Sortition transaction is used to enter a validator in the committee. By committing a sortition transaction, the validator will enter the committee. Sortition transactions are valid for 7 blocks, which is defined as “sortition interval” in the consensus parameters.
The sortition transaction has a payload consists the following fields:
|48 bytes||Sortition Proof|
Validators do not need to pay a fee for sortition transactions, and the fee should be set to zero.