Hi all, I recently released Minsc, a high-level scripting language for expressing Bitcoin Script spending conditions using a simple and familiar syntax.
Minsc is based on the Miniscript Policy language, with additional features and syntactic sugar sprinkled on top, including variables, functions, infix notation, human-readable times and more. A live compiler (Minsc->Policy->Miniscript->Script) and documentation are available on the website: https://min.sc Source code (in Rust) is available on github: https://github.com/shesek/minsc Some example Minsc scripts: - A user and a 2FA service need to sign off, but after 90 days the user alone is enough pk(user_pk) && (9@pk(service_pk) || older(90 days)) - Traditional preimage-based HTLC $redeem = pk(A) && sha256(H); $refund = pk(B) && older(10); likely@$redeem || $refund - Liquid-like federated pegin with emergency recovery keys $federation = 4 of [ pk(A), pk(B), pk(C), pk(D), pk(E) ]; $recovery = 2 of [ pk(F), pk(G), pk(H) ]; $timeout = older(heightwise 2 weeks); likely@$federation || ($timeout && $recovery) - The BOLT #3 received HTLC policy fn htlc_received($revoke_pk, $local_pk, $remote_pk, $secret, $delay) { $success = pk($local_pk) && hash160($secret); $timeout = older($delay); pk($revoke_pk) || (pk($remote_pk) && ($success || $timeout)) } htlc_received(A, B, C, H, 3 hours) - 2FA where the user has a 2-of-2 setup and the service provider is a 3-of-4 federation fn two_factor($user, $provider, $delay) = $user && (likely@$provider || older($delay)); $user = pk(user_desktop) && pk(user_mobile); $providers = [ pk(P1), pk(P2), pk(P3), pk(P4) ]; two_factor($user, 3 of $providers, 4 months) - Easily add NSA backdoors to everything 🕵️🚪 _backdoor=pk(usgovt), _pk=pk, _older=older, _after=after, _sha256=sha256, _ripemd160=ripemd160; fn pk(x) = _pk(x) || _backdoor; fn older(x) = _older(x) || _backdoor; fn after(x) = _after(x) || _backdoor; fn sha256(x) = _sha256(x) || _backdoor; fn ripemd160(x) = _ripemd160(x) || _backdoor; (pk(A) && sha256(H)) || (pk(B) && older(10)) Feedback is appreciated! Nadav P.S Since every Miniscript Policy is also a valid Minsc expression, the min.sc web code editor UI could also be useful for experimenting with bare policies. You'll get syntax highlighting, parentheses matching, real-time compilation (in a web worker so the browser doesn't freeze) and syntax error reporting.
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