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Choose how writes return:
  • FAST (default): also waits for finalization, then returns the transaction hash as a string
  • FINAL: waits for finalization and returns a structured result
Outputs:
  • FAST returns a string tx-hash like 0x4a8b...9f.
  • FINAL returns the receipt attributes, including extrinsic_hash, block_hash and finalized.
The status progression (BROADCAST, IN_BLOCK, FINALIZED) is only printed when you pass an on_status callback, as shown on Status Callbacks.