Predeploys
A predeploy is an EVM contract whose runtime bytecode and initial storage are included directly in a network's genesis allocation. It is available from block 0 at a fixed address, without a deployment transaction.
The exact predeploy set can differ between Seismic networks and protocol versions. A network's genesis file is the source of truth. The checked-in genesis contract manifest defines the Solidity contracts included by Seismic's genesis builder. Use eth_getCode to confirm that a particular address contains code on the network you are using.
Seismic genesis predeploys
These Seismic contracts are installed by placing their runtime bytecode at a fixed address in the genesis allocation. Constructors do not run during this process, so any required initial state must also be supplied by the genesis configuration.
Deposit contract
0x00000000219ab540356cBB839Cbe05303d7705Fa
Accepts validator deposits and maintains the deposit Merkle tree
Protocol parameters
0x0000000000000000000000000000506172616D73
Stores owner-managed protocol configuration
Shielded delegation account
0x0000000000000000000000000000000000002001
Experimental EIP-7702 delegation implementation with shielded session keys
UpgradeOperator
0x1000000000000000000000000000000000000001
Stores TEE measurements permitted to participate in the network
MultisigUpgradeOperator
0x1000000000000000000000000000000000000002
Authorizes changes to UpgradeOperator
Directory
0x1000000000000000000000000000000000000004
Stores account viewing keys used by SRC20 encrypted events
Intelligence
0x1000000000000000000000000000000000000005
Manages intelligence providers and encrypts data to their registered keys
Operations sentinel
0x1000000000000000000000000000000000000006
Reserved target for node operations authorization messages; not an application contract
UpgradeOperator and MultisigUpgradeOperator are intended for TEE measurement admission. Despite their names, they do not upgrade contract bytecode. They are deployed at their fixed addresses but are not currently used by the network.
The public testnet genesis still contains the deprecated AES Solidity library at 0x1000000000000000000000000000000000000003. It is not an AES precompile. Current contracts call the AES and HKDF precompiles through internal CryptoUtils functions and do not link to this deployed library. It has been removed from the genesis manifest used to build future dev configurations.
The operations sentinel is intercepted by Seismic node software. Its fixed address and ABI identify an operations request, while its behavior is not provided by the bytecode at that address.
Ethereum system predeploys
Seismic also includes Ethereum-standard system contracts needed by the execution and consensus protocols.
Beacon block roots
0x000F3df6D732807Ef1319fB7B8bB8522d0Beac02
EIP-4788
Withdrawal requests
0x00000961Ef480Eb55e80D19ad83579A64c007002
EIP-7002
These contracts are part of protocol execution. Their bytecode should change only as part of a coordinated protocol upgrade, not through an application administrator.
Upgradeability
The current genesis configuration installs the listed runtime bytecode directly at each predeploy address. It does not currently put the Seismic predeploys behind EIP-1967 proxies.
Upgradeability is a property of an individual predeploy, not of the address range itself. Stateful Seismic services may move behind stable proxies in a future genesis version, while consensus-standard contracts, linked libraries, and EIP-7702 delegation implementations should remain direct code deployments.
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