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 _______________________________________________ bitcoin-dev mailing list bitcoin-dev@lists.linuxfoundation.org https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev
