr>
<tr>
<td>buildDate</td>
<td><a href="#string">string</a></td>
<td></td>
<td><p> </p></td>
</tr>
<tr>
<td>buildUser</td>
<td><a href="#string">string</a></td>
<td></td>
<td><p> </p></td>
</tr>
<tr>
<td>estimatedHeight</td>
<td><a href="#uint64">uint64</a></td>
<td></td>
<td><p>less than tip height if zcashd is syncing </p></td>
</tr>
<tr>
<td>zcashdBuild</td>
<td><a href="#string">string</a></td>
<td></td>
<td><p>example: &#34;v4.1.1-877212414&#34; </p></td>
</tr>
<tr>
<td>zcashdSubversion</td>
<td><a href="#string">string</a></td>
<td></td>
<td><p>example: &#34;/MagicBean:4.1.1/&#34; </p></td>
</tr>
</tbody>
</table>
<h3 id="cash.z.wallet.sdk.rpc.PingResponse">PingResponse</h3>
<p>PingResponse is used to indicate concurrency, how many Ping rpcs</p><p>are executing upon entry and upon exit (after the delay).</p><p>This rpc is used for testing only.</p>
<table class="field-table">
<thead>
<tr><td>Field</td><td>Type</td><td>Label</td><td>Description</td></tr>
</thead>
<tbody>
<tr>
<td>entry</td>
<td><a href="#int64">int64</a></td>
<td></td>
<td><p> </p></td>
</tr>
<tr>
<td>exit</td>
<td><a href="#int64">int64</a></td>
<td></td>
<td><p> </p></td>
</tr>
</tbody>
</table>
<h3 id="cash.z.wallet.sdk.rpc.RawTransaction">RawTransaction</h3>
<p>RawTransaction contains the complete transaction data. It also optionally includes </p><p>the block height in which the transaction was included.</p>
<table class="field-table">
<thead>
<tr><td>Field</td><td>Type</td><td>Label</td><td>Description</td></tr>
</thead>
<tbody>
<tr>
<td>data</td>
<td><a href="#bytes">bytes</a></td>
<td></td>
<td><p>exact data returned by Zcash &#39;getrawtransaction&#39; </p></td>
</tr>
<tr>
<td>height</td>
<td><a href="#uint64">uint64</a></td>
<td></td>
<td><p>height that the transaction was mined (or -1) </p></td>
</tr>
</tbody>
</table>
<h3 id="cash.z.wallet.sdk.rpc.SendResponse">SendResponse</h3>
<p>A SendResponse encodes an error code and a string. It is currently used</p><p>only by SendTransaction(). If error code is zero, the operation was</p><p>successful; if non-zero, it and the message specify the failure.</p>
<table class="field-table">
<thead>
<tr><td>Field</td><td>Type</td><td>Label</td><td>Description</td></tr>
</thead>
<tbody>
<tr>
<td>errorCode</td>
<td><a href="#int32">int32</a></td>
<td></td>
<td><p> </p></td>
</tr>
<tr>
<td>errorMessage</td>
<td><a href="#string">string</a></td>
<td></td>
<td><p> </p></td>
</tr>
</tbody>
</table>
<h3 id="cash.z.wallet.sdk.rpc.TransparentAddressBlockFilter">TransparentAddressBlockFilter</h3>
<p>TransparentAddressBlockFilter restricts the results to the given address</p><p>or block range.</p>
<table class="field-table">
<thead>
<tr><td>Field</td><td>Type</td><td>Label</td><td>Description</td></tr>
</thead>
<tbody>
<tr>
<td>address</td>
<td><a href="#string">string</a></td>
<td></td>
<td><p>t-address </p></td>
</tr>
<tr>
<td>range</td>
<td><a href="#cash.z.wallet.sdk.rpc.BlockRange">BlockRange</a></td>
<td></td>
<td><p>start, end heights </p></td>
</tr>
</tbody>
</table>
<h3 id="cash.z.wallet.sdk.rpc.TreeState">TreeState</h3>
<p>The TreeState is derived from the Zcash z_gettreestate rpc.</p>
<table class="field-table">
<thead>
