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16_1_Setting_Up_Libwally.md
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@ -4,7 +4,7 @@
This first section will explain how to download the Libwally C Library and get it working.
> :book: ***What is Libwally?*** Libwally is a library of primitives helpful for the creation of wallets that is cross-platform and cross-language, so that the same functions can be used everywhere. There are [extensive docs](https://wally.readthedocs.io/en/release_0.7.8/). It's made available as part of Blockstream's [Elements Project](https://github.com/ElementsProject).
> :book: ***What is Libwally?*** Libwally is a library of primitives helpful for the creation of wallets that is cross-platform and cross-language, so that the same functions can be used everywhere. There are [online docs](https://wally.readthedocs.io/en/release_0.7.8/). Libwally is made available as part of Blockstream's [Elements Project](https://github.com/ElementsProject).
## Installing Libwally
@ -13,7 +13,6 @@ As usual, you'll need some packages on your system:
$ sudo apt-get install git
$ sudo apt-get install dh-autoreconf
```
You can then download Libwally from its Git repo:
```
$ git clone https://github.com/ElementsProject/libwally-core
@ -33,7 +32,7 @@ Afterward you can finish your prep:
$ ./configure
$ make
```
You can then verify that tests are work:
You can then verify that tests are working:
```
$ make check
Making check in src
@ -104,9 +103,9 @@ $ ls /usr/include/wally*
/usr/include/wally_bip32.h /usr/include/wally_core.h /usr/include/wally.hpp /usr/include/wally_symmetric.h
/usr/include/wally_bip38.h /usr/include/wally_crypto.h /usr/include/wally_psbt.h /usr/include/wally_transaction.h
```
Fortunately, the file names largely match the sections in the [docs](https://wally.readthedocs.io/en/release_0.7.8/), so you should be able to include the correct files based on what you're doing, plus the ubiquitous `wally_core.h`.
Fortunately, the file names largely match the sections in the [docs](https://wally.readthedocs.io/en/release_0.7.8/), so you should be able to include the correct files based on what you're doing, after including the ubiquitous `wally_core.h`.
### Including the Libraries
### Linking the Libraries
You also will need to link appropriate libraries:
```
@ -141,7 +140,7 @@ Afterward you can run it:
$ ./testwally
Startup: 0
```
The "Startup" value is the return from `wally_init`. The `0` value may look discouraging, but that's what you want to see:
The "Startup" value is the return from `wally_init`. The `0` value may initially appear discouraging, but it's's what you want to see:
```
include/wally_core.h:#define WALLY_OK 0 /** Success */
```
@ -183,13 +182,13 @@ Testsuite summary for libsodium 1.0.18
...
$ sudo make install
```
We're not going to show how to use `libsodium` here, because this course will only use `libsodium` for one small (but crucial!) bit of entropy generation, but watch for it in the next section.
This course will only use `libsodium` for one small (but crucial!) bit of entropy generation, but watch for it in the next section.
## Summary: Setting Up Libwally
By installing the Libwally (and Libsodium) includes and libraries, you access a number of cryptographic and library functions, which can complement your RPC and ZMG libraries.
By installing the Libwally (and Libsodium) includes and libraries, you gain access to a number of cryptographic and wallet functions, which can complement your RPC and ZMG libraries (or your command-line `bitcoin-cli`).
So what does it do exactly? That's what the rest of this chapter is about.
So what precisely can you do now? That's what the rest of this chapter is about.
## What's Next?