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Both self hosted and cloud version are required some variables to be provided during the initialization of an SDK. The list of envs for cloud version is significant, than for a self hosted one. Here is the full list of variables:
Variable NameDescriptionVersionMandatory
PRIVY_APP_IDPrivy wallet app id for embedded walletsSelf-hostedYes
PRIVY_APP_SECRETPrivy wallet app secret for embedded walletsSelf-hostedYes
RPC_URLA RPC URL for a chainSelf-hostedYes
BUNDLER_URLA bundler URL to process User OperationsSelf-hostedYes
COINBASE_CDP_API_KEY_IDCoinbase CDP Api Key ID for on/off ramp functionalitySelf-hostedNo
COINBASE_CDP_API_KEY_SECRETCoinbase CDP Api secret for on/off ramp functionalitySelf-hostedNo
INTEGRATOR_IDUnique integrator ID to track SDK usage and enable 3rd party services (e.g., Coinbase off/on-ramp)Self-hostedYes
API_KEYAPI key to run SDK with managed settingsCloudYes
PROTOCOL_RISK_LEVELRisk level of protocol that will be used by an SDK in the configurationCloud & self-hostedYes
CHAIN_IDChain ID to work withCloud & self-hostedYes

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Faucet variables

If you want to run the local faucet, you need to set variables in .env for the faucet service in packages/blockchain
EnvDescritpion
FORK_RPC_URLThe URL of your chain fork
EXPRESS_PORTThe port for the facuet service
EXPRESS_ENTRYThe main file for the faucet service
NODE_CMDManager to run the script
BUNDLER_URLThe URL of the Alto bundler