nautechsystems/nautilus_trader · error

Proxy kind is unsupported

Error message

Proxy kind is unsupported

What it means

Deployment manifest validation: a contract's proxy kind string is not one of the supported schemes (eip1967_implementation, zeppelinos_implementation), so its proxy cannot be resolved and the manifest is rejected.

Source

Thrown at crates/adapters/blockchain/src/rpc/verification.rs:1284

        anyhow::ensure!(
            contract_addresses.insert(address),
            "Deployment manifest contains a duplicate contract address"
        );
        roles.insert(contract.role);
        let code_hash = B256::from_str(&contract.runtime_code_hash)
            .map_err(|_| anyhow::anyhow!("Deployment manifest contains an invalid code hash"))?;
        anyhow::ensure!(
            code_hash != B256::ZERO,
            "Manifest code hashes must be nonzero"
        );
        anyhow::ensure!(
            matches!(contract.role, BlockchainContractRole::Implementation)
                || !contract.probes.is_empty(),
            "Every deployed contract role requires at least one identity probe"
        );

        if let Some(proxy) = &contract.proxy {
            anyhow::ensure!(
                matches!(
                    proxy.kind.as_str(),
                    "eip1967_implementation" | "zeppelinos_implementation"
                ),
                "Proxy kind is unsupported"
            );
            B256::from_str(&proxy.storage_slot)
                .map_err(|_| anyhow::anyhow!("Proxy storage slot is invalid"))?;
            let storage_value = B256::from_str(&proxy.storage_value)
                .map_err(|_| anyhow::anyhow!("Proxy storage value is invalid"))?;
            let target = Address::from_str(&proxy.target_address)
                .map_err(|_| anyhow::anyhow!("Proxy target address is invalid"))?;
            let target_hash = B256::from_str(&proxy.target_code_hash)
                .map_err(|_| anyhow::anyhow!("Proxy target code hash is invalid"))?;
            anyhow::ensure!(
                target != Address::ZERO
                    && target != address
                    && target_hash != B256::ZERO

View on GitHub (pinned to 18893faf8b)

Solutions

1. Use one of the supported proxy kinds in the manifest
2. Remove the proxy entry if the contract is not a proxy

When it happens

Trigger: Thrown at crates/adapters/blockchain/src/rpc/verification.rs:1284 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of nautechsystems/nautilus_trader@18893faf8b (2026-09-08). Data as JSON: /api/errors/0a285b92d8fd54b6. Report an issue: GitHub.