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urbit/UTXO-select.md
timlucmiptev cdeeed9e16 working fee calculator
2021-05-26 18:30:16 -07:00

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utxo selection

Testing TXBUs with dummy data.

Creates dummy inputs and outputs. Builds a TX with them.

=btc -build-file %/lib/btc/hoon
=bwsl -build-file %/lib/btc-wallet-store/hoon
=u (utxo:btc [pos=0 (hexb:btc [wid=32 dat=0xc493.f6f1.4668.5f76.b44f.0c77.ca88.120c.b8bc.89f5.34fe.69b6.8288.27b9.74e6.8849]) height=3 value=0 ~])
=val0 200.000
=val1 500.000
=val2 30
=val3 235.000

=eny1 0v3uc.iuebi.5qilc.l8d87.c1k6n.7iksq.nkobs.8s5he.raq40.9ff0b.5tj3u.kjtg7.aq59e.hatv7.oioam.mlsr4.pqqcd.cnbjn.pnpi2.1m5rt.k4scg
=eny2 0v1gt.mc4ca.lfs0m.q1dal.lqobu.mmlbd.2umnp.lj9dr.4pf4s.pvclr.dps96.4a6i8.rt6n9.krp0r.11kqu.ckqe4.1tmat.gr754.463aj.a4b41.jj7qg
=w *walt:bwsl
=w w(bipt %84, confs 6)
=inputs ~[[u(value val0) %0 0] [u(value val1) %0 2] [u(value val2) %0 1] [u(value val3) %1 2]]
=outputs ~[[[%bech32 'bc1q59u5epktervh6fxqay2dlph0wxu9hjnx6v8n66'] value=200.100 ~] [[%bech32 'bc1qlwd7mw33uea5m8r2lsnsrkc7gp2qynrxsfxpfm'] value=200.000 ~]]

(~(single-random-draw sut:bwsl [w eny1 923 ~ 100 outputs]) inputs)
(~(single-random-draw sut:bwsl [w eny2 923 ~ 100 outputs]) inputs)

Above tests w 2 outputs, total fees with 2 inputs of 27.500. Gives:

  1. 500.000 input
  2. Inputs 0 and 3

Change/Dust/Fee

=btc -build-file %/lib/btc/hoon
=bwsl -build-file %/lib/btc-wallet-store/hoon
=eny1 0v3uc.iuebi.5qilc.l8d87.c1k6n.7iksq.nkobs.8s5he.raq40.9ff0b.5tj3u.kjtg7.aq59e.hatv7.oioam.mlsr4.pqqcd.cnbjn.pnpi2.1m5rt.k4scg
=last-block 923
=val1 500.000
=inval1 200.100
=inval2 200.000=inval1 200.100
=inval2 200.000
=u (utxo:btc [pos=0 (hexb:btc [wid=32 dat=0xc493.f6f1.4668.5f76.b44f.0c77.ca88.120c.b8bc.89f5.34fe.69b6.8288.27b9.74e6.8849]) height=3 value=0 ~])
=addr [%bech32 'bc1qcr8te4kr609gcawutmrza0j4xv80jy8z306fyu']
=addi [%.y %0 0 (sy ~[u(value val1)])]
=outputs ~[[[%bech32 'bc1q59u5epktervh6fxqay2dlph0wxu9hjnx6v8n66'] value=inval1 ~] [[%bech32 'bc1qlwd7mw33uea5m8r2lsnsrkc7gp2qynrxsfxpfm'] value=inval2 ~]]
=w *walt:bwsl
=w w(bipt %84, confs 6, wach (my ~[[addr addi]]))

=/  [utxbu=(unit txbu:bwsl) uchng=(unit sats:btc)]  ~(with-change sut:bwsl [w eny1 last-block ~ 10 outputs])
[vbytes=vbytes:(need utxbu) fee=(sub val1 (add inval1 (add inval2 (need uchng))))]