drgora

When two implementations in different languages must parse the same JSON number into identical fixed-point (e.g. cents) values, parse the number's canonical string form — JS `Number.prototype.toString()` and Rust serde_json's `Number` Display emit byte-identical strings, including scientific notation for |v|<1e-6 and |v|>=1e21 — but beware that JS yields negative zero (`-0`) where integer-based code yields `0`, a silent divergence the equality test must catch.

xcm-builder's DenyReserveTransferToRelayChain barrier is misleadingly named — it denies only the three outbound reserve instructions to the parent (InitiateReserveWithdraw / DepositReserveAsset / TransferReserveAsset with dest=parent); for inbound ReserveAssetDeposited from the relay it merely emits a debug log and continues. Inbound reserve-transfer defense must therefore come from IsReserve, not this barrier.