Merge pull request hyperledger-labs#115 from siburu/lc-refresh

LC refresh

chains/tendermint/config.go

@@ -4,6 +4,7 @@ import (
 	"errors"
 	"fmt"
 	"strings"
+	"time"
 
 	"github.com/hyperledger-labs/yui-relayer/core"
 )
@@ -62,11 +63,25 @@ func (c ProverConfig) Build(chain core.Chain) (core.Prover, error) {
 }
 
 func (c ProverConfig) Validate() error {
-	isEmpty := func(s string) bool {
-		return strings.TrimSpace(s) == ""
+	if _, err := time.ParseDuration(c.TrustingPeriod); err != nil {
+		return fmt.Errorf("config attribute \"trusting_period\" is invalid: %v", err)
+	}
+	if c.RefreshThresholdRate.Denominator == 0 {
+		return fmt.Errorf("config attribute \"refresh_threshold_rate.denominator\" must not be zero")
+	}
+	if c.RefreshThresholdRate.Numerator == 0 {
+		return fmt.Errorf("config attribute \"refresh_threshold_rate.numerator\" must not be zero")
 	}
-	if isEmpty(c.TrustingPeriod) {
-		return fmt.Errorf("config attribute \"trusting_period\" is empty")
+	if c.RefreshThresholdRate.Numerator > c.RefreshThresholdRate.Denominator {
+		return fmt.Errorf("config attribute \"refresh_threshold_rate\" must be less than or equal to 1.0: actual=%v/%v", c.RefreshThresholdRate.Numerator, c.RefreshThresholdRate.Denominator)
 	}
 	return nil
 }
+
+func (c ProverConfig) GetTrustingPeriod() time.Duration {
+	if d, err := time.ParseDuration(c.TrustingPeriod); err != nil {
+		panic(err)
+	} else {
+		return d
+	}
+}