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15_2_Programming_Bitcoind_with_C.md
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# 15.2: Programming Bitcoind in C with RPC Libraries # 15.2: Programming Bitcoind in C with RPC Libraries
> **NOTE:** This is a draft in progress, so that I can get some feedback from early reviewers. It is not yet ready for learning. > :information_source: **NOTE:** This section has been recently added to the course and is an early draft that may still be awaiting review. Caveat reader.
[§15.1](15_1_Accessing_Bitcoind_with_C.md) laid out the methodology for creating C programs using RPC and JSON libraries. We're now going to show the potential of those C libraries by laying out a simplistic, first cut of an actual Bitcoin program. [§15.1](15_1_Accessing_Bitcoind_with_C.md) laid out the methodology for creating C programs using RPC and JSON libraries. We're now going to show the potential of those C libraries by laying out a simplistic, first cut of an actual Bitcoin program.
## Planning for Your Code ## Plan for Your Code
This section will create a simplistic first cut version of `sendtoaddress`, which will allow a user to send money to an address as long as he has a big enough UTXO. Here's what we need to do: This section will create a simplistic first cut version of `sendtoaddress`, which will allow a user to send money to an address as long as he has a big enough UTXO. Here's what we need to do:
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7. Sign the transaction 7. Sign the transaction
8. Send the transaction 8. Send the transaction
### Planning for Your Future ### Plan for Your Future
Since this is your first functional C program, we're going to try and keep it simple (KISS). If we were producing an actual production program, we'd at least want to do the following: Since this is your first functional C program, we're going to try and keep it simple (KISS). If we were producing an actual production program, we'd at least want to do the following:
@ -30,7 +30,7 @@ Since this is your first functional C program, we're going to try and keep it si
If you want to continue to expand this example, addressing the inadequacies of this example program would be a great place to start. If you want to continue to expand this example, addressing the inadequacies of this example program would be a great place to start.
## Writing Your Transaction Software ## Write Your Transaction Software
Your now ready to undertake that plan step by step Your now ready to undertake that plan step by step
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``` ```
The entire code, with a _little_ more error-checking appears in the Appendix. The entire code, with a _little_ more error-checking appears in the Appendix.
## Testing Your Code ## Test Your Code
The complete code can be found in the [src directory](src/15_2_sendtoaddress.c). The complete code can be found in the [src directory](src/15_2_sendtoaddress.c).