🐛 [backend/eth/channel] Use the provided Log from EventSub.

Since a specific event that was casted from a generic event does
not contain Raw field, we have to use the generic Log field here.

Geth gets around this by manually setting the Raw field in their
specifig event subs every time.

Signed-off-by: Oliver Tale-Yazdi <oliver@perun.network>

Author: ggwpez

backend/ethereum/channel/subscription.go

@@ -84,7 +84,7 @@ evloop:
 				currentTimeout := current.Timeout().(*BlockTimeout)
 				// if newer version or same version and newer timeout, replace
 				if current.Version() < next.Version || current.Version() == next.Version && currentTimeout.Time < next.Timeout {
-					e, err := a.convertEvent(ctx, next)
+					e, err := a.convertEvent(ctx, next, _next.Log.TxHash)
 					if err != nil {
 						r.err <- err
 						break evloop
@@ -95,7 +95,7 @@ evloop:
 					r.next <- current
 				}
 			default: // next-channel is empty
-				e, err := a.convertEvent(ctx, next)
+				e, err := a.convertEvent(ctx, next, _next.Log.TxHash)
 				if err != nil {
 					r.err <- err
 					break evloop
@@ -147,14 +147,14 @@ func (r *RegisteredSub) Err() error {
 	return <-r.err
 }
 
-func (a *Adjudicator) convertEvent(ctx context.Context, e *adjudicator.AdjudicatorChannelUpdate) (channel.AdjudicatorEvent, error) {
+func (a *Adjudicator) convertEvent(ctx context.Context, e *adjudicator.AdjudicatorChannelUpdate, txHash common.Hash) (channel.AdjudicatorEvent, error) {
 	base := channel.NewAdjudicatorEventBase(e.ChannelID, NewBlockTimeout(a.ContractInterface, e.Timeout), e.Version)
 	switch e.Phase {
 	case phaseDispute:
 		return &channel.RegisteredEvent{AdjudicatorEventBase: *base}, nil
 
 	case phaseForceExec:
-		args, err := a.fetchProgressCallData(ctx, e.Raw.TxHash)
+		args, err := a.fetchProgressCallData(ctx, txHash)
 		if err != nil {
 			return nil, errors.WithMessage(err, "fetching call data")
 		}