prysm-pulse/beacon-chain/rpc/apimiddleware/structs_marshalling.go

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package apimiddleware
import (
"encoding/base64"
"strconv"
"github.com/pkg/errors"
)
// EpochParticipation represents participation of validators in their duties.
type EpochParticipation []string
func (p *EpochParticipation) UnmarshalJSON(b []byte) error {
if string(b) == "null" {
return nil
}
if len(b) < 2 {
return errors.New("epoch participation length must be at least 2")
}
// Remove leading and trailing quotation marks.
decoded, err := base64.StdEncoding.DecodeString(string(b[1 : len(b)-1]))
if err != nil {
return errors.Wrapf(err, "could not decode epoch participation base64 value")
}
*p = make([]string, len(decoded))
for i, participation := range decoded {
(*p)[i] = strconv.FormatUint(uint64(participation), 10)
}
return nil
}