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16_6_Using_Other_Functions_in_Libwally.md
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# 16.6: Using Other Functions in Libwally # 16.6: Using Other Functions in Libwally
> **NOTE:** This is a draft in progress, so that I can get some feedback from early reviewers. It is not yet ready for learning. > :information_source: **NOTE:** This section has been recently added to the course and is an early draft that may still be awaiting review. Caveat reader.
Libwally is an extensive library that provides a considerable amount of wallet-related functionality, much of it not available through `bitcoin-cli`. Following is an overview of some functionality not previously covered in this chapter. Libwally is an extensive library that provides a considerable amount of wallet-related functionality, much of it not available through `bitcoin-cli`. Following is an overview of some functionality not previously covered in this chapter.
## Using Cryptographic Functions ## Use Cryptographic Functions
A number of cryptographic functions can be directly accessed from Libwally: A number of cryptographic functions can be directly accessed from Libwally:
@ -24,7 +24,7 @@ There are also HMAC functions for the two SHA hashes, which are used generate me
Additional functions cover PBKDF2 key derivation and elliptic-curve math. Additional functions cover PBKDF2 key derivation and elliptic-curve math.
## Using Address Functions ## Use Address Functions
Libwally contains a number of functions that can be used to import, export, and translate Bitcoin addresses. Libwally contains a number of functions that can be used to import, export, and translate Bitcoin addresses.
@ -43,7 +43,7 @@ Some relate to the wallet import format (WIF):
* `wally_wif_to_bytes` — Convert a WIF to a private key (in bytes) * `wally_wif_to_bytes` — Convert a WIF to a private key (in bytes)
* `wally_wif_to_public_key` — Derive a public key (in bytes) from a WIF * `wally_wif_to_public_key` — Derive a public key (in bytes) from a WIF
## Using BIP32 Functions ## Use BIP32 Functions
There are additional BIP32 HD-wallet functions, beyond what was covered in [§16.3: Using BIP32 in Libwally](16_3_Using_BIP32_in_Libwally.md). There are additional BIP32 HD-wallet functions, beyond what was covered in [§16.3: Using BIP32 in Libwally](16_3_Using_BIP32_in_Libwally.md).
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There are also numerous various depending on whether you want to allocate memory or have Libwally do the `_alloc` for you. There are also numerous various depending on whether you want to allocate memory or have Libwally do the `_alloc` for you.
## Using BIP38 Functions ## Use BIP38 Functions
[BIP38](https://github.com/bitcoin/bips/blob/master/bip-0038.mediawiki) allows for the creation of password-protected private key. We do not teach it because we consider inserting this sort of human factor into key management dangerous. See [#SmartCustody](https://www.smartcustody.com/index.html). [BIP38](https://github.com/bitcoin/bips/blob/master/bip-0038.mediawiki) allows for the creation of password-protected private key. We do not teach it because we consider inserting this sort of human factor into key management dangerous. See [#SmartCustody](https://www.smartcustody.com/index.html).
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* `bip38_from_private_key` — Encode a private key using BIP38 * `bip38_from_private_key` — Encode a private key using BIP38
* `bip38_to_private_key` — Decode a private key using BIP38 * `bip38_to_private_key` — Decode a private key using BIP38
## Using BIP39 Functions ## Use BIP39 Functions
A few BIP39 mnemonic-word functions were just overviewed in [§16.2: Using BIP39 in Libwally](16_2_Using_BIP39_in_Libwally.md): A few BIP39 mnemonic-word functions were just overviewed in [§16.2: Using BIP39 in Libwally](16_2_Using_BIP39_in_Libwally.md):
@ -71,11 +71,11 @@ A few BIP39 mnemonic-word functions were just overviewed in [§16.2: Using BIP39
* `bit39_get_word` — Retrieve a specific word from a language's word list * `bit39_get_word` — Retrieve a specific word from a language's word list
* `bip39_get_wordlist` — See a list of words for a language * `bip39_get_wordlist` — See a list of words for a language
## Using PSBT Functions ## Use PSBT Functions
Listings of most PSBT functions can be found in [16.4: Using PSBTs in Libwally](16_4_Using_PSBTs_in_Libwally.md). Listings of most PSBT functions can be found in [16.4: Using PSBTs in Libwally](16_4_Using_PSBTs_in_Libwally.md).
## Using Script Functions ## Use Script Functions
[§16.5: Using Scripts in Libwally](16_5_Using_Scripts_in_Libwally.md) just barely touched upon Libwally's Scripts functions. [§16.5: Using Scripts in Libwally](16_5_Using_Scripts_in_Libwally.md) just barely touched upon Libwally's Scripts functions.
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* `wally_witness_p2wpkh_from_sig` * `wally_witness_p2wpkh_from_sig`
* `wally_witness_program_from_bytes` * `wally_witness_program_from_bytes`
## Using Transaction Functions ## Use Transaction Functions
We also just barely touched upon the functions that can be used to create and convert functions in [§16.5](16_5_Using_Scripts_in_Libwally.md). We also just barely touched upon the functions that can be used to create and convert functions in [§16.5](16_5_Using_Scripts_in_Libwally.md).
@ -112,7 +112,7 @@ There are numerous informational functions, some of the more interesting of whic
There also are functions that affect a `wally_tx`, a `wally_tx_input`, a `wally_tx_output`, or a `wally_tx_witness_stack` and that create signatures. There also are functions that affect a `wally_tx`, a `wally_tx_input`, a `wally_tx_output`, or a `wally_tx_witness_stack` and that create signatures.
## Using Elements Functions ## Use Elements Functions
Libwally can be compiled to be used with Blockstream's Elements, which includes access to its assets functions. Libwally can be compiled to be used with Blockstream's Elements, which includes access to its assets functions.