rgb20 0.9.0

RGB-20 Library: fungible digital assets for bitcoin & lightning
Documentation 
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// RGB20 Library: high-level API to RGB fungible assets.
// Written in 2019-2022 by
//     Dr. Maxim Orlovsky <orlovsky@lnp-bp.org>
//
// To the extent possible under law, the author(s) have dedicated all copyright
// and related and neighboring rights to this software to the public domain
// worldwide. This software is distributed without any warranty.
//
// You should have received a copy of the MIT License along with this software.
// If not, see <https://opensource.org/licenses/MIT>.

use std::collections::BTreeMap;

use bitcoin::OutPoint;
use chrono::Utc;
use lnpbp::chain::Chain;
use rgb::fungible::allocation::{AllocationMap, OutpointValueMap, OutpointValueVec};
use rgb::{
    data, secp256k1zkp, value, Assignment, Consignment, Contract, Genesis, SealValueMap,
    TypedAssignments,
};
use seals::txout::CloseMethod;
use stens::AsciiString;

use crate::schema;
use crate::schema::{FieldType, OwnedRightType};

/// Extension trait for consignments defining RGB20-specific API.
#[allow(clippy::too_many_arguments)]
pub trait Rgb20<'consignment>: Consignment<'consignment> {
    /// Performs primary asset issue, producing [`Contract`] consignment.
    fn create_rgb20(
        chain: Chain,
        ticker: AsciiString,
        name: AsciiString,
        precision: u8,
        allocations: OutpointValueVec,
        inflation: OutpointValueMap,
        method: CloseMethod,
        renomination: Option<OutPoint>,
        epoch: Option<OutPoint>,
    ) -> Contract;
}

impl<'consignment> Rgb20<'consignment> for Contract {
    fn create_rgb20(
        chain: Chain,
        ticker: AsciiString,
        name: AsciiString,
        precision: u8,
        allocations: OutpointValueVec,
        inflation: OutpointValueMap,
        method: CloseMethod,
        renomination: Option<OutPoint>,
        epoch: Option<OutPoint>,
    ) -> Contract {
        let now = Utc::now().timestamp();
        let mut metadata = type_map! {
            FieldType::Ticker => field!(AsciiString, ticker),
            FieldType::Name => field!(AsciiString, name),
            FieldType::Precision => field!(U8, precision),
            FieldType::Timestamp => field!(I64, now)
        };

        let issued_supply = allocations.iter().map(|v| v.value).sum();
        let mut owned_rights = BTreeMap::new();
        owned_rights.insert(
            OwnedRightType::Assets.into(),
            TypedAssignments::zero_balanced(
                vec![value::Revealed {
                    value: issued_supply,
                    blinding: secp256k1zkp::key::ONE_KEY.into(),
                }],
                allocations
                    .into_iter()
                    .map(|outpoint_value| {
                        (
                            rgb::seal::Revealed::new(method, outpoint_value.outpoint),
                            outpoint_value.value,
                        )
                    })
                    .collect(),
                empty![],
            ),
        );
        metadata.insert(FieldType::IssuedSupply.into(), field!(U64, issued_supply));

        if !inflation.is_empty() {
            owned_rights.insert(
                OwnedRightType::Inflation.into(),
                inflation
                    .into_iter()
                    .map(|(outpoint, value)| (rgb::seal::Revealed::new(method, outpoint), value))
                    .collect::<SealValueMap>()
                    .into_assignments(),
            );
        }

        if let Some(outpoint) = renomination {
            owned_rights.insert(
                OwnedRightType::Renomination.into(),
                TypedAssignments::Void(vec![Assignment::Revealed {
                    seal: outpoint.into(),
                    state: data::Void(),
                }]),
            );
        }

        if let Some(outpoint) = epoch {
            owned_rights.insert(
                OwnedRightType::BurnReplace.into(),
                TypedAssignments::Void(vec![Assignment::Revealed {
                    seal: outpoint.into(),
                    state: data::Void(),
                }]),
            );
        }

        let schema = schema::schema();

        let genesis = Genesis::with(
            schema.schema_id(),
            chain,
            metadata.into(),
            owned_rights,
            bset![],
        );

        Contract::with(schema, None, genesis, empty!(), empty!(), empty!())
    }
}