Decree is a special [[Data element (Datum)|datum]] type used to inform the blockchain network about particular system changes. Decrees are needed for setting some of the network parameters such as size of common-network commission (and wallet for this commission), minimal signatures quantity for transaction acceptance, list of network owners (ones who can work with zerochain directly), etc. ## Decree types - `DAP_CHAIN_DATUM_DECREE_COMMON_SUBTYPE_FEE` specifies network commission and corresponding wallet address ([[Anchor]] is needed) - `DAP_CHAIN_DATUM_DECREE_COMMON_SUBTYPE_OWNERS` specifies list of network owners ([[Anchor]] is not needed) - `DAP_CHAIN_DATUM_DECREE_COMMON_SUBTYPE_OWNERS_MIN` gets minimal signatures quantity for decree acceptance ([[Anchor]] is not needed) - `DAP_CHAIN_DATUM_DECREE_COMMON_SUBTYPE_STAKE_APPROVE` confirms stake validity ([[Anchor]] is needed) - `DAP_CHAIN_DATUM_DECREE_COMMON_SUBTYPE_STAKE_INVALIDATE` invalidates stake ([[Anchor]] is needed) - `DAP_CHAIN_DATUM_DECREE_COMMON_SUBTYPE_STAKE_MIN_VALUE` sets minimal stake value to become validator ([[Anchor]] is needed) - `DAP_CHAIN_DATUM_DECREE_COMMON_SUBTYPE_STAKE_MIN_VALIDATORS_COUNT` sets minimal validators quantity for [[Block]] acceptance ([[Anchor]] is needed) - `DAP_CHAIN_DATUM_DECREE_COMMON_SUBTYPE_BAN` bans the node ([[Anchor]] is not needed) - `DAP_CHAIN_DATUM_DECREE_COMMON_SUBTYPE_UNBAN` unbans the node ([[Anchor]] is not needed) - `DAP_CHAIN_DATUM_DECREE_COMMON_SUBTYPE_REWARD` sets base reward value ([[Anchor]] is needed) Decree is an infrastructure datum, it is created in zerochain. If decree changes some parameters in mainchain then there will be created [[Anchor]] for it in the mainchain.