Preferably, {TAIL ~ the current transaction information} is used to update both the remote ledger and {HEAD ~ the shadow ledger} 
Preferably , { TAIL ~ the current transaction information } is used to update both the remote ledger and { HEAD ~ the shadow ledger }
OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD