flywithu/Learning-Bitcoin-from-the-Command-Line
1
1
Fork 0
mirror of https://github.com/ChristopherA/Learning-Bitcoin-from-the-Command-Line.git synced 2025-06-07 16:06:26 +00:00
Code Issues Releases Wiki Activity

final sections

Browse Source
This commit is contained in:
Shannon Appelcline 2020-08-05 08:40:16 -10:00 committed by GitHub
parent c51165a67c
commit dc1a1edb1c
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 12 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
15_2_Programming_Bitcoind_with_C.md
View File

@ -241,7 +241,7 @@ params = json_array();
json_array_append(params,inputparams);
json_array_append(params,outputparams);
```
#### 6.4 Make the RPC Call
#### Step 6.4 Make the RPC Call
Use the normal method to create your RPC call:
```
@ -264,7 +264,7 @@ lu_result = json_object_get(lu_response,"result");
char *tx_rawhex = strdup(json_string_value(lu_result));
```
### 7. Sign the Transaction
### Step 7. Sign the Transaction
It's a lot easier to assign a simple parameter to a function. You just create a JSON array, then assign the parameter to the array:
```
@ -295,7 +295,7 @@ json_decref(lu_signature);
> :warning: ***WARNING:*** A real-world program would obviously carefully test the response of every RPC command to make sure there were no errors. That's especially true for `signrawtransaction`, because you might end up with a partially signed transaction. Worse, if you don't check the errors in the JSON object, you'll just see the `hex` and not realize that it's either unsigned or partially signed.
### 8. Send the Transaction
### Step 8. Send the Transaction
You can now send your transaction, using all of the previous techniques:
```
@ -322,7 +322,7 @@ printf("Txid: %s\n",tx_newid);
```
The entire code, with a _little_ more error-checking appears in the Appendix.
### Testing Your Code
## Testing Your Code
The complete code can be found in the [src directory](src/15_2_sendtoaddress.c).
@ -337,3 +337,11 @@ You can then use it to send funds to an address:
Txid: b93b19396f8baa37f5f701c7ca59d3128144c943af5294aeb48e3eb4c30fa9d2
```
You can see information on this transaction that we sent [here](https://live.blockcypher.com/btc-testnet/tx/b93b19396f8baa37f5f701c7ca59d3128144c943af5294aeb48e3eb4c30fa9d2/).
## Summary: Programming Bitcoind with C
With access to a C library, you can create much more fully featured programs than it was reasonable to do so with shell scripts. But, it can take a lot of work! Even at 316 lines of code, `sendtoaddress.c` doesn't cover nearly all of the intricacies requires to safely and intelligently transact bitcoins.
## What's Next?
Learn more about "Talking to Bitcoind with C" in [15.3: Receiving Bitcoind Notifications with C](15_3_Receiving_Bitcoind_Notifications_with_C.md).