diff --git a/chainstate/types/types.go b/chainstate/types/types.go
new file mode 100644
index 0000000000..55b76075a1
--- /dev/null
+++ b/chainstate/types/types.go
@@ -0,0 +1,151 @@
+package types
+
+import (
+	"math/big"
+	"time"
+
+	"github.com/Layr-Labs/eigenda/core"
+	"github.com/ethereum/go-ethereum/common"
+)
+
+// OperatorStatus represents the registration status filter for operators.
+type OperatorStatus int
+
+const (
+	// OperatorStatusAll returns both registered and deregistered operators
+	OperatorStatusAll OperatorStatus = iota
+
+	// OperatorStatusRegistered returns only registered operators
+	OperatorStatusRegistered
+
+	// OperatorStatusDeregistered returns only deregistered operators
+	OperatorStatusDeregistered
+)
+
+// Operator represents an EigenDA operator with their registration information.
+type Operator struct {
+	// Unique operator identifier
+	OperatorID core.OperatorID
+
+	// Ethereum address of the operator
+	Address common.Address
+
+	// BLS public key (G1 point)
+	BLSPubKeyG1 *core.G1Point
+
+	// BLS public key (G2 point)
+	BLSPubKeyG2 *core.G2Point
+
+	// Socket address for connecting to the operator
+	Socket string
+
+	// Block number when the operator was registered
+	RegisteredAtBlockNumber uint64
+
+	// Block number when the operator was deregistered (nil if still registered)
+	DeregisteredAtBlockNumber *uint64
+
+	// List of quorum IDs the operator is part of
+	QuorumIDs []core.QuorumID
+
+	// Transaction hash of the registration
+	RegisteredTxHash common.Hash
+
+	// Transaction hash of the deregistration (nil if still registered)
+	DeregisteredTxHash *common.Hash
+}
+
+// IsRegistered returns true if the operator is currently registered.
+func (o *Operator) IsRegistered() bool {
+	return o.DeregisteredAtBlockNumber == nil
+}
+
+// QuorumAPK represents the aggregate public key for a quorum at a specific block.
+type QuorumAPK struct {
+	// Quorum identifier
+	QuorumID core.QuorumID
+
+	// Block number for this snapshot
+	BlockNumber uint64
+
+	// Aggregate public key for all operators in the quorum
+	APK *core.G1Point
+
+	// Total stake in the quorum
+	TotalStake *big.Int
+
+	// Timestamp when this was recorded
+	UpdatedAt time.Time
+}
+
+// OperatorSocketUpdate represents a socket address update for an operator.
+type OperatorSocketUpdate struct {
+	// Operator identifier
+	OperatorID core.OperatorID
+
+	// New socket address
+	Socket string
+
+	// Block number of the update
+	BlockNumber uint64
+
+	// Transaction hash of the update
+	TxHash common.Hash
+
+	// Timestamp when this was recorded
+	UpdatedAt time.Time
+}
+
+// OperatorEjection represents an operator ejection event.
+type OperatorEjection struct {
+	// Operator identifier
+	OperatorID core.OperatorID
+
+	// Quorums from which the operator was ejected
+	QuorumIDs []core.QuorumID
+
+	// Block number of the ejection
+	BlockNumber uint64
+
+	// Transaction hash of the ejection
+	TxHash common.Hash
+
+	// Timestamp when the ejection occurred
+	EjectedAt time.Time
+}
+
+// OperatorFilter is used to filter operators when querying.
+type OperatorFilter struct {
+	// Filter by registration status (default: OperatorStatusAll)
+	Status OperatorStatus
+
+	// Filter by specific quorum ID (nil for all)
+	QuorumID *core.QuorumID
+
+	// Minimum block number (inclusive)
+	MinBlock uint64
+
+	// Maximum block number (inclusive, 0 for no limit)
+	MaxBlock uint64
+}
+
+// QuorumAPKQuery is used to get the APK for a specific block.
+type QuorumAPKQuery struct {
+	// Quorum identifier
+	QuorumID core.QuorumID
+
+	// Block number for the snapshot (0 for latest)
+	BlockNumber uint64
+}
+
+// QuorumAPKHistoryFilter is used to filter quorum APK snapshots over a range.
+type QuorumAPKHistoryFilter struct {
+	// Quorum identifier
+	QuorumID core.QuorumID
+
+	// Get all snapshots after this block (inclusive)
+	MinBlock uint64
+
+	// Get all snapshots before this block (inclusive, 0 for no limit)
+	MaxBlock uint64
+}