NewSimulatedChain creates a new simulated chain with the given number of signers.

DefaultBalance is the default balance for each account in the simulated chain.

DefaultGasLimit is the default gas limit for each transaction in the simulated chain.

SimulatedChainID is the chain ID used for the simulated chain.

Signer represents a signer with a private key.

SimulatedChain represents a simulated chain with a backend and a list of signers.