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Arguments · 7

1. #1safemath
2. #2gnomod.toml
3. #3module = "gno.land/p/samcrew/launchpad/safemath/v1" gno = "0.9"
4. #4safemath.gno
5. #5// Package safemath is checked, non-negative int64 arithmetic for launchpad amounts. package safemath import "math/bits" const ( MaxInt64 int64 = 1<<63 - 1 BPSDenominator int64 = 10_000 ) func mustNonNegative(v int64) { if v < 0 { panic("launchpad/safemath: negative value") } } func Add(a, b int64) int64 { mustNonNegative(a) mustNonNegative(b) if a > MaxInt64-b { panic("launchpad/safemath: overflow") } return a + b } func Sub(a, b int64) int64 { mustNonNegative(a) mustNonNegative(b) if b > a { panic("launchpad/safemath: underflow") } return a - b } func Mul(a, b int64) int64 { mustNonNegative(a) mustNonNegative(b) if a != 0 && b > MaxInt64/a { panic("launchpad/safemath: overflow") } return a * b } // MulDiv returns floor(a*b/d) using a 128-bit intermediate. func MulDiv(a, b, d int64) int64 { q, _ := mulDivRem(a, b, d) return q } // MulDivUp returns ceil(a*b/d) using a 128-bit intermediate. func MulDivUp(a, b, d int64) int64 { q, rem := mulDivRem(a, b, d) if rem { if q == MaxInt64 { panic("launchpad/safemath: overflow") } q++ } return q } func mulDivRem(a, b, d int64) (int64, bool) { mustNonNegative(a) mustNonNegative(b) if d <= 0 { panic("launchpad/safemath: division by zero") } hi, lo := bits.Mul64(uint64(a), uint64(b)) if hi >= uint64(d) { panic("launchpad/safemath: overflow") } q, r := bits.Div64(hi, lo, uint64(d)) if q > uint64(MaxInt64) { panic("launchpad/safemath: overflow") } return int64(q), r != 0 } // BPS returns floor(amount*bps/10000) for 0 <= bps <= 10000. func BPS(amount, bps int64) int64 { if bps < 0 || bps > BPSDenominator { panic("launchpad/safemath: basis points out of range") } return MulDiv(amount, bps, BPSDenominator) } func Min(a, b int64) int64 { if a < b { return a } return b }
6. #6/gno.MemPackageType
7. #7 MPUserAll