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// Copyright 2022 The OpenZipkin Authors
//
// 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 b3
import "errors"
// Common Header Extraction / Injection errors
var (
ErrInvalidSampledByte = errors.New("invalid B3 Sampled found")
ErrInvalidSampledHeader = errors.New("invalid B3 Sampled header found")
ErrInvalidFlagsHeader = errors.New("invalid B3 Flags header found")
ErrInvalidTraceIDHeader = errors.New("invalid B3 TraceID header found")
ErrInvalidSpanIDHeader = errors.New("invalid B3 SpanID header found")
ErrInvalidParentSpanIDHeader = errors.New("invalid B3 ParentSpanID header found")
ErrInvalidScope = errors.New("require either both TraceID and SpanID or none")
ErrInvalidScopeParent = errors.New("ParentSpanID requires both TraceID and SpanID to be available")
ErrInvalidScopeParentSingle = errors.New("ParentSpanID requires TraceID, SpanID and Sampled to be available")
ErrEmptyContext = errors.New("empty request context")
ErrInvalidTraceIDValue = errors.New("invalid B3 TraceID value found")
ErrInvalidSpanIDValue = errors.New("invalid B3 SpanID value found")
ErrInvalidParentSpanIDValue = errors.New("invalid B3 ParentSpanID value found")
)
// Default B3 Header keys
const (
TraceID = "x-b3-traceid"
SpanID = "x-b3-spanid"
ParentSpanID = "x-b3-parentspanid"
Sampled = "x-b3-sampled"
Flags = "x-b3-flags"
Context = "b3"
)
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