Deterministic Deployments

Seismic provides common infrastructure contracts at addresses shared with other EVM networks. These contracts are deployed after the chain starts using ordinary transactions whose senders, nonces, and creation code produce the same addresses on every compatible network.

They are not genesis predeploys. A deterministic contract is unavailable until its deployment transaction has been included, and its deployment produces normal transaction history and a receipt.

Availability can differ between Seismic networks. Use eth_getCode to confirm that a contract is installed before depending on it.

Addresses

Contract	Address
Create2 — Nick's method	0x4e59b44847b379578588920cA78FbF26c0B4956C
ERC-1820 Registry	0x1820a4B7618BdE71Dce8cdc73aAB6C95905faD24
SingletonFactory (ERC-2470)	0xce0042B868300000d44A59004Da54A005ffdcf9f
Multicall3	0xcA11bde05977b3631167028862bE2a173976CA11
Deterministic Deployment Proxy	0x7A0D94F55792C434d74a40883C6ed8545E406D12
Inefficient ImmutableCreate2Factory	0xcfA3A7637547094fF06246817a35B8333C315196
ImmutableCreate2Factory	0x0000000000FFe8B47B3e2130213B802212439497
Permit2	0x000000000022D473030F116dDEE9F6B43aC78BA3
CreateX	0xba5Ed099633D3B313e4D5F7bdc1305d3c28ba5Ed

These contracts provide shared deployment factories, interface discovery, batched reads and calls, and token approval infrastructure. Keeping their canonical addresses makes applications and deployment tooling portable across EVM networks.

The contracts with “Proxy” in their names are deterministic deployment utilities. They are not upgradeability proxies for Seismic's genesis contracts.

Verify a deployment

Check an address before using it:

cast code \
  0xcA11bde05977b3631167028862bE2a173976CA11 \
  --rpc-url "$SEISMIC_RPC_URL"

An installed contract returns non-empty bytecode. 0x means no contract is currently deployed at that address on the selected network.