| 1: Procedure func (s SmartContract) Insert(ctx contractapi.TransactionContextInterface, id string, item string) error |
| 2: cfJSON, err: = ctx.GetStub().GetState(id) |
| 3: If err! = nil then |
| 4: Return shim.Error(err.Error()) |
| 5: End if |
| 6: var cf CFilter |
| 7: err = json.Unmarshal(cfJSON, &cf) |
| 8: If err! = nil then |
| 9: Return shim.Error(err.Error()) |
| 10: End if |
| 11: f := fprint([]byte(item), cf.FpSize, Hashfn) |
| 12: j: = hashfp([]byte(item)) |
| 13: k := (j XOR hashfp(f)) % cf.Size |
| 14: If cf.Buckets[j].insert(f) || cf.Buckets[k].insert(f) then |
| 15: cf.Count++ |
| 16: Else |
| 17: i: = [2]uint{j, k}[rand.Intn(2)] |
| 18: |
| 19: For n := uint(0); n<cf.Kicks; n++ do |
| 20: f = cf.Buckets[i].swap(f) |
| 21: i = (i XOR hashfp(f)) % cf.Size |
| 22: |
| 23: If cf.Buckets[i].insert(f) then |
| 24: cf.Count++ |
| 25: End if |
| 26: End for |
| 27: End if |
| 28: cfJSON, err = json.Marshal(&cf) |
| 29: If err! = nil then |
| 30: Return shim.Error(err.Error()) |
| 31: End if |
| 32: CF_: = CF{id: Id, cfilter: cfJSON} |
| 33: err = ctx.GetStub().PutState(cf_.id, cf_.cfilter) |
| 34: If err! = nil then |
| 35: Return shim.Error(err.Error()) |
| 36: End if |
| 37: Return nil |
| 38: End procedure |
