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///////////////////////////////////////////////////////////////////////////////
//
//  Copyright 2018-2023 Robonomics Network <research@robonomics.network>
//
//  Licensed under the Apache License, Version 2.0 (the "License");
//  you may not use this file except in compliance with the License.
//  You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
//  Unless required by applicable law or agreed to in writing, software
//  distributed under the License is distributed on an "AS IS" BASIS,
//  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
//  See the License for the specific language governing permissions and
//  limitations under the License.
//
///////////////////////////////////////////////////////////////////////////////
//! A set of constant values used in substrate runtime.

/// Money matters.
pub mod currency {
    use robonomics_primitives::Balance;

    pub const COASE: Balance = 1_000;
    pub const GLUSHKOV: Balance = 1_000 * COASE;
    pub const XRT: Balance = 1_000 * GLUSHKOV;

    pub const fn deposit(items: u32, bytes: u32) -> Balance {
        items as Balance * 150 * GLUSHKOV + (bytes as Balance) * 60 * GLUSHKOV
    }
}

/// Time.
pub mod time {
    use robonomics_primitives::{BlockNumber, Moment};

    /// Since BABE is probabilistic this is the average expected block time that
    /// we are targetting. Blocks will be produced at a minimum duration defined
    /// by `SLOT_DURATION`, but some slots will not be allocated to any
    /// authority and hence no block will be produced. We expect to have this
    /// block time on average following the defined slot duration and the value
    /// of `c` configured for BABE.
    /// This value is only used indirectly to define the unit constants below
    /// that are expressed in blocks. The rest of the code should use
    /// `SLOT_DURATION` instead (like the timestamp module for calculating the
    /// minimum period).
    /// <https://research.web3.foundation/en/latest/polkadot/BABE/Babe/#6-practical-results>
    pub const MILLISECS_PER_BLOCK: Moment = 4000;
    pub const SECS_PER_BLOCK: Moment = MILLISECS_PER_BLOCK / 1000;

    pub const SLOT_DURATION: Moment = MILLISECS_PER_BLOCK;

    // 1 in 4 blocks (on average, not counting collisions) will be primary BABE blocks.
    pub const PRIMARY_PROBABILITY: (u64, u64) = (1, 4);

    pub const EPOCH_DURATION_IN_BLOCKS: BlockNumber = 10 * MINUTES;
    pub const EPOCH_DURATION_IN_SLOTS: u64 = {
        const SLOT_FILL_RATE: f64 = MILLISECS_PER_BLOCK as f64 / SLOT_DURATION as f64;

        (EPOCH_DURATION_IN_BLOCKS as f64 * SLOT_FILL_RATE) as u64
    };

    pub const MINUTES: BlockNumber = 60 / (SECS_PER_BLOCK as BlockNumber);
    pub const HOURS: BlockNumber = MINUTES * 60;
    pub const DAYS: BlockNumber = HOURS * 24;
}

// CRITICAL NOTE: The system module maintains two constants: a _maximum_ block weight and a
// _ratio_ of it yielding the portion which is accessible to normal transactions (reserving the rest
// for operational ones). `TARGET_BLOCK_FULLNESS` is entirely independent and the system module is
// not aware of if, nor should it care about it. This constant simply denotes on which ratio of the
// _maximum_ block weight we tweak the fees. It does NOT care about the type of the dispatch.
//
// For the system to be configured in a sane way, `TARGET_BLOCK_FULLNESS` should always be less than
// the ratio that `system` module uses to find normal transaction quota.
/// Fee-related.
pub mod fee {
    pub use sp_runtime::Perbill;

    /// The block saturation level. Fees will be updates based on this value.
    pub const TARGET_BLOCK_FULLNESS: Perbill = Perbill::from_percent(25);
}