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dash/doc/instantsend.md
gladcow 0a6f47323b Remove dummy confirmations in RPC API and GUI for InstantSend transactions (#2040) 
* remove instandsenddepth option

* remove CInstantSend::GetConfirmations

* Explicit IXlocks processing in the code using GetDepthInMainChain

* remove dummy confirmations for IX locks

* remove unused constant

* Track IS status in TransactionStatus

* Highlight IS in tx list

* Customize confirmation icons for IS txes

* Fix issues:

- bring back removed comment;
- simplify 2 complex condition to ose `IsTrusted()` function only;
- rename `IsLockedIX` function to 'IsLockedByInstantSend`;

* Revert condition with IsTrusted()

* code style fix

* remove dummy confirmations from instantsend.md

* fix instantsend.md
2018-07-28 19:39:37 +03:00

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InstantSend Technical Information

InstantSend has been integrated into the Core Daemon in two ways:

  • "push" notifications (ZMQ and -instantsendnotify cmd-line/config option);
  • RPC commands.

ZMQ

When a "Transaction Lock" occurs the hash of the related transaction is broadcasted through ZMQ using both the zmqpubrawtxlock and zmqpubhashtxlock channels.

  • zmqpubrawtxlock: publishes the raw transaction when locked via InstantSend
  • zmqpubhashtxlock: publishes the transaction hash when locked via InstantSend

This mechanism has been integrated into Bitcore-Node-Dash which allows for notification to be broadcast through Insight API in one of two ways:

Command line option

When a wallet InstantSend transaction is successfully locked a shell command provided in this option is executed (%s in <cmd> is replaced by TxID):

-instantsendnotify=<cmd>

RPC

Details pertaining to an observed "Transaction Lock" can also be retrieved through RPC. There is a boolean field named instantlock which indicates whether a given transaction is locked via InstantSend. This field is present in the output of some wallet RPC commands e.g. listsinceblock, gettransaction etc. as well as in the output of some mempool RPC commands e.g. getmempoolentry and a couple of others like getrawmempool (for verbose=true only).