Unsupported account_type {account_type:?} for Coinbase; expe

Error message

Unsupported account_type {account_type:?} for Coinbase; expected Cash (spot) or Margin (CFM derivatives)

What it means

The Coinbase execution client factory only accepts AccountType::Cash (spot trading) or AccountType::Margin (CFM derivatives). Any other account_type in the CoinbaseExecClientConfig is rejected at client creation with this error.

Source

Thrown at crates/adapters/coinbase/src/factories.rs:159

        &self,
        trader_id: TraderId,
        name: &str,
        config: &dyn ClientConfig,
        cache: CacheView,
    ) -> anyhow::Result<Box<dyn ExecutionClient>> {
        let coinbase_config = config
            .as_any()
            .downcast_ref::<CoinbaseExecutionClientConfig>()
            .ok_or_else(|| {
                anyhow::anyhow!(
                    "Invalid config type for CoinbaseExecutionClientFactory. Expected CoinbaseExecutionClientConfig, was {config:?}",
                )
            })?
            .clone();

        let account_type = coinbase_config.account_type;
        if !matches!(account_type, AccountType::Cash | AccountType::Margin) {
            anyhow::bail!(
                "Unsupported account_type {account_type:?} for Coinbase; expected Cash (spot) or Margin (CFM derivatives)"
            );
        }

        let core = ExecutionClientCore::new(
            trader_id,
            ClientId::from(name),
            *COINBASE_VENUE,
            OmsType::Netting,
            coinbase_config.account_id,
            account_type,
            None,
            cache,
        );

        let client = CoinbaseExecutionClient::new(core, coinbase_config)?;

        Ok(Box::new(client))

View on GitHub (pinned to 18893faf8b)

Solutions

Set account_type to AccountType::Cash for spot trading
Set account_type to AccountType::Margin for CFM (derivatives) trading
Validate the config enum value before passing it to the factory
Use the dedicated Coinbase execution client config type (not a generic one) so deserialization constrains the field

Example fix

// before
let config = CoinbaseExecClientConfig { account_type: AccountType::Futures, .. };

// after
let config = CoinbaseExecClientConfig { account_type: AccountType::Margin, .. }; // or AccountType::Cash

Defensive patterns

Strategy: validation

When it happens

Trigger: Constructing a Coinbase execution client via the factory with config.account_type set to e.g. AccountType::CashAndMargin, Futures, or another variant unsupported by the venue.

Common situations: Copying a config from another adapter whose account_type variant differs; typos/serialization producing an unexpected enum value; assuming Coinbase supports margin+futures combined account modes.

Related errors

AI-assisted analysis of nautechsystems/nautilus_trader@18893faf8b (2026-09-08). Data as JSON: /api/errors/406783242c241d2b. Report an issue: GitHub.