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Update 12_3_Programming_Bitcoind_with_C.md

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Shannon Appelcline 2017-06-27 12:03:44 -07:00 committed by GitHub
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12_3_Programming_Bitcoind_with_C.md
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@ -22,9 +22,10 @@ Since this is our first functional C program, we're going to try and keep it sim
1. Test and/or sanitize the inputs
2. Calculate a fee automatically
3. Combine multiple UTXOs if necessary
4. Watch for more errors in the `libbitcoinrpc` or `jansson` commands
5. Watch for errors in the RPC responses
3. Think logically about which vlid UTXO to use
4. Combine multiple UTXOs if necessary
5. Watch for more errors in the `libbitcoinrpc` or `jansson` commands
6. Watch for errors in the RPC responses
If you want to continue to expand this example, addressing the inadequacies of this example program would be a great place to start.
@ -108,6 +109,9 @@ for (i = 0 ; i < json_array_size(lu_result) ; i++) {
tx_value = json_real_value(lu_value);
```
Is the UTXO large enough to pay out your transaction? If so, grab it!
> **WARNING:** A real-world program would think more carefully about which UTXO to grab, based on size and other factors. It probably wouldn't just grab the first thing it saw that worked.
```
if (tx_value > tx_total) {