81 lines
1.7 KiB
Go
81 lines
1.7 KiB
Go
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package math
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import (
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"math/big"
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"sort"
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"github.com/ethereum/go-ethereum/ethutil"
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)
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type Summer interface {
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Sum(i int) *big.Int
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Len() int
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}
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func Sum(slice Summer) (sum *big.Int) {
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sum = new(big.Int)
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for i := 0; i < slice.Len(); i++ {
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sum.Add(sum, slice.Sum(i))
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}
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return
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}
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type Vector struct {
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Gas, Price *big.Int
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}
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type VectorsBy func(v1, v2 Vector) bool
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func (self VectorsBy) Sort(vectors []Vector) {
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bs := vectorSorter{
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vectors: vectors,
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by: self,
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}
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sort.Sort(bs)
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}
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type vectorSorter struct {
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vectors []Vector
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by func(v1, v2 Vector) bool
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}
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func (v vectorSorter) Len() int { return len(v.vectors) }
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func (v vectorSorter) Less(i, j int) bool { return v.by(v.vectors[i], v.vectors[j]) }
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func (v vectorSorter) Swap(i, j int) { v.vectors[i], v.vectors[j] = v.vectors[j], v.vectors[i] }
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func PriceSort(v1, v2 Vector) bool { return v1.Price.Cmp(v2.Price) < 0 }
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func GasSort(v1, v2 Vector) bool { return v1.Gas.Cmp(v2.Gas) < 0 }
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type vectorSummer struct {
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vectors []Vector
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by func(v Vector) *big.Int
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}
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type VectorSum func(v Vector) *big.Int
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func (v VectorSum) Sum(vectors []Vector) *big.Int {
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vs := vectorSummer{
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vectors: vectors,
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by: v,
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}
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return Sum(vs)
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}
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func (v vectorSummer) Len() int { return len(v.vectors) }
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func (v vectorSummer) Sum(i int) *big.Int { return v.by(v.vectors[i]) }
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func GasSum(v Vector) *big.Int { return v.Gas }
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var etherInWei = new(big.Rat).SetInt(ethutil.String2Big("1000000000000000000"))
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func GasPrice(bp, gl, ep *big.Int) *big.Int {
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BP := new(big.Rat).SetInt(bp)
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GL := new(big.Rat).SetInt(gl)
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EP := new(big.Rat).SetInt(ep)
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GP := new(big.Rat).Quo(BP, GL)
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GP = GP.Quo(GP, EP)
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return GP.Mul(GP, etherInWei).Num()
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}
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