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use std::collections::BTreeSet;
use chrono::prelude::*;
use wallet::hd::{Bip43, HardenedIndex, SegmentIndexes};
use super::{DerivationType, PublicNetwork, SpendingCondition};
use crate::model::{DescriptorClass, SigsReq};
#[derive(Copy, Clone, Ord, PartialOrd, Eq, PartialEq, Hash, Debug)]
pub enum Requirement {
Allow,
Require,
Deny,
}
impl Default for Requirement {
fn default() -> Self { Requirement::Allow }
}
#[derive(Clone, Eq, PartialEq, Hash, Debug)]
pub struct WalletTemplate {
pub default_derivation: DerivationType,
pub descriptor_class: DescriptorClass,
pub min_signer_count: u16,
pub max_signer_count: Option<u16>,
pub hardware_req: Requirement,
pub watch_only_req: Requirement,
pub conditions: BTreeSet<(u8, SpendingCondition)>,
pub network: PublicNetwork,
}
impl WalletTemplate {
pub fn singlesig(
descriptor_class: DescriptorClass,
network: PublicNetwork,
require_hardware: bool,
) -> WalletTemplate {
let format = descriptor_class.bip43(1);
let hardware_req = match require_hardware {
true => Requirement::Require,
false => Requirement::Deny,
};
let watch_only_req = match require_hardware {
true => Requirement::Deny,
false => Requirement::Require,
};
WalletTemplate {
default_derivation: format.into(),
descriptor_class,
min_signer_count: 1,
max_signer_count: Some(1),
hardware_req,
watch_only_req,
conditions: bset![(0, SpendingCondition::default())],
network,
}
}
pub fn hodling(
descriptor_class: DescriptorClass,
network: PublicNetwork,
sigs_required: u16,
hardware_req: Requirement,
watch_only_req: Requirement,
) -> WalletTemplate {
let now = Utc::now();
if sigs_required < 3 {
unreachable!("WalletTemplate::hodling must require at least 3 signers")
}
let conditions = bset![
(1, SpendingCondition::all()),
(
2,
SpendingCondition::anybody_after_date(now.with_year(now.year() + 5).unwrap())
)
];
WalletTemplate {
default_derivation: Bip43::multisig_descriptor().into(),
descriptor_class,
min_signer_count: sigs_required,
max_signer_count: None,
hardware_req,
watch_only_req,
conditions,
network,
}
}
pub fn multisig(
descriptor_class: DescriptorClass,
network: PublicNetwork,
sigs_required: Option<u16>,
hardware_req: Requirement,
watch_only_req: Requirement,
) -> WalletTemplate {
let now = Utc::now();
let conditions = match sigs_required {
None => bset![(0, SpendingCondition::default())],
Some(0) | Some(1) => unreachable!("WalletTemplate::multisig must expect > 1 signature"),
Some(2) => bset![
(1, SpendingCondition::all()),
(
2,
SpendingCondition::anybody_after_date(now.with_year(now.year() + 5).unwrap())
)
],
Some(3) => bset![
(1, SpendingCondition::at_least(2)),
(
2,
SpendingCondition::anybody_after_date(now.with_year(now.year() + 5).unwrap())
)
],
Some(count) => bset![
(1, SpendingCondition::at_least(count - 1)),
(
2,
SpendingCondition::after_date(
SigsReq::AtLeast(count / 2 + count % 2),
now.with_year(now.year() + 3).unwrap(),
)
),
(
3,
SpendingCondition::anybody_after_date(now.with_year(now.year() + 5).unwrap())
)
],
};
let default_derivation = match descriptor_class {
DescriptorClass::PreSegwit => Bip43::multisig_ordered_sh(),
DescriptorClass::SegwitV0 => Bip43::multisig_segwit0(),
DescriptorClass::NestedV0 => Bip43::multisig_nested0(),
DescriptorClass::TaprootC0 => Bip43::multisig_descriptor(),
}
.into();
WalletTemplate {
default_derivation,
descriptor_class,
min_signer_count: sigs_required.unwrap_or(2),
max_signer_count: None,
hardware_req,
watch_only_req,
conditions,
network,
}
}
pub fn bip43(&self) -> Bip43 {
self.default_derivation.bip43().unwrap_or(Bip43::Bip43 {
purpose: HardenedIndex::zero(),
})
}
}
