client/eth: Ignore deadline exceeded.

When checking swap status do not use the pending state. It eats an error
caused by a timeout imposed by geth. Also ignore this error when
checking swap confirmations as it is always returned on testnet for
pending swaps but does not indicate anything is wrong with the swap.

client/asset/eth/contractor.go

@@ -144,7 +144,6 @@ func (c *contractorV0) redeem(txOpts *bind.TransactOpts, redemptions []*asset.Re
 
 func (c *contractorV0) swap(ctx context.Context, secretHash [32]byte) (*dexeth.SwapState, error) {
 	callOpts := &bind.CallOpts{
-		Pending: true,
 		From:    c.acctAddr,
 		Context: ctx,
 	}

client/asset/eth/eth.go

@@ -1288,6 +1288,12 @@ func (eth *ExchangeWallet) SwapConfirmations(ctx context.Context, _ dex.Bytes, c
 
 	swapData, err := eth.node.swap(ctx, secretHash, contractVer)
 	if err != nil {
+		// This error seems to always happen once for new swaps. It can
+		// be safely ignored.
+		if errors.Is(err, context.DeadlineExceeded) {
+			eth.log.Debugf("SwapConfirmations deadline exceeded for secret hash %x", secretHash)
+			return 0, false, nil
+		}
 		return 0, false, fmt.Errorf("error finding swap state: %w", err)
 	}