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https://github.com/urbit/shrub.git
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287 lines
6.1 KiB
Plaintext
287 lines
6.1 KiB
Plaintext
:: bitcoin.hoon
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:: top-level Bitcoin constants
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:: expose BIP libraries
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::
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/- sur=bitcoin
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/+ bech32=bip-b173, pbt=bip-b174, bcu=bitcoin-utils
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=, sur
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=, bcu
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|%
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++ overhead-weight ^-(vbytes 11)
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++ input-weight
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|= =bipt
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^- vbytes
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?- bipt
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%44 148
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%49 91
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%84 68
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==
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++ output-weight
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|= =bipt
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^- vbytes
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?- bipt
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%44 34
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%49 32
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%84 31
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==
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::
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++ xpub-type
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|= =xpub
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^- [=bipt =network]
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=/ prefix=tape (scag 4 (trip xpub))
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?: =("tpub" prefix) [%44 %testnet]
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?: =("upub" prefix) [%49 %testnet]
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?: =("vpub" prefix) [%84 %testnet]
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?: =("xpub" prefix) [%44 %main]
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?: =("ypub" prefix) [%49 %main]
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?: =("zpub" prefix) [%84 %main]
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~|("invalid xpub: {<xpub>}" !!)
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::
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:: adr: address manipulation
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::
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++ adr
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|%
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++ get-bipt
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|= a=address
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^- bipt
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=/ spk=hexb (to-script-pubkey:adr a)
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?: =(25 wid.spk) %44
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?: =(23 wid.spk) %49
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?: =(22 wid.spk) %84
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?: =(34 wid.spk) %84
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~|("Invalid address" !!)
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::
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++ to-cord
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|= a=address ^- cord
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?: ?=([%base58 *] a)
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(scot %uc +.a)
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+.a
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::
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++ from-pubkey
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|= [=bipt =network pubkey=hexb]
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^- address
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?- bipt
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%44
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:- %base58
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=< ^-(@uc dat)
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%- cat:byt
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:- ?- network
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%main 1^0x0
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%testnet 1^0x6f
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==
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~[(hash-160 pubkey)]
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::
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%49
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:- %base58
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=< ^-(@uc dat)
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%- cat:byt
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:~ ?- network
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%main 1^0x5
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%testnet 1^0xc4
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==
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%- hash-160
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(cat:byt ~[2^0x14 (hash-160 pubkey)])
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==
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::
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%84
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:- %bech32
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(need (encode-pubkey:bech32 network pubkey))
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==
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::
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++ from-cord
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|= addrc=@t
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|^
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=/ addrt=tape (trip addrc)
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^- address
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?: (is-base58 addrt)
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[%base58 `@uc`(scan addrt fim:ag)]
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?: (is-bech32 addrt)
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[%bech32 addrc]
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~|("Invalid address: {<addrc>}" !!)
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::
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++ is-base58
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|= at=tape
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^- ?
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?| =("m" (scag 1 at))
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=("1" (scag 1 at))
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=("3" (scag 1 at))
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=("2" (scag 1 at))
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==
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::
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++ is-bech32
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|= at=tape
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^- ?
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?| =("bc1" (scag 3 at))
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=("tb1" (scag 3 at))
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==
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--
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::
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++ to-script-pubkey
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|= =address
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^- hexb
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?- -.address
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%bech32
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=+ h=(from-address:bech32 +.address)
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%- cat:byt
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:~ 1^0x0
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1^wid.h
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h
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==
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::
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%base58
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=/ h=hexb [21 `@ux`+.address]
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=+ lead-byt=dat:(take:byt 1 h)
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=/ version-network=[bipt network]
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?: =(0x0 lead-byt) [%44 %main]
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?: =(0x6f lead-byt) [%44 %testnet]
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?: =(0x5 lead-byt) [%49 %main]
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?: =(0xc4 lead-byt) [%49 %testnet]
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~|("Invalid base58 address: {<+.address>}" !!)
