cw20-bonding 0.9.1

Implement basic bonding curve to issue cw20 tokens
Documentation 
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use schemars::JsonSchema;
use serde::{Deserialize, Serialize};

use cosmwasm_std::Uint128;
use cw_storage_plus::Item;

use crate::curves::DecimalPlaces;
use crate::msg::CurveType;

/// Supply is dynamic and tracks the current supply of staked and ERC20 tokens.
#[derive(Serialize, Deserialize, Clone, Debug, PartialEq, JsonSchema, Default)]
pub struct CurveState {
    /// reserve is how many native tokens exist bonded to the validator
    pub reserve: Uint128,
    /// supply is how many tokens this contract has issued
    pub supply: Uint128,

    // the denom of the reserve token
    pub reserve_denom: String,

    // how to normalize reserve and supply
    pub decimals: DecimalPlaces,
}

impl CurveState {
    pub fn new(reserve_denom: String, decimals: DecimalPlaces) -> Self {
        CurveState {
            reserve: Uint128::zero(),
            supply: Uint128::zero(),
            reserve_denom,
            decimals,
        }
    }
}

pub const CURVE_STATE: Item<CurveState> = Item::new("curve_state");

pub const CURVE_TYPE: Item<CurveType> = Item::new("curve_type");