mirror of
https://github.com/hanzoai/decimal.git
synced 2026-09-30 21:40:38 +00:00
zeekayandHanzo Dev
e7ede18d50
Parse stripped one leading sign and let big.Int.SetString read what was left. SetString accepts a sign too, so a second one was consumed there: "--5" parsed as POSITIVE five. On the values this package exists to hold that is a credit read as a charge, and it is silent — the caller gets a well-formed Decimal with no error to notice. The same gap had a second side. A bare "-", "+" or "." reached the intPart=="" → "0" fallback with no digits at all and parsed as a confident zero, indistinguishable from a real "0". Both come from delegating the grammar check to big.Int, which answers a different question than "is this a decimal literal". Checking the digits here answers that one, and it is the only check the grammar needs. Co-authored-by: Hanzo Dev <[email protected]>
decimal
Exact, arbitrary-precision fixed-point decimal for Go. A value is coefficient × 10⁻ˢᶜᵃˡᵉ
with a big.Int coefficient — no precision ceiling, no float, immutable.
Unlike int64/uint64 decimal & money libraries (which cap around 19 digits — about $9.20
at 18 decimals), this holds a fiat cent and an 18-decimal on-chain wei balance with equal
exactness. 0.1 + 0.2 is exactly 0.3.
d := decimal.MustParse("6.60")
cost := decimal.New(200, 0).Mul(d).Quo(decimal.New(1_000_000, 0), 18) // 200 tokens @ $6.60/1M
cost.String() // "0.00132" (never floored to 0)
The numeric core beneath hanzoai/money. Stdlib only.
BSD-3-Clause.