- Closes AC-920
- Constructs the anchor transaction in the executor; the governor is only responsible for signing and sending it
- Includes a receipt for every anchor received from other subnets in the outgoing anchor transaction
- Adds a synthetic transaction ledger account, which tracks the status of produced synthetic transactions
- Builds a partial receipt for each synthetic transaction and stores it in the synthetic transaction ledger
- Uses the anchor receipt from the DN to complete the receipt for each synthetic transaction
- Sends out synthetic transactions with a complete receipt