Midnight privacy-vault demo shows Ethereum token withdrawal requires external signers

Withdrawals from SIG Network’s experimental Ethereum vault, which holds underlying ERC20 tokens on Ethereum, require a signing network because the holder's authorization alone cannot execute the transfer. Users must first burn a shielded claim, and the subsequent external transfer needs a signature from an independent threshold of signers via an MPC service. Furthermore, failed-transfer recovery requires an attested response from the MPC service to potentially restore the claim.