Jędrzej Stuczyński
69 lines
2.2 KiB
Rust
69 lines
2.2 KiB
Rust
// Copyright 2024 - Nym Technologies SA <contact@nymtech.net>
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// SPDX-License-Identifier: Apache-2.0
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/// Specifies the maximum validity of the issued ticketbooks.
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pub const TICKETBOOK_VALIDITY_DAYS: u32 = 7;
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/// Specifies the number of tickets in each issued ticketbook.
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pub const TICKETBOOK_SIZE: u64 = 50;
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/// This type is defined mostly for the purposes of having constants (like sizes) associated with given variants
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/// It's not meant to be serialised or have any fancy traits defined on it (in this crate)
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#[derive(Default, Copy, Clone, Debug, PartialEq)]
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#[repr(u8)]
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pub enum TicketTypeRepr {
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#[default]
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V1MixnetEntry = 0,
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V1MixnetExit = 1,
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V1WireguardEntry = 2,
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V1WireguardExit = 3,
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}
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impl TicketTypeRepr {
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pub const WIREGUARD_ENTRY_TICKET_SIZE: u64 = 500 * 1024 * 1024; // 500 MB
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// TBD:
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pub const WIREGUARD_EXIT_TICKET_SIZE: u64 = Self::WIREGUARD_ENTRY_TICKET_SIZE;
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pub const MIXNET_ENTRY_TICKET_SIZE: u64 = Self::WIREGUARD_ENTRY_TICKET_SIZE;
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pub const MIXNET_EXIT_TICKET_SIZE: u64 = Self::WIREGUARD_ENTRY_TICKET_SIZE;
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/// How much bandwidth (in bytes) one ticket can grant
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pub const fn bandwidth_value(&self) -> u64 {
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match self {
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TicketTypeRepr::V1MixnetEntry => Self::MIXNET_ENTRY_TICKET_SIZE,
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TicketTypeRepr::V1MixnetExit => Self::MIXNET_EXIT_TICKET_SIZE,
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TicketTypeRepr::V1WireguardEntry => Self::WIREGUARD_ENTRY_TICKET_SIZE,
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TicketTypeRepr::V1WireguardExit => Self::WIREGUARD_EXIT_TICKET_SIZE,
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}
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}
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}
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// Constants for bloom filter for double spending detection
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//Chosen for FP of
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//Calculator at https://hur.st/bloomfilter/
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pub const ECASH_DS_BLOOMFILTER_PARAMS: BloomfilterParameters = BloomfilterParameters {
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num_hashes: 10,
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bitmap_size: 1_500_000_000,
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sip_keys: [
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(12345678910111213141, 1415926535897932384),
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(7182818284590452353, 3571113171923293137),
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],
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};
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#[derive(Copy, Clone, Debug, PartialEq, Eq, Hash)]
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pub struct BloomfilterParameters {
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pub num_hashes: u32,
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pub bitmap_size: u64,
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pub sip_keys: [(u64, u64); 2],
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}
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impl BloomfilterParameters {
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pub const fn byte_size(&self) -> u64 {
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self.bitmap_size / 8
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}
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pub const fn default_ecash() -> Self {
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ECASH_DS_BLOOMFILTER_PARAMS
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}
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}
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