prysm-pulse/beacon-chain/db/kv/schema.go

package kv

// The schema will define how to store and retrieve data from the db.
// we can prefix or suffix certain values such as `block` with attributes
// for prefix-wide scans across the underlying BoltDB buckets when filtering data.
// For example, we might store attestations as shard + attestation_root -> attestation, making
// it easy to scan for keys that have a certain shard number as a prefix and return those
// corresponding attestations.
var (
	attestationsBucket       = []byte("attestations")
	attestationIndicesBucket = []byte("attestation-indices")
	blocksBucket             = []byte("blocks")
	blockIndicesBucket       = []byte("block-indices")
	validatorsBucket         = []byte("validators")
	stateBucket              = []byte("state")

	// Key indices.
	shardIdx      = []byte("shard")
	parentRootIdx = []byte("parent-root")
	startEpochIdx = []byte("start-epoch")
	endEpochIdx   = []byte("end-epoch")

	// Block keys.
	headBlockRootKey = []byte("head-root")
)