<tr><td>Field</td><td>Type</td><td>Label</td><td>Description</td></tr>
</thead>
<tbody>
<tr>
<td>network</td>
<td><a href="#string">string</a></td>
<td></td>
<td><p>&#34;main&#34; or &#34;test&#34; </p></td>
</tr>
<tr>
<td>height</td>
<td><a href="#uint64">uint64</a></td>
<td></td>
<td><p> </p></td>
</tr>
<tr>
<td>hash</td>
<td><a href="#string">string</a></td>
<td></td>
<td><p>block id </p></td>
</tr>
<tr>
<td>time</td>
<td><a href="#uint32">uint32</a></td>
<td></td>
<td><p>Unix epoch time when the block was mined </p></td>
</tr>
<tr>
<td>tree</td>
<td><a href="#string">string</a></td>
<td></td>
<td><p>sapling commitment tree state </p></td>
</tr>
</tbody>
</table>
<h3 id="cash.z.wallet.sdk.rpc.TxFilter">TxFilter</h3>
<p>A TxFilter contains the information needed to identify a particular</p><p>transaction: either a block and an index, or a direct transaction hash.</p><p>Currently, only specification by hash is supported.</p>
<table class="field-table">
<thead>
<tr><td>Field</td><td>Type</td><td>Label</td><td>Description</td></tr>
</thead>
<tbody>
<tr>
<td>block</td>
<td><a href="#cash.z.wallet.sdk.rpc.BlockID">BlockID</a></td>
<td></td>
<td><p>block identifier, height or hash </p></td>
</tr>
<tr>
<td>index</td>
<td><a href="#uint64">uint64</a></td>
<td></td>
<td><p>index within the block </p></td>
</tr>
<tr>
<td>hash</td>
<td><a href="#bytes">bytes</a></td>
<td></td>
<td><p>transaction ID (hash, txid) </p></td>
</tr>
</tbody>
</table>
<h3 id="cash.z.wallet.sdk.rpc.CompactTxStreamer">CompactTxStreamer</h3>
<p></p>
<table class="enum-table">
<thead>
<tr><td>Method Name</td><td>Request Type</td><td>Response Type</td><td>Description</td></tr>
</thead>
<tbody>
<tr>
<td>GetLatestBlock</td>
<td><a href="#cash.z.wallet.sdk.rpc.ChainSpec">ChainSpec</a></td>
<td><a href="#cash.z.wallet.sdk.rpc.BlockID">BlockID</a></td>
<td><p>Return the height of the tip of the best chain</p></td>
</tr>
<tr>
<td>GetBlock</td>
<td><a href="#cash.z.wallet.sdk.rpc.BlockID">BlockID</a></td>
<td><a href="#cash.z.wallet.sdk.rpc.CompactBlock">CompactBlock</a></td>
<td><p>Return the compact block corresponding to the given block identifier</p></td>
</tr>
<tr>
<td>GetBlockRange</td>
<td><a href="#cash.z.wallet.sdk.rpc.BlockRange">BlockRange</a></td>
<td><a href="#cash.z.wallet.sdk.rpc.CompactBlock">CompactBlock</a> stream</td>
<td><p>Return a list of consecutive compact blocks</p></td>
</tr>
<tr>
<td>GetTransaction</td>
<td><a href="#cash.z.wallet.sdk.rpc.TxFilter">TxFilter</a></td>
<td><a href="#cash.z.wallet.sdk.rpc.RawTransaction">RawTransaction</a></td>
<td><p>Return the requested full (not compact) transaction (as from zcashd)</p></td>
</tr>
<tr>
<td>SendTransaction</td>
<td><a href="#cash.z.wallet.sdk.rpc.RawTransaction">RawTransaction</a></td>
<td><a href="#cash.z.wallet.sdk.rpc.SendResponse">SendResponse</a></td>
<td><p>Submit the given transaction to the Zcash network</p></td>
</tr>
<tr>
<td>GetTaddressTxids</td>
<td><a href="#cash.z.wallet.sdk.rpc.TransparentAddressBlockFilter">TransparentAddressBlockFilter</a></td>
<td><a href="#cash.z.wallet.sdk.rpc.RawTransaction">RawTransaction</a> stream</td>
<td><p>Return the txids corresponding to the given t-address within the given block range</p></td>
