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Auction RPC and State-Propagation Diagnostic

magicblock/AUCTION_RPC_TIMING_DIAGNOSTIC_20260810.md

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Auction RPC and State-Propagation Diagnostic

Status: RPC_AND_PERMISSION_VISIBILITY_VERIFIED

No Rust business logic was changed in this diagnostic.

Endpoints actually used

  • Base HTTP: https://api.devnet.solana.com
  • Base WebSocket pairing: wss://api.devnet.solana.com
  • ER HTTP: not used in this flow
  • ER WebSocket: not used in this flow
  • TEE HTTP origin: https://devnet-tee.magicblock.app
  • TEE authenticated HTTP: https://devnet-tee.magicblock.app?token=<redacted>
  • TEE authenticated WebSocket: wss://devnet-tee.magicblock.app?token=<redacted>

The Base RPC is the public Solana Devnet endpoint. Private-runtime instructions are sent only through the authenticated TEE connection.

Connection by step

StepConnection
initializeBase
authorize biddersBase
activateBase
delegateBase, validator MTEWGuqxUpYZGFJQcp8tLN7x5v9BSeoFHYWQQ3n3xzo
init_permissionauthenticated TEE
set_privateauthenticated TEE
submit_private_bidauthenticated TEE, one connection per bidder
closeauthenticated TEE
commit/undelegateauthenticated TEE

Propagation observations

After init_permission, polling used bounded exponential backoff. Observed:

  • TEE permission owner: ACLseoPoyC3cBqoUtkbjZ4aDrkurZW86v19pXz2XQnp1
  • TEE permission data length: 68
  • TEE session owner: auction program
  • Base permission: null
  • Base session owner: delegation program

After set_private, polling observed:

  • TEE permission owner: ACLseoPoyC3cBqoUtkbjZ4aDrkurZW86v19pXz2XQnp1
  • TEE permission data length: 167, the expected size for the authority plus two bidder members
  • Base permission: null

The bid was submitted only after this state was visible. The failure remained unchanged.

Sequential runs

Three runs were executed sequentially, never in parallel, using fresh auction/session PDAs and the public Base RPC:

  • Run 1: permission propagation passed; first private bid failed with InvalidWritableAccount.
  • Run 2: permission propagation passed; first private bid failed with InvalidWritableAccount.
  • Run 3: timed out in the Base setup phase; it did not reach permission or bidding.

Raw redacted run log: docs/magicblock/AUCTION_RPC_TIMING_DIAGNOSTIC_20260810.log

Root cause isolated

SubmitPrivateBid declares config as writable in programs/privatedao-auction/src/lib.rs, although the handler only reads it. The ordered accounts are bidder, config, session, authorization; the runtime error identifies account index 1, matching config.

The delegated session is the state being written. The non-delegated config must not be included as writable in the private-runtime transaction. This is an account-meta/program declaration issue, not endpoint routing or state-propagation timing.

No Rust change was made pending owner approval of this isolated finding.