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/
evidence.go
55 lines (46 loc) · 1.71 KB
/
evidence.go
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// Copyright 2016-2018 Stratumn SAS. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package types
import (
"github.com/stratumn/go-chainscript"
"github.com/stratumn/go-core/monitoring/errorcode"
)
// EvidenceSlice is a slice of evidences.
type EvidenceSlice []*chainscript.Evidence
// AddEvidence adds an evidence to the slice.
func (e *EvidenceSlice) AddEvidence(evidence *chainscript.Evidence) error {
if e.GetEvidence(evidence.Backend, evidence.Provider) != nil {
return NewErrorf(errorcode.AlreadyExists, Component, "evidence already exists for backend %s and provider %s", evidence.Backend, evidence.Provider)
}
*e = append(*e, evidence)
return nil
}
// GetEvidence gets an evidence from a backend's provider.
func (e EvidenceSlice) GetEvidence(backend, provider string) *chainscript.Evidence {
for _, evidence := range e {
if evidence.Backend == backend && evidence.Provider == provider {
return evidence
}
}
return nil
}
// FindEvidences find all evidences generated by a specified backend.
func (e EvidenceSlice) FindEvidences(backend string) (res EvidenceSlice) {
for _, evidence := range e {
if evidence.Backend == backend {
res = append(res, evidence)
}
}
return res
}