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handle leading/trailing zeros correctly in hash-160

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timlucmiptev 2020-10-04 19:03:22 +03:00 committed by ixv
parent ffa34f53a8
commit 5b4619c1e8
2 changed files with 14 additions and 5 deletions
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12
bippy-scratch.md
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@ -59,8 +59,14 @@ That one starts with pubkey below. The following runs it through sha256 and ripe
Use `@uc` to make the Hash-160 into a BTC P2PKH address
```
=pubkey 0x2.5086.3ad6.4a87.ae8a.2fe8.3c1a.f1a8.403c.b53f.53e4.86d8.511d.ad8a.0488.7e5b.2352
(p2pkh:bip173 pubkey)
`@uc`(p2pkh:bip173 pubkey)
(hash-160:bip173 pubkey)
`@uc`(hash-160:bip173 pubkey)`@uc`(hash-160:bip173 pubkey)
```
### trailing zeros
Need to test with this because it shows need to input num bytes
```
0x3.f3c1.3839.3683.93e7.0caf.4148.4775.b805.312d.58be.d157.1308.3d27.5cf5.6998.0100
```
## Deprecated: `btc-address` Child Derivations
@ -91,3 +97,5 @@ Use `@uc` to make the Hash-160 into a BTC P2PKH address
0x2.b092.22c4.98c3.ab97.ce2b.6c4d.e68f.07d4.b031.589c.4d6b.bd31.7791.068f.7347.5201
0x2.5086.3ad6.4a87.ae8a.2fe8.3c1a.f1a8.403c.b53f.53e4.86d8.511d.ad8a.0488.7e5b.2352
0x2.3db4.d241.5936.c340.3de9.b0d9.e5e9.5dfb.43e6.0acd.aec9.0c9d.c17a.5c7c.26be.3150

7
lib/bip173.hoon
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@ -7,9 +7,10 @@
++ hash-160
|= pubkey=@ux
^- @ux
=/ sha (swp 3 (shax (swp 3 pubkey)))
%- ripemd-160:ripemd:crypto
[(met 3 sha) sha]
=, ripemd:crypto
:: use shay to preserve little endian length when there are trailing zeros
=/ sha256 (swp 3 (shay 33 (swp 3 pubkey)))
(ripemd-160 [32 sha256])
:: Converts an atom to a list of n-bit numbers, flop to preserve big-endian
::
++ to-n-bit