refactor(datatransfer): implement style fixes

implement style fixes suggested by Magic6k

chain/deals/client_utils.go

@@ -151,10 +151,7 @@ func (c *ClientRequestValidator) ValidatePull(
 	}
 
 	var deal ClientDeal
-	err := c.deals.Mutate(dealVoucher.Proposal, func(d *ClientDeal) error {
+	err := c.deals.Get(dealVoucher.Proposal, &deal)
-		deal = *d
-		return nil
-	})
 	if err != nil {
 		return xerrors.Errorf("Proposal CID %s: %w", dealVoucher.Proposal.String(), ErrNoDeal)
 	}

chain/deals/provider_utils.go

@@ -167,10 +167,7 @@ func (m *ProviderRequestValidator) ValidatePush(
 	}
 
 	var deal MinerDeal
-	err := m.deals.Mutate(dealVoucher.Proposal, func(d *MinerDeal) error {
+	err := m.deals.Get(dealVoucher.Proposal, &deal)
-		deal = *d
-		return nil
-	})
 	if err != nil {
 		return xerrors.Errorf("Proposal CID %s: %w", dealVoucher.Proposal.String(), ErrNoDeal)
 	}

chain/deals/types.go

@@ -14,28 +14,28 @@ import (
 
 var (
 	// ErrWrongVoucherType means the voucher was not the correct type can validate against
-	ErrWrongVoucherType = errors.New("cannot validate voucher type")
+	ErrWrongVoucherType = errors.New("cannot validate voucher type.")
 
 	// ErrNoPushAccepted just means clients do not accept pushes for storage deals
-	ErrNoPushAccepted = errors.New("Client should not receive data for a storage deal")
+	ErrNoPushAccepted = errors.New("client should not receive data for a storage deal.")
 
 	// ErrNoPullAccepted just means providers do not accept pulls for storage deals
-	ErrNoPullAccepted = errors.New("Provider should not send data for a storage deal")
+	ErrNoPullAccepted = errors.New("provider should not send data for a storage deal.")
 
 	// ErrNoDeal means no active deal was found for this vouchers proposal cid
-	ErrNoDeal = errors.New("No deal found for this proposal")
+	ErrNoDeal = errors.New("no deal found for this proposal.")
 
 	// ErrWrongPeer means that the other peer for this data transfer request does not match
 	// the other peer for the deal
-	ErrWrongPeer = errors.New("Data Transfer peer id and Deal peer id do not match")
+	ErrWrongPeer = errors.New("data Transfer peer id and Deal peer id do not match.")
 
 	// ErrWrongPiece means that the pieceref for this data transfer request does not match
 	// the one specified in the deal
-	ErrWrongPiece = errors.New("Base CID for deal does not match CID for piece")
+	ErrWrongPiece = errors.New("base CID for deal does not match CID for piece.")
 
 	// ErrInacceptableDealState means the deal for this transfer is not in a deal state
 	// where transfer can be performed
-	ErrInacceptableDealState = errors.New("Deal is not a in a state where deals are accepted")
+	ErrInacceptableDealState = errors.New("deal is not a in a state where deals are accepted.")
 
 	// DataTransferStates are the states in which it would make sense to actually start a data transfer
 	DataTransferStates = []api.DealState{api.DealAccepted, api.DealUnknown}

datatransfer/types.go

@@ -23,20 +23,20 @@ type Voucher interface {
 }
 
 // Status is the status of transfer for a given channel
-type Status string
+type Status int
 
 const (
 	// Ongoing means the data transfer is in progress
-	Ongoing = Status("Ongoing")
+	Ongoing Status = iota
 
 	// Completed means the data transfer is completed successfully
-	Completed = Status("Completed")
+	Completed
 
 	// Failed means the data transfer failed
-	Failed = Status("Failed")
+	Failed
 
 	// ChannelNotFoundError means the searched for data transfer does not exist
-	ChannelNotFoundError = Status("ChannelNotFoundError")
+	ChannelNotFoundError
 )
 
 // TransferID is an identifier for a data transfer, shared between
@@ -106,20 +106,20 @@ func (c ChannelState) Sent() uint64 { return c.sent }
 func (c ChannelState) Received() uint64 { return c.received }
 
 // Event is a name for an event that occurs on a data transfer channel
-type Event string
+type Event int
 
 const (
 	// Open is an event occurs when a channel is first opened
-	Open = Event("Open")
+	Open Event = iota
 
 	// Progress is an event that gets emitted every time more data is transferred
-	Progress = Event("Progress")
+	Progress
 
 	// Error is an event that emits when an error occurs in a data transfer
-	Error = Event("Error")
+	Error
 
 	// Complete is emitted when a data transfer is complete
-	Complete = Event("Complete")
+	Complete
 )
 
 // Subscriber is a callback that is called when events are emitted