46c357df7b
We've been wrongly representing large ints as BigInt, causing them to behave differently in the VM through builtins like 'serialise_data'. Indeed, we expect anything that fits in 8 bytes to be encoded as Major Type 0 or 1. But we were switching to encoding as Major type 6 (tagged, PosBigInt, NegBigInt) for much smaller values! Anything outside of the range [-2^32, 2^32-1] would be treated as big int (positive or negative). Why? Because we checked whether a value i would fit in an i64, and if it didn't we treated it as big int. But the reality is more subtle... Fortunately, Rust has i128 and the minicbor library implements TryFrom which enforces that the value fits in a range of [-2^64, 2^64 - 1], so we're back on track easily. |
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| README.md | ||
README.md
Untyped Plutus Core
A crate for working with untyped plutus core. It handles parsing, conversion between various forms, and flat encoding/decoding.