The settings-tp command starts the Settings transaction processor, which provides a methodology for storing on-chain configuration settings.

Note: This transaction processor is required in order to apply changes to on-chain settings.

The settings stored in state as a result of this transaction family play a critical role in the operation of a validator. For example, the consensus module uses these settings. In the case of PoET, one cross-network setting is target wait time (which must be the same across validators), that is stored as sawtooth.poet.target_wait_time. Other parts of the system use these settings similarly; for example, the list of enabled transaction families is used by the transaction processing platform. In addition, pluggable components such as transaction family implementations can use the settings during their execution.

This design supports two authorization options: either a single authorized key that can make changes or multiple authorized keys. In the case of multiple keys, a percentage of votes signed by the keys is required to make a change. Note that only the keys in are allowed to submit setting transactions.

usage: settings-tp [-h] [-C CONNECT] [-v] [-V]

Starts a Settings transaction processor (settings-tp).

optional arguments:
  -h, --help            show this help message and exit
  -C CONNECT, --connect CONNECT
                        specify the endpoint for the validator connection
                        (default: tcp://localhost:4004)
  -v, --verbose         enable more verbose output to stderr
  -V, --version         display version information

This process is required to apply any changes to on-chain settings used by the Sawtooth platform.