Misleading transaction time when in micro block

Describe the bug A time in the past is shown for transactions in micro blocks

The time does not makes sense as it looks like that the tx is executed at the already confirmed block, more precisely, that the clarity variable block_height is the height of the confirmed block. This is not true.

To Reproduce Steps to reproduce the behavior:

1. Go to https://explorer.stacks.co/transactions?chain=testnet
2. See timestamp on microblock

Expected behavior Do not show a transaction time until the block with the block_height used during processing the transaction is confirmed on Bitcoin.

Screenshots

[JackNapolitano]

Follow up. I see that in the API code, is unanchored is being set to !dbTx.block_hash in db-controller.ts. But as we see in the response, the block_hash is not null, rather, it is "block_hash": "0x",

function parseDbAbstractTx(dbTx: DbTx, baseTx: BaseTransaction): AbstractTransaction {
  const abstractTx: AbstractTransaction = {
    ...baseTx,
    is_unanchored: !dbTx.block_hash,
    block_hash: dbTx.block_hash,

[rafaelcr]

@JackNapolitano you’re right, thanks for digging! I’ll get on it ASAP