mirror of
https://github.com/ilyakooo0/urbit.git
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82 lines
2.2 KiB
Plaintext
82 lines
2.2 KiB
Plaintext
::
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::
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/- *btc-wallet-store
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/+ bip32, btc
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=, secp:crypto
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=+ ecc=secp256k1
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|%
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++ default-max-gap 20
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:: xpub
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:: wilt
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:: bipt: BIP44/49/84
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:: next: next index to generate address for in non-change/change accounts respectively
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:: scanned: whether the wallet's addresses have been checked for prior activity
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:: if unscanned, 'next' values won't be valid
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:: scan-to
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:: max-gap
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::
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++ walt
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|_ [=wilt =bipt =wach =nixt scanned=? scan-to=scon max-gap=@]
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+* this .
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::
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++ from-xpub
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|= [=xpub:btc scan-to=(unit scon) max-gap=(unit @)]
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^- _this
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%= this
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wilt (from-extended:bip32 (trip xpub))
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bipt (xpub-type:btc xpub)
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wach *^wach
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nixt [0 0]
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scanned %.n
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scan-to (fall scan-to *scon)
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max-gap (fall max-gap default-max-gap)
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==
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++ mk-address
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|= [=chyg =idx]
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^- address:btc
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=/ pubkey=@ux
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%- compress-point:ecc
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pub:(derive-public:(derive-public:wilt (@ chyg)) idx)
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?: ?=(%bip84 bipt)
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(need (encode-pubkey:bech32:btc %main pubkey))
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~|("legacy addresses not supported yet" !!)
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:: insert a new address; update "nixt" free address if this one was it
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::
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++ insert-address
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|= [a=address:btc =addi]
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^- _this
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=? nixt (is-nixt addi)
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(bump-nixt chyg.addi)
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this(wach (~(put by wach) a addi))
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:: update an address if it's in our wach (we're watching it already)
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::
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++ update-address
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|= [a=address:btc utxos=(set utxo:btc)]
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^- _this
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=/ adi=(unit addi)
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(~(get by wach) a)
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?~ adi this
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this(wach (~(put by wach) a u.adi(utxos utxos)))
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::
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++ is-nixt
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|= =addi ^- ?
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?: ?=(%0 chyg.addi)
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=(idx.addi p.nixt)
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=(idx.addi q.nixt)
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:: Returns the next unused index in the (non-)change account
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::
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++ bump-nixt
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|= =chyg ^- ^nixt
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=/ new-idx=idx (add 1 (get-nixt chyg))
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|- ?> (lte new-idx max-index)
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?. (~(has by wach) (mk-address chyg new-idx))
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(set-nixt chyg new-idx)
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$(new-idx +(new-idx))
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++ get-nixt
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|= =chyg ?:(?=(%0 chyg) p.nixt q.nixt)
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++ set-nixt
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|= [=chyg idx=@] ^- ^nixt
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?:(?=(%0 chyg) [idx q.nixt] [p.nixt idx])
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--
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--
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