Signet Testnet3 Testnet4 ( getblocktemplate submitblock )

[sdfasdf]

Hello everyone,

I am currently working with the Signet testnets (testnet3 and testnet4) and I have a couple of questions regarding the use of the getblocktemplate and submitblock RPC methods.

Free RPC Nodes: Can anyone recommend any free RPC nodes or API services that support the Signet testnet? I’m looking for reliable options to test my implementation.
Usage of RPC Methods: I would appreciate any guidance or examples on how to properly use the getblocktemplate and submitblock methods in the context of the Signet testnet. Are there any specific parameters or configurations I should be aware of?
I am currently developing mining software and am focusing on the Signet testnets (testnet3 and testnet4). I have a few questions that I hope the community can help me with:
Thank you for your help!

Best regards,
Edit:
I Know constructing the block header and starting the mining process..
I Need free RPC nodes or API services getblocktemplate and submitblock

[achow101]

Neither testnet3 nor testnet4 are signets. Are you working with a custom signet, or with testnet3, or with testnet4?

[nc50lc]

Edit:
I Know constructing the block header and starting the mining process..
I Need free RPC nodes or API services getblocktemplate and submitblock

If you're speaking about "testnet4", you can easily setup your own node within an hour since its blockchain isn't that big and most blocks aren't full.
That's given that you have a good hardware.
Just start bitcoind and bitcoin-cli with --testnet4 arg when you start your node and issue commands.

The issue of public RPC nodes is they aren't willing to allow the public to use those types of commands (submitblock in your case) since it can ruin their node's ban score.
So most of them just blacklists such command.

Example, those commands are blacklisted in the public mainnet demo of this repo: github.com/janoside/btc-rpc-explorer
That repo's live demos used to have a working testnet and signet versions but for some reason, both are not accessible but AFAIK those are also blacklisted there.