+# Verus Specific Extensions - TBD Here
+
# Zcash Payment API
-## Overview
+This document has been relocated to https://zcash.readthedocs.io/en/latest/rtd_pages/payment_api.html
Zcash extends the Bitcoin Core API with new RPC calls to support private Zcash payments.
RPC calls by category:
* Accounting: z_getbalance, z_gettotalbalance
-* Addresses : z_getnewaddress, z_listaddresses, z_validateaddress
+* Addresses : z_getnewaddress, z_listaddresses, z_validateaddress, z_exportviewingkey, z_importviewingkey
* Keys : z_exportkey, z_importkey, z_exportwallet, z_importwallet
* Operation: z_getoperationresult, z_getoperationstatus, z_listoperationids
-* Payment : z_listreceivedbyaddress, z_sendmany, z_shieldcoinbase
+* Payment : z_listreceivedbyaddress, z_listunspent, z_sendmany, z_shieldcoinbase
RPC parameter conventions:
* taddr : Transparent address
* zaddr : Private address
* address : Accepts both private and transparent addresses.
-* amount : JSON format double-precision number with 1 ZC expressed as 1.00000000.
+* amount : JSON format decimal number with at most 8 digits of precision, with 1 ZEC expressed as 1.00000000.
* memo : Metadata expressed in hexadecimal format. Limited to 512 bytes, the current size of the memo field of a private transaction. Zero padding is automatic.
### Accounting
--- | --- | ---
z_getnewaddress | | Return a new zaddr for sending and receiving payments. The spending key for this zaddr will be added to the node’s wallet.<br><br>Output:<br>zN68D8hSs3...
z_listaddresses | | Returns a list of all the zaddrs in this node’s wallet for which you have a spending key.<br><br>Output:<br>{ [“z123…”, “z456...”, “z789...”] }
-z_validateaddress | zaddr | Return information about a given zaddr.<br><br>Output:<br>{"isvalid" : true,<br>"address" : "zcWsmq...",<br>"payingkey" : "f5bb3c...",<br>"transmissionkey" : "7a58c7...",<br>"ismine" : true}
+z_validateaddress | zaddr | Return information about a given zaddr.<br><br>Output:<br>{"isvalid" : true,<br>"address" : "zcWsmq...",<br>"type" : "sprout",<br>"payingkey" : "f5bb3c...",<br>"transmissionkey" : "7a58c7...",<br>"ismine" : true}
### Key Management
z_exportkey | zaddr | _Requires an unlocked wallet or an unencrypted wallet._<br><br>Return a zkey for a given zaddr belonging to the node’s wallet.<br><br>The key will be returned as a string formatted using Base58Check as described in the Zcash protocol spec.<br><br>Output:AKWUAkypwQjhZ6LLNaMuuuLcmZ6gt5UFyo8m3jGutvALmwZKLdR5
z_importkey | zkey [rescan=true] | _Wallet must be unlocked._<br><br>Add a zkey as returned by z_exportkey to a node's wallet.<br><br>The key should be formatted using Base58Check as described in the Zcash protocol spec.<br><br>Set rescan to true (the default) to rescan the entire local block database for transactions affecting any address or pubkey script in the wallet (including transactions affecting the newly-added address for this spending key).
z_exportwallet | filename | _Requires an unlocked wallet or an unencrypted wallet._<br><br>Creates or overwrites a file with taddr private keys and zaddr private keys in a human-readable format.<br><br>Filename is the file in which the wallet dump will be placed. May be prefaced by an absolute file path. An existing file with that name will be overwritten.<br><br>No value is returned but a JSON-RPC error will be reported if a failure occurred.
-z_importwallet | filename | _Requires an unlocked wallet or an unencrypted wallet._<br><br>Imports private keys from a file in wallet export file format (see z_exportwallet). These keys will be added to the keys currently in the wallet. This call may need to rescan all or parts of the block chain for transactions affecting the newly-added keys, which may take several minutes.<br><br>Filename is the file to import. The path is relative to komodod’s working directory.<br><br>No value is returned but a JSON-RPC error will be reported if a failure occurred.
