Reward

The Reward contract handles the distribution of Ethereum 2.0 staking rewards to holders of CW20 bETH. Ethereum 2.0 staking rewards (which are first converted to TerraUSD via Ethereum AMM protocols) are transferred over to the Reward contract, which are subsequently distributed to holders of bETH. bETH holders can send a request to this contract to claim their accrued rewards.

The Reward contract also stores the balance and reward index values for all bETH holders, which is used to calculate the amount of bETH rewards that a specific holder has accrued.

Contract State

Config

Stores information about the contract configuration.

#[derive(Serialize, Deserialize, Clone, Debug, PartialEq, JsonSchema)]
pub struct Config {
    pub owner: CanonicalAddr,
    pub token_contract: Option<CanonicalAddr>,
    pub reward_denom: String,
}

Key	Type	Description
owner	CanonicalAddr	Address of contract owner
token_contract*	CanonicalAddr	Contract address of bETH Token
reward_denom	String	Native token denomination for distributed bETH rewards

* = not stored until value registered

State

Stores information about the contract state.

Rust

#[derive(Serialize, Deserialize, Clone, Debug, PartialEq, JsonSchema)]
pub struct State {
    pub global_index: Decimal,
    pub total_balance: Uint128,
    pub prev_reward_balance: Uint128,
}

JSON

Key	Type	Description
global_index	Decimal	Current global reward index of bETH
total_balance	Uint128	Total bETH balance of all holders
prev_reward_balance	Uint128	TerraUSD balance of Reward contract at the time of last global index update

Holder

Stores information for a specific bETH holder.

Rust

#[derive(Serialize, Deserialize, Clone, Debug, PartialEq, JsonSchema)]
pub struct Holder {
    pub balance: Uint128,
    pub index: Decimal,
    pub pending_rewards: Decimal,
}

JSON

Key	Type	Description
balance	Uint128	bETH balance of holder
index	Decimal	Holder's reward index value
pending_rewards	Decimal	Amount of holder's pending rewards

InstantiateMsg

Rust

#[derive(Serialize, Deserialize, Clone, Debug, PartialEq, JsonSchema)]
pub struct InstantiateMsg {
    pub owner: String, 
    pub reward_denom: String, 
}

JSON

Key	Type	Description
owner	String	Address of contract owner
reward_denom	String	Native token denomination for distributed bETH rewards

ExecuteMsg

PostInitialize

Registers the bETH Token contract address.

Rust

#[derive(Serialize, Deserialize, Clone, Debug, PartialEq, JsonSchema)]
#[serde(rename_all = "snake_case")]
pub enum ExecuteMsg {
    PostInitialize {
        token_contract: String, 
    }
}

JSON

Key	Type	Description
token_contract	String	Address of bETH Token

UpdateConfig

Updates the Reward contract configuration.

Rust

#[derive(Serialize, Deserialize, Clone, Debug, PartialEq, JsonSchema)]
#[serde(rename_all = "snake_case")]
pub enum ExecuteMsg {
    UpdateConfig {
        owner: String, 
    }
}

JSON

Key	Type	Description
owner	String	Address of new owner

ClaimRewards

Claims bETH holder's accrued rewards to the specified address. Sends rewards to message sender if the recipient is not specified.

Rust

#[derive(Serialize, Deserialize, Clone, Debug, PartialEq, JsonSchema)]
#[serde(rename_all = "snake_case")]
pub enum ExecuteMsg {
    ClaimRewards {
        recipient: Option<String>, 
    }
}

JSON

Key	Type	Description
recipient*	String	Recipient address of claimed bETH rewards

* = optional

[Internal] IncreaseBalance

Increases stored user's bETH balance. Stores user's accrued rewards to pending rewards and updates user's reward index to the current global reward index. Can only be issued by Token.

Rust

#[derive(Serialize, Deserialize, Clone, Debug, PartialEq, JsonSchema)]
#[serde(rename_all = "snake_case")]
pub enum ExecuteMsg {
    IncreaseBalance {
        address: String, 
        amount: Uint128,  
    }
}

JSON

Key	Type	Description
address	String	Address of user whose balance has increased
amount	Uint128	Amount of bETH balance increased

[Internal] DecreaseBalance

Decreases stored user's bETH balance. Stores user's accrued rewards to pending rewards and updates user's reward index to the current global reward index. Can only be issued byToken.