</tr>
<tr>
<td>GetTaddressBalance</td>
<td><a href="#cash.z.wallet.sdk.rpc.AddressList">AddressList</a></td>
<td><a href="#cash.z.wallet.sdk.rpc.Balance">Balance</a></td>
<td><p></p></td>
</tr>
<tr>
<td>GetTaddressBalanceStream</td>
<td><a href="#cash.z.wallet.sdk.rpc.Address">Address</a> stream</td>
<td><a href="#cash.z.wallet.sdk.rpc.Balance">Balance</a></td>
<td><p></p></td>
</tr>
<tr>
<td>GetMempoolTx</td>
<td><a href="#cash.z.wallet.sdk.rpc.Exclude">Exclude</a></td>
<td><a href="#cash.z.wallet.sdk.rpc.CompactTx">CompactTx</a> stream</td>
<td><p>Return the compact transactions currently in the mempool; the results
can be a few seconds out of date. If the Exclude list is empty, return
all transactions; otherwise return all *except* those in the Exclude list
(if any); this allows the client to avoid receiving transactions that it
already has (from an earlier call to this rpc). The transaction IDs in the
Exclude list can be shortened to any number of bytes to make the request
more bandwidth-efficient; if two or more transactions in the mempool
match a shortened txid, they are all sent (none is excluded). Transactions
in the exclude list that don&#39;t exist in the mempool are ignored.</p></td>
</tr>
<tr>
<td>GetTreeState</td>
<td><a href="#cash.z.wallet.sdk.rpc.BlockID">BlockID</a></td>
<td><a href="#cash.z.wallet.sdk.rpc.TreeState">TreeState</a></td>
<td><p>GetTreeState returns the note commitment tree state corresponding to the given block.
See section 3.7 of the Zcash protocol specification. It returns several other useful
values also (even though they can be obtained using GetBlock).
The block can be specified by either height or hash.</p></td>
</tr>
<tr>
<td>GetAddressUtxos</td>
<td><a href="#cash.z.wallet.sdk.rpc.GetAddressUtxosArg">GetAddressUtxosArg</a></td>
<td><a href="#cash.z.wallet.sdk.rpc.GetAddressUtxosReplyList">GetAddressUtxosReplyList</a></td>
<td><p></p></td>
</tr>
<tr>
<td>GetAddressUtxosStream</td>
<td><a href="#cash.z.wallet.sdk.rpc.GetAddressUtxosArg">GetAddressUtxosArg</a></td>
<td><a href="#cash.z.wallet.sdk.rpc.GetAddressUtxosReply">GetAddressUtxosReply</a> stream</td>
<td><p></p></td>
</tr>
<tr>
<td>GetLightdInfo</td>
<td><a href="#cash.z.wallet.sdk.rpc.Empty">Empty</a></td>
<td><a href="#cash.z.wallet.sdk.rpc.LightdInfo">LightdInfo</a></td>
<td><p>Return information about this lightwalletd instance and the blockchain</p></td>
</tr>
<tr>
<td>Ping</td>
<td><a href="#cash.z.wallet.sdk.rpc.Duration">Duration</a></td>
<td><a href="#cash.z.wallet.sdk.rpc.PingResponse">PingResponse</a></td>
<td><p>Testing-only</p></td>
</tr>
</tbody>
</table>
<h2 id="scalar-value-types">Scalar Value Types</h2>
<table class="scalar-value-types-table">
<thead>
<tr><td>.proto Type</td><td>Notes</td><td>C++</td><td>Java</td><td>Python</td><td>Go</td><td>C#</td><td>PHP</td><td>Ruby</td></tr>
</thead>
<tbody>
<tr id="double">
<td>double</td>
<td></td>
<td>double</td>
<td>double</td>
<td>float</td>
<td>float64</td>
<td>double</td>
<td>float</td>
<td>Float</td>
</tr>
<tr id="float">
<td>float</td>
<td></td>
<td>float</td>
<td>float</td>
<td>float</td>
<td>float32</td>
<td>float</td>
<td>float</td>
<td>Float</td>
