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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 1. Test and/or sanitize the inputs
2. Calculate a fee automatically 2. Calculate a fee automatically
3. Combine multiple UTXOs if necessary 3. Think logically about which vlid UTXO to use
4. Watch for more errors in the `libbitcoinrpc` or `jansson` commands 4. Combine multiple UTXOs if necessary
5. Watch for errors in the RPC responses 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. 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); tx_value = json_real_value(lu_value);
``` ```
Is the UTXO large enough to pay out your transaction? If so, grab it! 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) { if (tx_value > tx_total) {