Inconsistent Behavior When Querying Unconfirmed Transaction Inputs

[mgpai22]

I encountered unexpected behavior while querying inputs of chained unconfirmed transactions in the mempool.

Scenario:

• Unconfirmed Tx1:

  • Inputs: [A, B]
  • Outputs: [C, D]

• Unconfirmed Tx2:

  • Inputs: [C, D]
  • Outputs: [E, F]

Both transactions are chained within the mempool.

Observed Behavior:

• Inputs A, B:

  • Query successful via endpoints:

  • /utxo/byId

  • /blockchain/box/byId

  • /transactions/unconfirmed/inputs/byBoxId

• Inputs C, D (unconfirmed):

  • Query fails via endpoint:

    • /transactions/unconfirmed/inputs/byBoxId (unexpected)

  • Query correctly fails via endpoints:

    • /utxo/byId
    • /blockchain/box/byId

  • Query succeeds via endpoints:

    • /utxo/withPool/byId
    • /transactions/unconfirmed/outputs/byBoxId

Expected Behavior:

Chained unconfirmed inputs (C, D) should be retrievable via /transactions/unconfirmed/inputs/byBoxId.