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data_transfer.go
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/
data_transfer.go
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package market
import (
"encoding/json"
"fmt"
datatransfer "github.com/filecoin-project/go-data-transfer"
"github.com/ipfs/go-cid"
"github.com/libp2p/go-libp2p/core/peer"
)
type DataTransferChannel struct {
TransferID datatransfer.TransferID
Status datatransfer.Status
BaseCID cid.Cid
IsInitiator bool
IsSender bool
Voucher string
Message string
OtherPeer peer.ID
Transferred uint64
Stages *datatransfer.ChannelStages
}
// NewDataTransferChannel constructs an API DataTransferChannel type from full channel state snapshot and a host id
func NewDataTransferChannel(hostID peer.ID, channelState datatransfer.ChannelState) DataTransferChannel {
channel := DataTransferChannel{
TransferID: channelState.TransferID(),
Status: channelState.Status(),
BaseCID: channelState.BaseCID(),
IsSender: channelState.Sender() == hostID,
Message: channelState.Message(),
}
stringer, ok := channelState.Voucher().(fmt.Stringer)
if ok {
channel.Voucher = stringer.String()
} else {
voucherJSON, err := json.Marshal(channelState.Voucher())
if err != nil {
channel.Voucher = fmt.Errorf("Voucher Serialization: %w", err).Error() //nolint:stylecheck
} else {
channel.Voucher = string(voucherJSON)
}
}
if channel.IsSender {
channel.IsInitiator = !channelState.IsPull()
channel.Transferred = channelState.Sent()
channel.OtherPeer = channelState.Recipient()
} else {
channel.IsInitiator = channelState.IsPull()
channel.Transferred = channelState.Received()
channel.OtherPeer = channelState.Sender()
}
return channel
}