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 2025-06-06 23:46:22 +00:00
Code Issues Releases Wiki Activity

updated with new examples just in case

Browse Source
This commit is contained in:
Shannon Appelcline 2020-06-19 10:48:23 -10:00 committed by GitHub
parent fc4f80f9b8
commit 07af202fa4
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 4 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
03_3__Interlude_Using_Command-Line_Variables.md
View File

@ -20,15 +20,17 @@ These commands clear the NEW_ADDRESS_1 variable, just to be sure, then fill it w
You can then use your shell's `echo` command to look at your (new) address:
```
$ echo $NEW_ADDRESS_1
n4cqjJE6fqcmeWpftygwPoKMMDva6BpyHf
mi25UrzHnvn3bpEfFCNqJhPWJn5b77a5NE
```
Because you have your address in a variable, you can now easily sign a message for that address, without worrying about mistyping the address. You'll of course save that signature into a variable too!
```
$ NEW_SIG_1=$(bitcoin-cli signmessage $NEW_ADDRESS_1 "Hello, World")
$ echo $NEW_SIG_1
IPYIzgj+Rg4bxDwCyoPiFiNNcxWHYxgVcklhmN8aB2XRRJqV731Xu9XkfZ6oxj+QGCRmTe80X81EpXtmGUpXOM4=
```
The rest of this tutorial will use this style of saving information to variables when it's practical.
_When is it not practical to use command-line variables?_ Command-line variables aren't practical if you need to use the information somewhere other than on the command line. For example, saving your signature may not actually be useful if you're just going to have to send it to someone else in an email. In addition, some future commands will output JSON objects instead of simple information, and variables can't be used to capture that information ... at least not without a _little_ more work.
> :book: ***When is it not practical to use command-line variables?*** Command-line variables aren't practical if you need to use the information somewhere other than on the command line. For example, saving your signature may not actually be useful if you're just going to have to send it to someone else in an email. In addition, some future commands will output JSON objects instead of simple information, and variables can't be used to capture that information ... at least not without a _little_ more work.
## Summary: Using Command-Line Variables