+z_importwallet | filename | _Requires an unlocked wallet or an unencrypted wallet._<br><br>Imports private keys from a file in wallet export file format (see z_exportwallet). These keys will be added to the keys currently in the wallet. This call may need to rescan all or parts of the block chain for transactions affecting the newly-added keys, which may take several minutes.<br><br>Filename is the file to import. The path is relative to verusd’s working directory.<br><br>No value is returned but a JSON-RPC error will be reported if a failure occurred.
+z_exportviewingkey | zaddr | Reveals the viewing key corresponding to 'zaddr'. Then the z_importviewingkey can be used with this output.
+z_importviewingkey | vkey [rescan=whenkeyisnew] [startHeight=0] | Adds a viewing key (as returned by z_exportviewingkey) to your wallet.
+
### Payment
Command | Parameters | Description
--- | --- | ---
z_listreceivedbyaddress<br> | zaddr [minconf=1] | Return a list of amounts received by a zaddr belonging to the node’s wallet.<br><br>Optionally set the minimum number of confirmations which a received amount must have in order to be included in the result. Use 0 to count unconfirmed transactions.<br><br>Output:<br>[{<br>“txid”: “4a0f…”,<br>“amount”: 0.54,<br>“memo”:”F0FF…”,}, {...}, {...}<br>]
+z_listunspent | [minconf=1] [maxconf=9999999] [includeWatchonly=false] [zaddrs] | Returns array of unspent shielded notes with between minconf and maxconf (inclusive) confirmations.<br><br>Optionally filter to only include notes sent to specified addresses.<br><br>When minconf is 0, unspent notes with zero confirmations are returned, even though they are not immediately spendable.<br><br>Results are an array of Objects, each of which has: {txid, jsindex, jsoutindex, confirmations, address, amount, memo}
z_sendmany<br> | fromaddress amounts [minconf=1] [fee=0.0001] | _This is an Asynchronous RPC call_<br><br>Send funds from an address to multiple outputs. The address can be either a taddr or a zaddr.<br><br>Amounts is a list containing key/value pairs corresponding to the addresses and amount to pay. Each output address can be in taddr or zaddr format.<br><br>When sending to a zaddr, you also have the option of attaching a memo in hexadecimal format.<br><br>**NOTE:**When sending coinbase funds to a zaddr, the node's wallet does not allow any change. Put another way, spending a partial amount of a coinbase utxo is not allowed. This is not a consensus rule but a local wallet rule due to the current implementation of z_sendmany. In future, this rule may be removed.<br><br>Example of Outputs parameter:<br>[{“address”:”t123…”, “amount”:0.005},<br>,{“address”:”z010…”,”amount”:0.03, “memo”:”f508af…”}]<br><br>Optionally set the minimum number of confirmations which a private or transparent transaction must have in order to be used as an input. When sending from a zaddr, minconf must be greater than zero.<br><br>Optionally set a transaction fee, which by default is 0.0001 ZEC.<br><br>Any transparent change will be sent to a new transparent address. Any private change will be sent back to the zaddr being used as the source of funds.<br><br>Returns an operationid. You use the operationid value with z_getoperationstatus and z_getoperationresult to obtain the result of sending funds, which if successful, will be a txid.
z_shieldcoinbase<br> | fromaddress toaddress [fee=0.0001] [limit=50] | _This is an Asynchronous RPC call_<br><br>Shield transparent coinbase funds by sending to a shielded z address. Utxos selected for shielding will be locked. If there is an error, they are unlocked. The RPC call `listlockunspent` can be used to return a list of locked utxos.<br><br>The number of coinbase utxos selected for shielding can be set with the limit parameter, which has a default value of 50. If the parameter is set to 0, the number of utxos selected is limited by the `-mempooltxinputlimit` option. Any limit is constrained by a consensus rule defining a maximum transaction size of 100000 bytes. <br><br>The from address is a taddr or "*" for all taddrs belonging to the wallet. The to address is a zaddr. The default fee is 0.0001.<br><br>Returns an object containing an operationid which can be used with z_getoperationstatus and z_getoperationresult, along with key-value pairs regarding how many utxos are being shielded in this transaction and what remains to be shielded.
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