swap/chain: add txqueue

swap/chain/backend.go

@@ -2,7 +2,6 @@ package chain
 
 import (
 	"context"
-	"errors"
 	"time"
 
 	"github.com/ethereum/go-ethereum/log"
@@ -12,11 +11,6 @@ import (
 	"github.com/ethereum/go-ethereum/core/types"
 )
 
-var (
-	// ErrTransactionReverted is given when the transaction that cashes a cheque is reverted
-	ErrTransactionReverted = errors.New("Transaction reverted")
-)
-
 // Backend is the minimum amount of functionality required by the underlying ethereum backend
 type Backend interface {
 	bind.ContractBackend
@@ -30,12 +24,9 @@ func WaitMined(ctx context.Context, b Backend, hash common.Hash) (*types.Receipt
 	for {
 		receipt, err := b.TransactionReceipt(ctx, hash)
 		if err != nil {
-			log.Error("receipt retrieval failed", "err", err)
+			log.Trace("receipt retrieval failed", "err", err)
 		}
 		if receipt != nil {
-			if receipt.Status != types.ReceiptStatusSuccessful {
-				return nil, ErrTransactionReverted
-			}
 			return receipt, nil
 		}