2020-10-30 14:45:38 +03:00
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# btc-wallet-* Scratch Code
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## xpub
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```
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2020-10-31 12:41:00 +03:00
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=xpub1 'zpub6r8dKyWJ31XF6n69KKeEwLjVC5ruqAbiJ4QCqLsrV36Mvx9WEjUaiPNPGFLHNCCqgCdy6iZC8ZgHsm6a1AUTVBMVbKGemNcWFcwBGSjJKbD'
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=xpub2 'xpub6D7yaZieZEeG617UcKXDhbsDeso6bmxSAiGWkvkASoiwcjaRtrH5HeNRnDT25s7zmxYzj6MtFe32dVqcf9YcBKKgn9THHjwn2uSjkvobK4e'
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2020-10-30 14:45:38 +03:00
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=bl -build-file %/lib/btc-wallet-store/hoon
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```
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### add
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```
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:btc-wallet-store|action [%add-wallet xpub ~ ~]
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```
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### get address at indices
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```
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=walt1 (from-xpub:walt:bl xpub1 ~ ~)
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(get-address:walt1 %0 0)
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```
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2020-10-31 12:41:00 +03:00
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### update address data
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```
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=walt1 (from-xpub:walt:bl xpub1 ~ ~)
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2020-10-31 14:25:32 +03:00
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(mk-address:walt1 %0 0)
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:: gives bc1q0adfj7ur750hjwufzzlfj5ytqzsnd7fz9fjuzc
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=walt1 (insert-address:walt1 [%bech32 'bc1q0adfj7ur750hjwufzzlfj5ytqzsnd7fz9fjuzc'] [%0 0 ~])
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nixt:walt1
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:: gives [p=1 q=0] (nixt updated since it was 0)
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=walt1 (insert-address:walt1 [%bech32 'bc1qa5jcdww8u8493zttjjf6q5wu89e6knpvmsh7x4'] [%0 2 ~])
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nixt:walt1
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:: gives [p=1 q=0] (no update)
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=walt1 (insert-address:walt1 [%bech32 'bc1qvqrdh8suyv63ntaa0d7hmcamavv8283sngh6e5'] [%0 1 ~])
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nixt:walt1
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:: gives [p=3 q=0] (skips index 2, since already a used address there)
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2020-10-31 12:41:00 +03:00
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```
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## Algos
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Insert an address
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1. send wallet an address that we KNOW is in the wallet
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2. include the address's index
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Scan addresses. (map xpub (pair list list))
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outgoing wire is /scan/xpub/change/index
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- keep list of whether we've heard back on an address `(list (unit used))`
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- every time we get a response
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- insert the address into the wallet if it's used
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- check whether (lent (murn l)) == max-gap
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- if it does, run lien--if any used, continue
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- if none used, the wallet is scanned.
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2020-10-30 14:45:38 +03:00
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## scratch code, refactor
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2020-10-31 12:41:00 +03:00
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++ update-utxos
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2020-10-30 14:45:38 +03:00
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|= [a=address:btc us=(set utxo)]
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^- (quip card _state)
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=/ xpubs=(list tape)
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%~ tap in
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~(key by walts.state)
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|- ?~ xpubs `state
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=/ w=walt (~(got by walts.state) i.xpubs)
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?: (~(has by wach.w) a)
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%: send-address-update
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i.xpubs
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(update-wallet w a us)
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a
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us
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==
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$(xpubs t.xpubs)
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::
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++ update-wallet
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|= [w=walt a=address:btc us=(set utxo)]
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^- walt
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=/ curr-addi=addi
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(~(got by wach.w) a)
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w(wach (~(put by wach.w) a curr-addi(used %.y, utxos us)))
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::
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++ send-address-update
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|= [xpub=tape =walt a=address:btc us=(set utxo)]
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^- (quip card _state)
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:_ state(walts (~(put by walts.state) xpub walt))
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~[[%give %fact ~[/wallets] %btc-wallet-store-update !>([%address a us])]]
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::
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++ add-wallet
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|= [xpub=tape scan-to=(unit scon) max-gap=(unit @)]
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^- (quip card _state)
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?: (~(has by walts.state) xpub)
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~& >>> "xpub already imported"
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`state
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=/ wallet=walt
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:* (from-extended:bip32 xpub)
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(xpub-type:btc xpub)
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*wach
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[0 0]
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%.n
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(fall scan-to *scon)
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(fall max-gap max-gap.state)
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==
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`state(walts (~(put by walts.state) xpub wallet))
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