CHANGELOG

18 July 2024

Added directory 1_70 under trybuild_tests directory to ensure the tests pass and make sense for Minimum Supported Rust Version 1.70.
Wrote a build script scripts/build-ver-tests.rs.rs to copy the existing tests into the 1_70 directory.
Made sure that this build script is only ran during testing phase by trigger it using cargo eval scripts/build-ver-tests.rs.
GitHub Actions updated to run scripts/tests-all-features-1.70.sh, which is a bash script that wraps scripts/tests-all-features.sh to do testing on Rust version 1.70.

RTSecret<T, MEC> is now available. RTSecret<T, MEC> is the runtime version of Secret<T, MEC, EC>.
Substitute of the Secret<S> in secrecy crate is available as SecrecySecret<T> albeit with a different function signature of the method .expose_secret(...).
Following optimizations are done:

a. Given the type parameter MEC as an unsigned type-level integer, the second field of RTSecret<T, MEC> will be one of the following Rust's primitive unsigned integer types, u8, u16, u32 and u64, depending on the projected runtime value of MEC.

For example, if MEC is typenum::consts::U69, then the second field of RTSecret<T, MEC> will be of type u8. This optimization is done because if MEC at runtime is projected to a value, e.g. 69, and the exposure counter, which is the second field of the type, will never exceed the MEC's projected runtime value, then it only needs to be represented by an unsigned integer type (e.g. u8) that MEC's projected runtime value (e.g. 69) is minimally representable by (since 69 < u8::MAX = 255).

b. SecrecySecret<T> is the same size as T.