diff --git a/chain/aura_config.go b/chain/aura_config.go
new file mode 100644
index 000000000..a8fa90190
--- /dev/null
+++ b/chain/aura_config.go
@@ -0,0 +1,93 @@
+/*
+   Copyright 2023 The Erigon contributors
+
+   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 chain
+
+import (
+	"github.com/ledgerwatch/erigon-lib/common"
+	"github.com/ledgerwatch/erigon-lib/common/hexutility"
+)
+
+// Different ways of specifying validators.
+type ValidatorSetJson struct {
+	// A simple list of authorities.
+	List []common.Address `json:"list"`
+	// Address of a contract that indicates the list of authorities.
+	SafeContract *common.Address `json:"safeContract"`
+	// Address of a contract that indicates the list of authorities and enables reporting of their misbehaviour using transactions.
+	Contract *common.Address `json:"contract"`
+	// A map of starting blocks for each validator set.
+	Multi map[uint64]*ValidatorSetJson `json:"multi"`
+}
+
+// AuRaConfig is the consensus engine configs for proof-of-authority based sealing.
+type AuRaConfig struct {
+	StepDuration *uint64           `json:"stepDuration"` // Block duration, in seconds.
+	Validators   *ValidatorSetJson `json:"validators"`   // Valid authorities
+
+	// Starting step. Determined automatically if not specified.
+	// To be used for testing only.
+	StartStep               *uint64 `json:"startStep"`
+	ValidateScoreTransition *uint64 `json:"validateScoreTransition"` // Block at which score validation should start.
+	ValidateStepTransition  *uint64 `json:"validateStepTransition"`  // Block from which monotonic steps start.
+	ImmediateTransitions    *bool   `json:"immediateTransitions"`    // Whether transitions should be immediate.
+	BlockReward             *uint64 `json:"blockReward"`             // Reward per block in wei.
+	// Block at which the block reward contract should start being used. This option allows one to
+	// add a single block reward contract transition and is compatible with the multiple address
+	// option `block_reward_contract_transitions` below.
+	BlockRewardContractTransition *uint64 `json:"blockRewardContractTransition"`
+	/// Block reward contract address which overrides the `block_reward` setting. This option allows
+	/// one to add a single block reward contract address and is compatible with the multiple
+	/// address option `block_reward_contract_transitions` below.
+	BlockRewardContractAddress *common.Address `json:"blockRewardContractAddress"`
+	// Block reward contract addresses with their associated starting block numbers.
+	//
+	// Setting the block reward contract overrides `block_reward`. If the single block reward
+	// contract address is also present then it is added into the map at the block number stored in
+	// `block_reward_contract_transition` or 0 if that block number is not provided. Therefore both
+	// a single block reward contract transition and a map of reward contract transitions can be
+	// used simultaneously in the same configuration. In such a case the code requires that the
+	// block number of the single transition is strictly less than any of the block numbers in the
+	// map.
+	BlockRewardContractTransitions map[uint]common.Address `json:"blockRewardContractTransitions"`
+	// Block at which maximum uncle count should be considered.
+	MaximumUncleCountTransition *uint64 `json:"maximumUncleCountTransition"`
+	// Maximum number of accepted uncles.
+	MaximumUncleCount *uint `json:"maximumUncleCount"`
+	// Strict validation of empty steps transition block.
+	StrictEmptyStepsTransition *uint `json:"strictEmptyStepsTransition"`
+	// The random number contract's address, or a map of contract transitions.
+	RandomnessContractAddress map[uint64]common.Address `json:"randomnessContractAddress"`
+	// The addresses of contracts that determine the block gas limit starting from the block number
+	// associated with each of those contracts.
+	BlockGasLimitContractTransitions map[uint64]common.Address `json:"blockGasLimitContractTransitions"`
+	// The block number at which the consensus engine switches from AuRa to AuRa with POSDAO
+	// modifications.
+	PosdaoTransition *uint64 `json:"PosdaoTransition"`
+	// Stores human-readable keys associated with addresses, like DNS information.
+	// This contract is primarily required to store the address of the Certifier contract.
+	Registrar *common.Address `json:"registrar"`
+
+	// See https://github.com/gnosischain/specs/blob/master/execution/withdrawals.md
+	WithdrawalContractAddress *common.Address `json:"withdrawalContractAddress"`
+
+	RewriteBytecode map[uint64]map[common.Address]hexutility.Bytes `json:"rewriteBytecode"`
+}
+
+// String implements the stringer interface, returning the consensus engine details.
+func (c *AuRaConfig) String() string {
+	return "aura"
+}
diff --git a/chain/chain_config.go b/chain/chain_config.go
index 5824fd56b..b2e33a038 100644
--- a/chain/chain_config.go
+++ b/chain/chain_config.go
@@ -401,18 +401,6 @@ func (c *CliqueConfig) String() string {
 	return "clique"
 }
 
-// AuRaConfig is the consensus engine configs for proof-of-authority based sealing.
-type AuRaConfig struct {
-	DBPath    string
-	InMemory  bool
-	Etherbase common.Address // same as miner etherbase
-}
-
-// String implements the stringer interface, returning the consensus engine details.
-func (c *AuRaConfig) String() string {
-	return "aura"
-}
-
 // BorConfig is the consensus engine configs for Matic bor based sealing.
 type BorConfig struct {
 	Period                map[string]uint64 `json:"period"`                // Number of seconds between blocks to enforce