From: "Johan Torås Halseth" <johanth@gmail•com>
To: Bitcoin Protocol Discussion <bitcoin-dev@lists•linuxfoundation.org>
Subject: [bitcoin-dev] MATT: [demo] Optimistic execution of arbitrary programs
Date: Fri, 29 Sep 2023 15:14:25 +0200 [thread overview]
Message-ID: <CAD3i26BAoN06rR=BnvNDDBCyMkKTcROGK7zaC784XV5FWYM+5w@mail.gmail.com> (raw)
Hi, all!
I've been working on an implementation of the original MATT challenge
protocol[0], with a detailed description of how we go from a
"high-level arbitrary program" to something that can be verified
on-chain in Bitcoin Script.
You can find the write-up here, which also includes instructions of
how to run the code and inspect the transactions using a local block
explorer: https://github.com/halseth/mattlab/blob/main/docs/challenge.md
TLDR; Using the proposed opcode OP_CHECKCONTRACTVERIFY and OP_CAT, we
show to trace execution of the program `multiply` [1] and challenge
this computation in O(n logn) on-chain transactions:
func multiply(x int) int {
i := 0
while {
if i < 8 {
x = x + x
i = i + 1
} else {
break
}
}
return x
}
Next steps would be to make this a generic framework with tools to
automatically compile arbitrary high-level programs down to
MATT-compatible Bitcoin Scripts.
All feedback appreciated!
- Johan
[0] https://lists.linuxfoundation.org/pipermail/bitcoin-dev/2022-November/021182.html
[1] https://lists.linuxfoundation.org/pipermail/bitcoin-dev/2022-November/021205.html
next reply other threads:[~2023-09-29 13:14 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-09-29 13:14 Johan Torås Halseth [this message]
2023-10-02 15:10 ` Anthony Towns
2023-10-03 7:53 ` Johan Torås Halseth
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