Merge pull request #4415 from filecoin-project/feat/use-build-seconds…

…-delay

Use build.BlockDelaySecs for deal start buffer

node/modules/storageminer.go

@@ -474,7 +474,7 @@ func BasicDealFilter(user dtypes.DealFilter) func(onlineOk dtypes.ConsiderOnline
 
 			// Reject if it's more than 7 days in the future
 			// TODO: read from cfg
-			maxStartEpoch := earliest + abi.ChainEpoch(7*builtin.EpochsInDay)
+			maxStartEpoch := earliest + abi.ChainEpoch(7*builtin.SecondsInDay/build.BlockDelaySecs)
 			if deal.Proposal.StartEpoch > maxStartEpoch {
 				return false, fmt.Sprintf("deal start epoch is too far in the future: %s > %s", deal.Proposal.StartEpoch, maxStartEpoch), nil
 			}