</tr>
<tr id="int32">
<td>int32</td>
<td>Uses variable-length encoding. Inefficient for encoding negative numbers if your field is likely to have negative values, use sint32 instead.</td>
<td>int32</td>
<td>int</td>
<td>int</td>
<td>int32</td>
<td>int</td>
<td>integer</td>
<td>Bignum or Fixnum (as required)</td>
</tr>
<tr id="int64">
<td>int64</td>
<td>Uses variable-length encoding. Inefficient for encoding negative numbers if your field is likely to have negative values, use sint64 instead.</td>
<td>int64</td>
<td>long</td>
<td>int/long</td>
<td>int64</td>
<td>long</td>
<td>integer/string</td>
<td>Bignum</td>
</tr>
<tr id="uint32">
<td>uint32</td>
<td>Uses variable-length encoding.</td>
<td>uint32</td>
<td>int</td>
<td>int/long</td>
<td>uint32</td>
<td>uint</td>
<td>integer</td>
<td>Bignum or Fixnum (as required)</td>
</tr>
<tr id="uint64">
<td>uint64</td>
<td>Uses variable-length encoding.</td>
<td>uint64</td>
<td>long</td>
<td>int/long</td>
<td>uint64</td>
<td>ulong</td>
<td>integer/string</td>
<td>Bignum or Fixnum (as required)</td>
</tr>
<tr id="sint32">
<td>sint32</td>
<td>Uses variable-length encoding. Signed int value. These more efficiently encode negative numbers than regular int32s.</td>
<td>int32</td>
<td>int</td>
<td>int</td>
<td>int32</td>
<td>int</td>
<td>integer</td>
<td>Bignum or Fixnum (as required)</td>
</tr>
<tr id="sint64">
<td>sint64</td>
<td>Uses variable-length encoding. Signed int value. These more efficiently encode negative numbers than regular int64s.</td>
<td>int64</td>
<td>long</td>
<td>int/long</td>
<td>int64</td>
<td>long</td>
<td>integer/string</td>
<td>Bignum</td>
</tr>
<tr id="fixed32">
<td>fixed32</td>
<td>Always four bytes. More efficient than uint32 if values are often greater than 2^28.</td>
<td>uint32</td>
<td>int</td>
<td>int</td>
<td>uint32</td>
<td>uint</td>
<td>integer</td>
<td>Bignum or Fixnum (as required)</td>
</tr>
<tr id="fixed64">
<td>fixed64</td>
<td>Always eight bytes. More efficient than uint64 if values are often greater than 2^56.</td>
<td>uint64</td>
<td>long</td>
<td>int/long</td>
<td>uint64</td>
<td>ulong</td>
<td>integer/string</td>
<td>Bignum</td>
</tr>
<tr id="sfixed32">
<td>sfixed32</td>
<td>Always four bytes.</td>
<td>int32</td>
<td>int</td>
<td>int</td>
<td>int32</td>
<td>int</td>
<td>integer</td>
<td>Bignum or Fixnum (as required)</td>
</tr>
<tr id="sfixed64">
<td>sfixed64</td>
<td>Always eight bytes.</td>
<td>int64</td>
<td>long</td>
<td>int/long</td>
<td>int64</td>
<td>long</td>
<td>integer/string</td>
<td>Bignum</td>
</tr>
<tr id="bool">
<td>bool</td>
<td></td>
<td>bool</td>
<td>boolean</td>
<td>boolean</td>
<td>bool</td>
<td>bool</td>
<td>boolean</td>
<td>TrueClass/FalseClass</td>
</tr>
<tr id="string">
<td>string</td>
<td>A string must always contain UTF-8 encoded or 7-bit ASCII text.</td>
<td>string</td>
<td>String</td>
<td>str/unicode</td>
<td>string</td>
<td>string</td>
<td>string</td>
<td>String (UTF-8)</td>
</tr>
<tr id="bytes">
<td>bytes</td>
<td>May contain any arbitrary sequence of bytes.</td>
<td>string</td>
<td>ByteString</td>
<td>str</td>
<td>[]byte</td>
<td>ByteString</td>
<td>string</td>
<td>String (ASCII-8BIT)</td>
</tr>
</tbody>
</table>
</body>
</html>