DSL for experimenting with contracts

Implementation
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8

We currently use Rust macros at GitHub - BitVM/rust-bitcoin-script at script_macro to work with Rust Bitcoin’s Script. New scripts and opcodes can be composed and there is some syntactic sugar like loops. Looks like this:

fn script_from_func() -> ScriptBuf {
    return script! { OP_ADD };
}

let script = script! {
    for i in 0..3 {
        for k in 0..(3 as u32) {
        OP_ADD
        if k == i {
            OP_SUB
        } else {
            script_from_func
        }
        { i * 42 }
        { k + 42}
        }
    }
    OP_ADD
};
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