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%- cat:byt
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?: ?=(%44 -.version-network)
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:~ 3^0x76.a914
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(drop:byt 1 h)
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2^0x88ac
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==
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:~ 2^0xa914
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(drop:byt 1 h)
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1^0x87
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==
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==
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--
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::
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:: +txu: transaction utility core
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:: - primarily used for calculating txids
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:: - ignores signatures in inputs
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::
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++ txu
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|%
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++ en
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|%
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++ input
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|= i=input:tx
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^- hexb
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%- cat:byt
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:~ (flip:byt txid.i)
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(flip:byt 4^pos.i)
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?~ script-sig.i 1^0x0
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%- cat:byt
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~[(en:csiz wid.u.script-sig.i) u.script-sig.i]
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(flip:byt sequence.i)
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==
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::
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++ output
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|= o=output:tx
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^- hexb
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%- cat:byt
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:~ (flip:byt 8^value.o)
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1^wid.script-pubkey.o
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script-pubkey.o
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==
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--
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::
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++ de
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|%
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++ nversion
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|= b=hexb
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^- [nversion=@ud rest=hexb]
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:- dat:(flip:byt (take:byt 4 b))
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(drop:byt 4 b)
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::
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++ segwit
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|= b=hexb
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^- [segwit=(unit @ud) rest=hexb]
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?. =(1^0x0 (take:byt 1 b))
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[~ b]
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:- [~ dat:(take:byt 2 b)]
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(drop:byt 2 b)
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::
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++ script-sig
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|= b=hexb
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^- [sig=hexb rest=hexb]
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=^ siglen=hexb b (de:csiz b)
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:- (take:byt dat.siglen b)
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(drop:byt dat.siglen b)
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::
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++ sequence
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|= b=hexb
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^- [seq=hexb rest=hexb]
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[(flip:byt (take:byt 4 b)) (drop:byt 4 b)]
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::
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++ inputs
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|= b=hexb
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^- [is=(list input:tx) rest=hexb]
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|^
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=| acc=(list input:tx)
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=^ count b (dea:csiz b)
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|-
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?: =(0 count) [acc b]
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=^ i b (input b)
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$(acc (snoc acc i), count (dec count))
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::
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++ input
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|= b=hexb
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^- [i=input:tx rest=hexb]
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=/ txid (flip:byt (take:byt 32 b))
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=/ pos dat:(flip:byt (take:byt 4 (drop:byt 32 b)))
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=^ sig=hexb b (script-sig (drop:byt 36 b))
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=^ seq=hexb b (sequence b)
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:_ b
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[txid pos seq ?:((gth wid.sig 0) `sig ~) ~ 0]
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--
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::
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++ outputs
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|= b=hexb
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^- [os=(list output:tx) rest=hexb]
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=| acc=(list output:tx)
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=^ count b (dea:csiz b)
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|-
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?: =(0 count) [acc b]
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=/ value (flip:byt (take:byt 8 b))
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=^ scriptlen b (dea:csiz (drop:byt 8 b))
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%= $
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acc %+ snoc acc
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:- (take:byt scriptlen b)
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dat.value
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b (drop:byt scriptlen b)
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count (dec count)
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==
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--
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:: +basic-encode: encodes data in a format suitable for hashing
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::
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++ basic-encode
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|= =data:tx
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^- hexb
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%- cat:byt
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%- zing
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:~ ~[(flip:byt 4^nversion.data)]
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~[(en:csiz (lent is.data))]
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(turn is.data input:en)
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~[(en:csiz (lent os.data))]
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(turn os.data output:en)
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~[(flip:byt 4^locktime.data)]
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==
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++ get-id
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|= =data:tx
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^- hexb
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%- flip:byt
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%- dsha256
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(basic-encode data)
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::
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++ decode
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|= b=hexb
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^- data:tx
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=^ nversion b
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(nversion:de b)
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=^ segwit b
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(segwit:de b)
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=^ inputs b
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(inputs:de b)
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=^ outputs b
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(outputs:de b)
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=/ locktime=@ud
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dat:(take:byt 4 (flip:byt b))
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[inputs outputs locktime nversion segwit]
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--
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--
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