Rust

#[derive(Serialize, Deserialize, Clone, Debug, PartialEq, JsonSchema)]
#[serde(rename_all = "snake_case")]
pub enum ExecuteMsg {
    DecreaseBalance {
        address: String, 
        amount: Uint128, 
    }
}

JSON

Key	Type	Description
address	String	Address of user whose balance has decreased
amount	Uint128	Amount of bETH balance decreased

QueryMsg

Config

Gets the contract configuration of bETH Reward.

Rust

Request

#[derive(Serialize, Deserialize, Clone, Debug, PartialEq, JsonSchema)]
#[serde(rename_all = "snake_case")]
pub enum QueryMsg {
    Config {}
}

Key	Type	Description

Response

#[derive(Serialize, Deserialize, Clone, Debug, PartialEq, JsonSchema)]
pub struct ConfigResponse {
    pub owner: String, 
    pub reward_denom: String, 
    pub token_contract: Option<String>, 
}

Key	Type	Description
owner	String	Address of contract owner
reward_denom	String	Native token denomination for distributed bETH rewards
token_contract*	String	Contract address of bETH Token

* = optional

JSON

State

Gets information about the contract's current state.

Rust

Request

#[derive(Serialize, Deserialize, Clone, Debug, PartialEq, JsonSchema)]
#[serde(rename_all = "snake_case")]
pub enum QueryMsg {
    State {}
}

Key	Type	Description

Response

#[derive(Serialize, Deserialize, Clone, Debug, PartialEq, JsonSchema)]
pub struct StateResponse {
    pub global_index: Decimal,
    pub total_balance: Uint128,
    pub prev_reward_balance: Uint128,
}

Key	Type	Description
global_index	Decimal	Current global reward index of bETH
total_balance	Uint128	Total bETH balance of all holders
prev_reward_balance	Uint128	TerraUSD balance of the Reward contract at the time of last reward distribution

JSON

AccruedRewards

Gets the amount of rewards accrued to the specified bETH holder.

Rust

Request

#[derive(Serialize, Deserialize, Clone, Debug, PartialEq, JsonSchema)]
#[serde(rename_all = "snake_case")]
pub enum QueryMsg {
    AccruedRewards {
        address: String, 
    }
}

Key	Type	Description
address	String	Address of bETH holder

Response

#[derive(Serialize, Deserialize, Clone, Debug, PartialEq, JsonSchema)]
pub struct AccruedRewardsResponse {
    pub rewards: Uint128, 
}

Key	Type	Description
rewards	Uint128	Amount of reward_denom rewards accrued

JSON

Holder

Gets information about the specified bETH holder.

Rust

Request

#[derive(Serialize, Deserialize, Clone, Debug, PartialEq, JsonSchema)]
#[serde(rename_all = "snake_case")]
pub enum QueryMsg {
    Holder {
        address: String, 
    }
}

Key	Type	Description
address	String	Address of bETH holder

Response

#[derive(Serialize, Deserialize, Clone, Debug, PartialEq, JsonSchema)]
pub struct HolderResponse {
    pub address: String, 
    pub balance: Uint128, 
    pub index: Decimal, 
    pub pending_rewards: Decimal, 
}

Key	Type	Description
address	String	Address of bETH holder
balance	Uint128	bETH balance of holder
index	Decimal	Holder's reward index value
pending_rewards	Decimal	Amount of holder's pending rewards

JSON

Holders

Gets information about all bETH holders.

Rust

Request

#[derive(Serialize, Deserialize, Clone, Debug, PartialEq, JsonSchema)]
#[serde(rename_all = "snake_case")]
pub enum QueryMsg {
    Holders {
        start_after: Option<String>, 
        limit: Option<u32>, 
    }
}

Key	Type	Description
start_after*	String	Address of bETH holder to start query
limit*	u32	Maximum number of query entries

* = optional

Response

#[derive(Serialize, Deserialize, Clone, Debug, PartialEq, JsonSchema)]
pub struct HoldersResponse {
    pub holders: Vec<HolderResponse>, 
}

#[derive(Serialize, Deserialize, Clone, Debug, PartialEq, JsonSchema)]
pub struct HolderResponse {
    pub address: String, 
    pub balance: Uint128, 
    pub index: Decimal, 
    pub pending_rewards: Decimal, 
}

Key	Type	Description
holders	Vec<HolderResponse>	Vector of holder informations

Key	Type	Description
address	String	Address of bETH holder
balance	Uint128	bETH balance of holder
index	Decimal	Holder's reward index value
pending_rewards	Decimal	Amount of holder's pending rewards

JSON