Where are functions: Add transaction, Sign transaction, Check transaction ...

[skylord56]

Hi,

I need to know where are the functions responsible to:
- Add transaction
- Sign the transaction by private key
- Check the transaction by nodes
- Add to mempool

In the bitcoin code please ?

What is the function reponsible to check if transaction can be added to block by all nodes, and if it's correct ?

Thank's

[1714105556]

1714105556

[1714105556]

1714105556

[1714105556]

1714105556

[achow101]

- Add transaction

Add transaction to what?

- Sign the transaction by private key

The code for the RPC command signrawtransactionwithwallet can be found here. Follow the code and it will take you to where transactions are actually signed. Starting with this command shows you the whole process.

- Check the transaction by nodes
- Add to mempool

Checking a transaction is done when it is being added to the mempool (the same functions are used for checking transactions in blocks). Just follow the code for AcceptToMemoryPool

[skylord56]

- Add transaction

Add transaction to what?

- Sign the transaction by private key

The code for the RPC command signrawtransactionwithwallet can be found here. Follow the code and it will take you to where transactions are actually signed. Starting with this command shows you the whole process.

- Check the transaction by nodes
- Add to mempool

Checking a transaction is done when it is being added to the mempool (the same functions are used for checking transactions in blocks). Just follow the code for AcceptToMemoryPool

By Add Transaction i mean: Create a new transaction.

Transaction is checked first and added to Mempool waiting for miners no ?

Many thank's

[achow101]

By Add Transaction i mean: Create a new transaction.

Follow the code for createrawtransaction. If you are interested in how the wallet works, then follow the code for sendtoaddress

Transaction is checked first and added to Mempool waiting for miners no ?

Yes. However the checking and adding to mempool are done as part of the same function. The AddToMemoryPool function will call the various checking functions for checking a transaction and then add it to the mempool at the end. It also performs its own checks for the additional conditions of adding a transaction to the mempool (e.g. conflicts, replacement, transaction fee, etc.).

[skylord56]

By Add Transaction i mean: Create a new transaction.

Follow the code for createrawtransaction. If you are interested in how the wallet works, then follow the code for sendtoaddress

Transaction is checked first and added to Mempool waiting for miners no ?

Yes. However the checking and adding to mempool are done as part of the same function. The AddToMemoryPool function will call the various checking functions for checking a transaction and then add it to the mempool at the end. It also performs its own checks for the additional conditions of adding a transaction to the mempool (e.g. conflicts, replacement, transaction fee, etc.).

First thank you for the explaignation, really appreciated

SignSignature is the one that sign a transaction with private key no ?

[achow101]

SignSignature is the one that sign a transaction with private key no ?

No, ProduceSignature is. SignSignature is not actually used outside of tests.