Prevent getting cheated by broadcasting forfeit transactions (#123)

* broadcast forfeit transaction in case the user is trying the cheat the ASP

* fix connector input + --cheat flag in CLI

* WIP

* cleaning and fixes

* add TODO

* sweeper.go: mark round swept if vtxo are redeemed

* fixes after reviews

* revert "--cheat" flag in client

* revert redeem.go

* optimization

* update account.go according to ocean ListUtxos new spec

* WaitForSync implementation

* ocean-wallet/service.go: remove go rountine while writing to notification channel

server/internal/core/application/utils.go

@@ -201,6 +201,7 @@ func (m *forfeitTxsMap) sign(txs []string) error {
 						}
 
 						if sig.Verify(preimage, pubkey) {
+							m.forfeitTxs[txid].tx = tx
 							m.forfeitTxs[txid].signed = true
 						} else {
 							return fmt.Errorf("invalid signature")