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Update 12_3_Programming_Bitcoind_with_C.md

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Shannon Appelcline 2017-06-21 11:13:11 -07:00 committed by GitHub
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1 changed files with 6 additions and 6 deletions
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12_3_Programming_Bitcoind_with_C.md
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@ -115,14 +115,14 @@ Is the UTXO large enough to pay out your transaction? If so, grab it!
tx_vout = json_integer_value(lu_vout);
json_decref(lu_amount);
json_decref(lu_txid);
json_decref(lu_txid);
json_decref(lu_vout);
json_decref(lu_data);
json_decref(lu_data);
break;
}
```
Make sure to clean things up as you go through failed loops:
Make sure to clean things up as you go through failed loops and then when you finish the loops:
```
json_decref(lu_amount);
json_decref(lu_data);
@ -132,7 +132,7 @@ Make sure to clean things up as you go through failed loops:
json_decref(lu_result);
json_decref(lu_response);
```
If you didn't find any large-enough UTXOs, you'll have to report that sad fact to the user ... and perhaps suggest that they should use a better sending program that will correctly merge UTXOs.
If you didn't find any large-enough UTXOs, you'll have to report that sad fact to the user ... and perhaps suggest that they should use a better program that will correctly merge UTXOs.
```
if (!tx_id) {
@ -147,7 +147,7 @@ printf("We are using txid %s with vout %i\n",tx_id,tx_vout);
### 4. Create a Change Address
Repeat this methodology to get a change address:
Repeat the standard RPC-lookup methodology to get a change address:
```
rpc_method = bitcoinrpc_method_init(BITCOINRPC_METHOD_GETRAWCHANGEADDRESS);
@ -172,7 +172,7 @@ lu_response = bitcoinrpc_resp_get (btcresponse);
lu_result = json_object_get(lu_response,"result");
char *changeaddress = strdup(json_string_value(lu_result));
```
The only difference is what in particular we extract from our JSON object.
The only difference is in what particular information we extract from our JSON object.
> **WARNING:** Here's another place that a subroutine would be really nice: to abstract out the whole RPC method initialization and call.