prysm-pulse/beacon-chain/rpc/eth/shared/errors.go

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package shared
import (
"fmt"
"strings"
)
// DecodeError represents an error resulting from trying to decode an HTTP request.
// It tracks the full field name for which decoding failed.
type DecodeError struct {
path []string
err error
}
// NewDecodeError wraps an error (either the initial decoding error or another DecodeError).
// The current field that failed decoding must be passed in.
func NewDecodeError(err error, field string) *DecodeError {
de, ok := err.(*DecodeError)
if ok {
return &DecodeError{path: append([]string{field}, de.path...), err: de.err}
}
return &DecodeError{path: []string{field}, err: err}
}
// Error returns the formatted error message which contains the full field name and the actual decoding error.
func (e *DecodeError) Error() string {
return fmt.Sprintf("could not decode %s: %s", strings.Join(e.path, "."), e.err.Error())
}