mirror of
https://github.com/ilyakooo0/urbit.git
synced 2024-12-30 10:27:11 +03:00
183 lines
3.6 KiB
Plaintext
183 lines
3.6 KiB
Plaintext
:: BIP174: PSBTs
|
|
:: https://github.com/bitcoin/bips/blob/master/bip-0174.mediawiki
|
|
::
|
|
/- sur=bitcoin
|
|
/+ bcu=bitcoin-utils
|
|
=, sur
|
|
=, bcu
|
|
|%
|
|
++ en
|
|
|%
|
|
++ globals
|
|
|= rawtx=hexb
|
|
^- map:psbt
|
|
:~ [[1 0x0] rawtx]
|
|
==
|
|
::
|
|
++ input
|
|
|= [only-witness=? i=in:psbt]
|
|
^- map:psbt
|
|
%+ weld
|
|
?: only-witness ~
|
|
~[[1^0x0 rawtx.i]]
|
|
:~ (witness-tx i)
|
|
(hdkey %input hdkey.i)
|
|
==
|
|
::
|
|
++ output
|
|
|= =out:psbt
|
|
^- map:psbt
|
|
?~ hk.out ~
|
|
:~ (hdkey %output u.hk.out)
|
|
==
|
|
::
|
|
++ witness-tx
|
|
|= i=in:psbt
|
|
^- keyval:psbt
|
|
:- [1 0x1]
|
|
%- cat:byt
|
|
:~ (flip:byt 8^value.utxo.i)
|
|
1^0x16
|
|
2^0x14
|
|
(hash-160 pubkey.hdkey.i)
|
|
==
|
|
::
|
|
++ hdkey
|
|
|= [=target:psbt h=^hdkey]
|
|
^- keyval:psbt
|
|
=/ typ=@ux
|
|
?- target
|
|
%input 0x6
|
|
%output 0x2
|
|
==
|
|
=/ coin-type=hexb
|
|
?- network.h
|
|
%main
|
|
1^0x0
|
|
%testnet
|
|
1^0x1
|
|
==
|
|
:- (cat:byt ~[1^typ pubkey.h])
|
|
%- cat:byt
|
|
:~ fprint.h
|
|
1^`@ux`bipt.h 3^0x80
|
|
coin-type 3^0x80
|
|
4^0x80
|
|
1^`@ux`chyg.h 3^0x0
|
|
(flip:byt 4^idx.h)
|
|
==
|
|
::
|
|
++ keyval-byts
|
|
|= kv=keyval:psbt
|
|
^- hexb
|
|
%- cat:byt
|
|
:~ 1^wid.key.kv
|
|
key.kv
|
|
1^wid.val.kv
|
|
val.kv
|
|
==
|
|
::
|
|
++ map-byts
|
|
|= m=map:psbt
|
|
^- (unit hexb)
|
|
?~ m ~
|
|
:- ~
|
|
%- cat:byt
|
|
(turn m keyval-byts)
|
|
--
|
|
++ base64
|
|
|= b=hexb
|
|
^- base64:psbt
|
|
%- en:base64:mimes:html
|
|
(flip:byt b)
|
|
:: +encode: make base64 cord of PSBT
|
|
:: - only-witness: don't include non-witness UTXO
|
|
::
|
|
++ encode
|
|
|= $: only-witness=?
|
|
rawtx=hexb
|
|
txid=hexb
|
|
inputs=(list in:psbt)
|
|
outputs=(list out:psbt)
|
|
==
|
|
^- base64:psbt
|
|
=/ sep=(unit hexb) `1^0x0
|
|
=/ final=(list (unit hexb))
|
|
%+ join sep
|
|
%+ turn
|
|
%- zing
|
|
:~ ~[(globals:en rawtx)]
|
|
(turn inputs (cury input:en only-witness))
|
|
(turn outputs output:en)
|
|
==
|
|
map-byts:en
|
|
%- base64:en
|
|
^- byts
|
|
%- cat:byt
|
|
%+ weld ~[[5 0x70.7362.74ff]]
|
|
(murn (snoc final sep) same)
|
|
::
|
|
++ parse
|
|
|= psbt-base64=cord
|
|
^- (list map:psbt)
|
|
=/ todo=hexb
|
|
(drop:byt 5 (to-byts psbt-base64))
|
|
=| acc=(list map:psbt)
|
|
=| m=map:psbt
|
|
|-
|
|
?: =(wid.todo 0)
|
|
(snoc acc m)
|
|
:: 0x0: map separator
|
|
::
|
|
?: =(1^0x0 (take:byt 1 todo))
|
|
$(acc (snoc acc m), m *map:psbt, todo (drop:byt 1 todo))
|
|
=^ kv todo (next-keyval todo)
|
|
$(m (snoc m kv))
|
|
:: +get-txid: extract txid from a valid PSBT
|
|
::
|
|
++ get-txid
|
|
|= psbt-base64=cord
|
|
^- hexb
|
|
=/ tx=hexb
|
|
%- raw-tx
|
|
%+ drop:byt 5
|
|
(to-byts psbt-base64)
|
|
%- flip:byt
|
|
(dsha256 tx)
|
|
:: +raw-tx: extract hex transaction
|
|
:: looks for key 0x0 in global map
|
|
:: crashes if tx not in hex
|
|
::
|
|
++ raw-tx
|
|
|= b=hexb
|
|
^- hexb
|
|
|-
|
|
?: =(wid.b 0) !!
|
|
?: =(1^0x0 (take:byt 1 b)) !!
|
|
=/ nk (next-keyval b)
|
|
?: =(0x0 dat.key.kv.nk)
|
|
val.kv.nk
|
|
$(b rest.nk)
|
|
:: +next-keyval: returns next key-val in a PSBT map
|
|
:: input first byte must be a map key length
|
|
::
|
|
++ next-keyval
|
|
|= b=hexb
|
|
^- [kv=keyval:psbt rest=hexb]
|
|
=/ klen dat:(take:byt 1 b)
|
|
=/ k (take:byt klen (drop:byt 1 b))
|
|
=/ vlen dat:(take:byt 1 (drop:byt (add 1 klen) b))
|
|
=/ v (take:byt vlen (drop:byt (add 2 klen) b))
|
|
?> ?&((gth wid.k 0) (gth wid.v 0))
|
|
:- [k v]
|
|
(drop:byt ;:(add 2 klen vlen) b)
|
|
::
|
|
++ to-byts
|
|
|= psbt-base64=cord
|
|
^- hexb
|
|
~| "Invalid PSBT"
|
|
=+ p=(de:base64:mimes:html psbt-base64)
|
|
?~ p !!
|
|
(flip:byt u.p)
|
|
--
|