increase minNewCollateral and minCollateral

autopilot/contractor/contractor.go

@@ -198,7 +198,7 @@ func (c *Contractor) formContract(ctx *mCtx, hs HostScanner, host api.Host, minI
 	}
 
 	// shouldn't go below the minimum immediately so we add some buffer
-	minCollateral := MinCollateral.Mul64(2)
+	minCollateral := MinCollateral.Mul64(2).Add(contractPrice)
 	if hostCollateral.Cmp(minCollateral) < 0 {
 		hostCollateral = minCollateral
 	}
@@ -255,14 +255,17 @@ func (c *Contractor) refreshContract(ctx *mCtx, contract contract, host api.Host
 	}
 
 	var expectedNewStorage uint64
+	var contractPrice types.Currency
 	if host.IsV2() {
+		contractPrice = host.V2Settings.Prices.ContractPrice
 		expectedNewStorage = renterFundsToExpectedStorageV2(renterFunds, contract.EndHeight()-cs.BlockHeight, host.V2Settings.Prices)
 	} else {
+		contractPrice = host.PriceTable.ContractPrice
 		expectedNewStorage = renterFundsToExpectedStorage(renterFunds, contract.EndHeight()-cs.BlockHeight, pt)
 	}
 
 	// a refresh should always result in a contract that has enough collateral
-	minNewCollateral := MinCollateral.Mul64(2)
+	minNewCollateral := MinCollateral.Mul64(2).Add(contractPrice)
 
 	// renew the contract
 	renewal, err := c.bus.RenewContract(ctx, contract.ID, contract.EndHeight(), renterFunds, minNewCollateral, expectedNewStorage)