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52 lines
1.2 KiB
Markdown
52 lines
1.2 KiB
Markdown
## NOTE
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The below requires norsyr's fix to `decompress-point` in order to work.
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## base58
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Converts a base58 zpub to hex
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```
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+bip84 "zpub6rFR7y4Q2AijBEqTUquhVz398htDFrtymD9xYYfG1m4wAcvPhXNfE3EfH1r1ADqtfSdVCToUG868RvUUkgDKf31mGDtKsAYz2oz2AGutZYs"
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```
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### btc-address
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**Import lib; optionally set up env**
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```
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=btca -build-file %/lib/btc-address/hoon
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=bip32 -build-file %/lib/bip32/hoon
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=xpub2 "xpub6DnWFmBQfQm1wxvKkCJjXwE6H4v8FTwUuhjDQ9ZpJnFDfhA8Dwmg71yPKyjUE93D2CB6MdnWNvGmwsb3fpd4oRJ2YcyMZoMpLU3BjpmQAny"
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```
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**Test child public key from xpub**
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```
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`@ux`(child-from-xpub:btca xpub2 0)
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`@ux`(child-from-xpub:btca xpub 1)
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(child-from-xpub:btca xpub (dec (bex 31)))
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:: should error as index is too high (hardened key range)
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(child-from-xpub:btca xpub (bex 31))
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```
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**Same, with Jose's bip32 library**
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```
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`@ux`(compress-point:secp256k1:secp:crypto pub:(derive-public:(from-extended:bip32 xpub2) 0))
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```
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**Test xpub parsing**
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```
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(parse-xpub:btca xpub)
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```
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**Test addition and ECC point checking**
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```
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=px (parse-xpub:btca xpub2)
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=pubk ?~ px ~ pubk.u.px
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(is-point:btca pubk)
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(pubkey-to-point:btca pubk)
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=index 256
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`@ux`(add (lsh 3 4 (big-endian-brap:btca pubk)) index)
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```
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**Test computing I**
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```
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(bind px |=(px=parsed-xpub:btca (compute-i:btca px 1)))
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```
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