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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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12_3_Programming_Bitcoind_with_C.md
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@ -122,7 +122,7 @@ Is the UTXO large enough to pay out your transaction? If so, grab it!
} }
``` ```
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_amount);
json_decref(lu_data); 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_result);
json_decref(lu_response); 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) { 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 ### 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); 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"); lu_result = json_object_get(lu_response,"result");
char *changeaddress = strdup(json_string_value(lu_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. > **WARNING:** Here's another place that a subroutine would be really nice: to abstract out the whole RPC method initialization and call.