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 2025-07-22 17:35:21 +00:00
Code Issues Releases Wiki Activity

Merge pull request #267 from officer47p/parsa/update/curl-params-for-createnewaddress-command

Browse Source 
parsa/update/curl-params-for-createnewaddress-command
This commit is contained in:
Shannon Appelcline 2021-07-14 13:33:33 -10:00 committed by GitHub
commit 59e7dcbe6c
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 9 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
04_4__Interlude_Using_Curl.md
View File

@ -111,9 +111,11 @@ Here's what some parameter arrays will look like:
You can now send your first `curl` command by accessing the `getmininginfo` RPC:
```
$ curl --user StandUp:8eaf562eaf45c33c3328bc66008f2dd1 --data-binary '{"jsonrpc": "1.0", "id":"curltest", "method": "getmininginfo", "params": [] }' -H 'content-type: text/plain;' http://127.0.0.1:18332/
{"result":{"blocks":1772428,"difficulty":10178811.40698772,"networkhashps":91963587385939.06,"pooledtx":61,"chain":"test","warnings":"Warning: unknown new rules activated (versionbit 28)"},"error":null,"id":"curltest"}```
Note that we provided the method, `getmininginfo`, and the parameter, `[]`, but that everything else was the standard `curl` command line.
{"result":{"blocks":1772428,"difficulty":10178811.40698772,"networkhashps":91963587385939.06,"pooledtx":61,"chain":"test","warnings":"Warning: unknown new rules activated (versionbit 28)"},"error":null,"id":"curltest"}
```
Note that we provided the method, `getmininginfo`, and the parameter, `[]`, but that everything else was the standard `curl` command line.
> **WARNING:** If you get a result like "Failed to connect to 127.0.0.1 port 8332: Connection refused", be sure that a line like `rpcallowip=127.0.0.1` is in your ~/.bitcoin/bitcoin.conf. If things still don't work, be sure that you're allowing access to port 18332 (or 8332) from localhost. Our standard setup from [Chapter Two: Creating a Bitcoin-Core VPS](02_0_Setting_Up_a_Bitcoin-Core_VPS.md) should do all of this.
The result is another JSON array, which is unfortunately ugly to read if you're using `curl` by hand. Fortunately, you can clean it up simply by piping it through `jq`:
@ -218,17 +220,19 @@ This is almost exactly the same output that you receive when you type `bitcoin-c
After you know where your funds are, the next step in crafting a transaction is to get a change address. By now you've probably got the hang of this, and you know that for simple RPC commands, all you need to do is adjust the `method` is the `curl` command:
```
$ curl --user StandUp:8eaf562eaf45c33c3328bc66008f2dd1 --data-binary '{"jsonrpc": "1.0", "id":"curltest", "method": "getrawchangeaddress", "params": ["legacy"] }' -H 'content-type: text/plain;' http://127.0.0.1:18332/ | jq -r '.'
$ curl --user StandUp:8eaf562eaf45c33c3328bc66008f2dd1 --data-binary '{"jsonrpc": "1.0", "id":"curltest", "method": "getrawchangeaddress", "params": ["", "legacy"] }' -H 'content-type: text/plain;' http://127.0.0.1:18332/ | jq -r '.'
{
"result": "mrSqN37TPs89GcidSZTvXmMzjxoJZ6RKoz",
"error": null,
"id": "curltest"
}
```
> **WARNING:** The parameters order is important when you are sending RPC commands using curl. For example here, if we had sent `"params": ["legacy"]` instead of `"params": ["", "legacy"]`, we would get a `bech32` address with a label of `"legacy"` instead of a `legacy` address, so pay attention to the order.
At this point, we can even revert to our standard practice of saving results to variables with additional help from `jq`:
```
$ changeaddress=$(curl --user StandUp:8eaf562eaf45c33c3328bc66008f2dd1 --data-binary '{"jsonrpc": "1.0", "id":"curltest", "method": "getrawchangeaddress", "params": ["legacy"] }' -H 'content-type: text/plain;' http://127.0.0.1:18332/ | jq -r '.result')
$ changeaddress=$(curl --user StandUp:8eaf562eaf45c33c3328bc66008f2dd1 --data-binary '{"jsonrpc": "1.0", "id":"curltest", "method": "getrawchangeaddress", "params": ["", "legacy"] }' -H 'content-type: text/plain;' http://127.0.0.1:18332/ | jq -r '.result')
$ echo $changeaddress
mqdfnjgWr2r3sCCeuTDfe8fJ1CnycF2e6R
```