Php and Zcashd Optimization ideas (operation id)

Technology
1

Hello Dear Zcash Community,

I’m behind a problem since some days,
I develop an application which use php mainly(curl for request to zcash-cli, …) and zcash cli for linux.

Before start :

When a transaction are made, there is a ‘operation id’ number for get later result and error(or not) of transaction

The problems are:

  • Operation id have limit of call ( one or two) and disappear really fast of zcash node(still connected and synchronized)
  • Don’t stay in memory… (impossible to get an history for later verification)

My questions is : How to efficiently make and check a transaction on zcash mainnet network and php and bypass problem above ?
(Maybe in zcash.conf)

I’m really in doubt about this situation, I need, after making transaction, a way for check transaction multiple time,(if possible, without operation id) and stay in memory but How ?!!!

Thanks for your help
Cordially

2

Maybe the command line option walletnotify could help you. It will make zcashd execute a script when a transaction that affects your wallet occurs.

1 Like
3

Thanks for your answer,

I didn’t find walletnotify command on https://zcash-rpc.github.io !!

4

It was added to bitcoin but I can’t find it on any of the bitcoincore rpc call lists as well and I don’t run bitcoind to check -help

5

It is not a rpc but a command line argument when you launch zcashd.

2 Likes
6

expanding @hanh 's answer :

walletnotify example usage

in your zcash.conf

walletnotify=/home/myapp/handle_transaction.sh %s

in the above case handle_transaction.sh is a shell script that will be executed when you receive or send a transaction.
%s will have the tx id. ( I am not sure if it will called exactly once or not ! ). Please do some further research.

1 Like
7

It gets called twice - first time is when the transaction is received, second time is when it gets the first confirmation (ie: mined)

It also gets called when your node is ‘catching up’, when its been off for a while and is downloading blocks and the new blocks contain transactions for your wallet.

3 Likes
8

Finally,

I used this method : z_getoperationstatus - Zcash 4.5.1-1 RPC Docs who remain in memory until zcash node is shut down!