attach_transport

WITH execution AS MATERIALIZED (
  -- Materialize run() to make its execution visible to client(execution_id).
  SELECT execution_id
  FROM run((SELECT
    -- Pin the CLIENT so this simulation uses one block.
    pin(client($transport), 'finalized') AS client,
    'attach-transport-example' AS candidate_key,
    program([
      -- Use the identity precompile for a minimal successful program.
      execute_call(
        '0x00'::ADDRESS,
        '0x04'::ADDRESS,
        '0x'::BYTES,
        0::UINT256,
        50000
      )
    ]) AS program
  ))
)
-- Attach the TRANSPORT to the retained execution CLIENT.
SELECT attach_transport(client(execution_id), $transport) AS client
FROM execution;