Add flag to specify deal start epoch

api/api_full.go

@@ -331,6 +331,7 @@ type StartDealParams struct {
 	Miner             address.Address
 	EpochPrice        types.BigInt
 	MinBlocksDuration uint64
+	DealStartEpoch    abi.ChainEpoch
 }
 
 type IpldObject struct {

cli/client.go

@@ -173,6 +173,11 @@ var clientDealCmd = &cli.Command{
 			Name:  "from",
 			Usage: "specify address to fund the deal with",
 		},
+		&cli.Int64Flag{
+			Name:  "start-epoch",
+			Usage: "specify the epoch that the deal should start at",
+			Value: -1,
+		},
 	},
 	Action: func(cctx *cli.Context) error {
 		api, closer, err := GetFullNodeAPI(cctx)
@@ -252,6 +257,7 @@ var clientDealCmd = &cli.Command{
 			Miner:             miner,
 			EpochPrice:        types.BigInt(price),
 			MinBlocksDuration: uint64(dur),
+			DealStartEpoch:    abi.ChainEpoch(cctx.Int64("start-epoch")),
 		})
 		if err != nil {
 			return err

node/impl/client/client.go

@@ -3,6 +3,7 @@ package client
 import (
 	"context"
 	"errors"
+
 	"github.com/filecoin-project/go-fil-markets/pieceio"
 	ipldfree "github.com/ipld/go-ipld-prime/impl/free"
 	"github.com/ipld/go-ipld-prime/traversal/selector"
@@ -66,9 +67,9 @@ type API struct {
 	Filestore  dtypes.ClientFilestore `optional:"true"`
 }
 
-func calcDealExpiration(minDuration uint64, md *miner.DeadlineInfo, ts *types.TipSet) abi.ChainEpoch {
+func calcDealExpiration(minDuration uint64, md *miner.DeadlineInfo, startEpoch abi.ChainEpoch) abi.ChainEpoch {
 	// Make sure we give some time for the miner to seal
-	minExp := ts.Height() + dealStartBuffer + abi.ChainEpoch(minDuration)
+	minExp := startEpoch + abi.ChainEpoch(minDuration)
 
 	// Align on miners ProvingPeriodBoundary
 	return minExp + miner.WPoStProvingPeriod - (minExp % miner.WPoStProvingPeriod) + (md.PeriodStart % miner.WPoStProvingPeriod) - 1
@@ -103,18 +104,24 @@ func (a *API) ClientStartDeal(ctx context.Context, params *api.StartDealParams)
 	}
 
 	providerInfo := utils.NewStorageProviderInfo(params.Miner, mi.Worker, mi.SectorSize, mi.PeerId)
+
+	dealStart := params.DealStartEpoch
+	if dealStart <= 0 { // unset, or explicitly 'epoch undefined'
 		ts, err := a.ChainHead(ctx)
 		if err != nil {
 			return nil, xerrors.Errorf("failed getting chain height: %w", err)
 		}
 
+		dealStart = ts.Height() + dealStartBuffer
+	}
+
 	result, err := a.SMDealClient.ProposeStorageDeal(
 		ctx,
 		params.Wallet,
 		&providerInfo,
 		params.Data,
-		ts.Height()+dealStartBuffer,
+		dealStart,
-		calcDealExpiration(params.MinBlocksDuration, md, ts),
+		calcDealExpiration(params.MinBlocksDuration, md, dealStart),
 		params.EpochPrice,
 		big.Zero(),
 		rt,