Terraswap: Common Types

This is a collection of common types and the queriers which are commonly used in terraswap contracts.

Data Types

AssetInfo

AssetInfo is a convience wrapper to represent the native token and the contract token as a single type.

#[serde(rename_all = "snake_case")]
pub enum AssetInfo {
    Token { contract_addr: HumanAddr },
    NativeToken { denom: String },
}

Asset

It contains asset info with the amount of token.

pub struct Asset {
    pub info: AssetInfo,
    pub amount: Uint128,
}

PairInfo

It is used to represent response data of Pair-Info-Querier

pub struct PairInfo {
    pub asset_infos: [AssetInfo; 2],
    pub contract_addr: String,
    pub liquidity_token: String,
    pub asset_decimals: [u8; 2],
}

Queriers

Native Token Balance Querier

It uses CosmWasm standard interface to query the account balance to chain.

pub fn query_balance(
    querier: &QuerierWrapper,
    account_addr: Addr,
    denom: String,
) -> StdResult<Uint128>

Token Balance Querier

It provides simliar query interface with Native-Token-Balance-Querier for CW20 token balance.

pub fn query_token_balance(
    querier: &QuerierWrapper,
    contract_addr: Addr,
    account_addr: Addr,
) -> StdResult<Uint128>

Token Info Querier

It provides token info querier for CW20 token contract.

pub fn query_token_info(
    querier: &QuerierWrapper,
    contract_addr: Addr,
) -> StdResult<TokenInfoResponse>

Native Token Deimals Querier

It provides native token decimals querier for factory contract.

pub fn query_native_decimals(
    querier: &QuerierWrapper,
    factory_contract: Addr,
    denom: String,
) -> StdResult<u8>

Pair Info Querier From Factory

It also provides the query interface to query avaliable terraswap pair contract info. Any contract can query pair info to terraswap factory contract.

pub fn query_pair_info(
    querier: &QuerierWrapper,
    factory_contract: Addr,
    asset_infos: &[AssetInfo; 2],
) -> StdResult<PairInfo>

Pair Info Querier From Pair

It also provides the query interface to query avaliable terraswap pair contract info. Any contract can query pair info to pair contract.

pub fn query_pair_info_from_pair(
    querier: &QuerierWrapper,
    pair_contract: Addr,
) -> StdResult<PairInfo>