/
prettyprint.go
38 lines (34 loc) · 1.35 KB
/
prettyprint.go
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package api
import (
"context"
"fmt"
"strings"
"github.com/oasisprotocol/oasis-core/go/common/prettyprint"
"github.com/oasisprotocol/oasis-core/go/common/quantity"
)
// PrettyPrintCommissionRatePercentage returns the string representing the
// commission rate (bound) in percentage for the given commission rate (bound)
// numerator.
func PrettyPrintCommissionRatePercentage(rateNumerator quantity.Quantity) string {
// Handle invalid commission rate (bound) numerator.
if rateNumerator.Cmp(CommissionRateDenominator) > 0 {
return "(invalid)"
}
// Reduce commission rate denominator's base-10 exponent by 2 to obtain the
// value in percentage.
denominatorExp := commissionRateDenominatorExponent - 2
return fmt.Sprintf("%s%%", prettyprint.QuantityFrac(rateNumerator, denominatorExp))
}
// PrettyPrintCommissionScheduleIndexInfixes returns two infixes:
// - indexInfix holds the infix to use to pretty print the given commission
// schedule rate (bound) index
// - emptyInfix holds the infix to use to pretty print an empty string of an
// equivalent length
func PrettyPrintCommissionScheduleIndexInfixes(ctx context.Context) (indexInfix, emptyInfix string) {
index, ok := ctx.Value(prettyprint.ContextKeyCommissionScheduleIndex).(int)
if ok {
indexInfix = fmt.Sprintf("(%d) ", index+1)
emptyInfix = strings.Repeat(" ", len(indexInfix))
}
return
}