feat: take rate, multi-currency (#118)

* expose currency to bid engine

bidengine/order.go

@@ -387,6 +387,11 @@ loop:
 			price := result.Value().(sdk.DecCoin)
 			maxPrice := group.GroupSpec.Price()
 
+			if maxPrice.GetDenom() != price.GetDenom() {
+				o.log.Error("Unsupported Denomination", "calculated", price.String(), "max-price", maxPrice.String())
+				break loop
+			}
+
 			if maxPrice.IsLT(price) {
 				o.log.Info("Price too high, not bidding", "price", price.String(), "max-price", maxPrice.String())
 				break loop

bidengine/pricing.go

@@ -27,8 +27,6 @@ type BidPricingStrategy interface {
 	CalculatePrice(ctx context.Context, req Request) (sdk.DecCoin, error)
 }
 
-const denom = "uakt"
-
 var (
 	errAllScalesZero               = errors.New("at least one bid price must be a non-zero number")
 	errNoPriceScaleForStorageClass = errors.New("no pricing configured for storage class")
@@ -130,6 +128,7 @@ func (fp scalePricing) CalculatePrice(_ context.Context, req Request) (sdk.DecCo
 	cpuTotal := decimal.NewFromInt(0)
 	memoryTotal := decimal.NewFromInt(0)
 	storageTotal := make(Storage)
+	denom := req.GSpec.Price().Denom
 
 	for k := range fp.storageScale {
 		storageTotal[k] = decimal.NewFromInt(0)

bidengine/shellscript.go

@@ -161,8 +161,11 @@ func (ssp shellScriptPricing) CalculatePrice(ctx context.Context, req Request) (
 	stderrBuf := &bytes.Buffer{}
 	cmd.Stderr = stderrBuf
 
+	denom := req.GSpec.Price().Denom
+
 	subprocEnv := os.Environ()
 	subprocEnv = append(subprocEnv, fmt.Sprintf("AKASH_OWNER=%s", req.Owner))
+	subprocEnv = append(subprocEnv, fmt.Sprintf("AKASH_DENOM=%s", denom))
 	cmd.Env = subprocEnv
 
 	err = cmd.Run()