Distribution Precompile

Address: 0x0000000000000000000000000000000000001007

The distribution precompile provides EVM access to Cosmos SDK’s distribution module. Smart contracts can manage staking rewards, validator commissions, and withdrawal addresses. This precompile is essential for DeFi applications that need to handle staking rewards programmatically.

Key Features

Reward Management: Withdraw delegation rewards from validators
Commission Handling: Validators can withdraw earned commissions
Batch Operations: Withdraw from multiple validators efficiently
Flexible Withdrawals: Set custom withdrawal addresses
Comprehensive Queries: Access detailed reward information

Interface Overview


interface IDistr {
    // Transaction Methods
    function setWithdrawAddress(address withdrawAddr) external returns (bool);
    function withdrawDelegationRewards(string memory validator) external returns (bool);
    function withdrawMultipleDelegationRewards(string[] memory validators) external returns (bool);
    function withdrawValidatorCommission(string memory validator) external returns (bool);
 
    // Query Methods
    function rewards(address delegatorAddress) external view returns (Rewards);
}

Transaction Methods

setWithdrawAddress

Sets the withdrawal address for staking rewards. By default, rewards are sent to the delegator’s address, but this can be customized.


function setWithdrawAddress(address withdrawAddr) external returns (bool success);

Parameters:

withdrawAddr: EVM address where future rewards should be sent

Gas Cost: ~30,000 gas

Example:


// Set rewards to go to a treasury contract
bool success = DISTR_CONTRACT.setWithdrawAddress(0x742d35Cc6634C0532925a3b8D4C9db96590c6C8C);
require(success, "Failed to set withdraw address");

withdrawDelegationRewards

Withdraws accumulated rewards from a specific validator.


function withdrawDelegationRewards(string memory validator) external returns (bool success);

Parameters:

validator: Sei validator address (e.g., “seivaloper1…”)

Gas Cost: ~50,000-80,000 gas (varies by reward amount)

Example:


string memory validator = "seivaloper1xyz...";
bool success = DISTR_CONTRACT.withdrawDelegationRewards(validator);
require(success, "Failed to withdraw rewards");

withdrawMultipleDelegationRewards

Efficiently withdraws rewards from multiple validators in a single transaction.


function withdrawMultipleDelegationRewards(string[] memory validators) external returns (bool success);

Parameters:

validators: Array of Sei validator addresses

Gas Cost: ~40,000 + (30,000 × number of validators)

Example:


string[] memory validators = new string[](3);
validators[0] = "seivaloper1abc...";
validators[1] = "seivaloper1def...";
validators[2] = "seivaloper1ghi...";
 
bool success = DISTR_CONTRACT.withdrawMultipleDelegationRewards(validators);
require(success, "Failed to withdraw multiple rewards");

Batch Efficiency: Using withdrawMultipleDelegationRewards is significantly more gas-efficient than multiple individual calls, especially when withdrawing from 3+ validators.

withdrawValidatorCommission

Allows validators to withdraw their earned commission. Only callable by the validator operator.


function withdrawValidatorCommission(string memory validator) external returns (bool success);

Parameters:

validator: Sei validator address (must match caller’s validator)

Gas Cost: ~60,000-90,000 gas

Example:


// Only works if caller is the validator operator
string memory myValidator = "seivaloper1myvalidator...";
bool success = DISTR_CONTRACT.withdrawValidatorCommission(myValidator);
require(success, "Failed to withdraw commission");

Validator Only: This method can only be called by the validator’s operator address. Attempting to withdraw commission for a validator you don’t operate will fail.

Query Methods

rewards

Retrieves comprehensive reward information for a delegator across all validators.


function rewards(address delegatorAddress) external view returns (Rewards rewards);

Data Structures:


struct Coin {
    uint256 amount;    // Token amount in 18 decimal precision (DecCoins)
    uint256 decimals;  // Always 18 - decimal precision for the amount
    string denom;      // Token denomination (e.g., "usei")
}
 
struct Reward {
    Coin[] coins;              // Reward coins from this validator
    string validator_address;  // Validator's Sei address
}
 
struct Rewards {
    Reward[] rewards;  // Per-validator breakdown
    Coin[] total;      // Total rewards across all validators
}

Critical: Decimal Precision for Rewards

The rewards() query returns amounts with 18 decimal precision (DecCoins from Cosmos SDK).

This is different from the actual withdrawn reward amounts, which use 6 decimal precision (sdk.Coins).

To convert pending rewards to SEI for display:


const pendingRewardsSei = amount / 1e18; // rewards() query uses 18 decimals

Withdrawn rewards are in usei (6 decimals):


const withdrawnSei = withdrawnAmount / 1e6; // actual withdrawals use 6 decimals

Example:


Rewards memory userRewards = DISTR_CONTRACT.rewards(msg.sender);
 
// Check total rewards - uses 18 decimal precision
for (uint i = 0; i < userRewards.total.length; i++) {
    Coin memory coin = userRewards.total[i];
    // coin.decimals is always 18 for rewards
    uint256 displayAmount = coin.amount / (10 ** coin.decimals);
    // Process reward amount for coin.denom
}
 
// Check per-validator rewards
for (uint i = 0; i < userRewards.rewards.length; i++) {
    Reward memory reward = userRewards.rewards[i];
    // Process rewards from reward.validator_address
}

Understanding Decimal Precision

The distribution precompile has different decimal precision for queries vs actual withdrawals due to how rewards are tracked in the Cosmos SDK:

Function	Type	Decimal Precision	Conversion to SEI
rewards()	Query (pending rewards)	18 decimals (DecCoins)	`amount / 1e18`
withdrawDelegationRewards()	Withdrawn amount (event)	6 decimals (usei)	`amount / 1e6`
withdrawMultipleDelegationRewards()	Withdrawn amount (event)	6 decimals (usei)	`amount / 1e6`
withdrawValidatorCommission()	Withdrawn amount (event)	6 decimals (usei)	`amount / 1e6`

Why Different Precisions?

Pending Rewards (18 decimals): The Cosmos SDK tracks pending rewards using DecCoins (decimal coins) with 18 decimal precision for higher accuracy during reward accumulation.
Withdrawn Rewards (6 decimals): When rewards are actually withdrawn, they are converted to sdk.Coins (usei) with 6 decimal precision to match Sei’s native token units.

Conversion Helper Functions


// Convert pending rewards (18 decimals) to SEI
function pendingRewardsToSei(amount: bigint): number {
  return Number(amount) / 1e18;
}
 
// Convert withdrawn rewards (6 decimals) to SEI
function withdrawnRewardsToSei(amount: bigint): number {
  return Number(amount) / 1e6;
}
 
// Example usage
const pendingRewards = await distrContract.rewards(delegatorAddress);
const pendingSei = pendingRewardsToSei(pendingRewards.total[0].amount);
console.log(`Pending rewards: ${pendingSei} SEI`);

Note: When reconciling pending rewards with actual withdrawals, be aware of the 12-decimal difference (10^12 factor) between query results and withdrawal amounts.

Practical Examples

DeFi Yield Aggregator


contract YieldAggregator {
    IDistr constant DISTR = IDistr(0x0000000000000000000000000000000000001007);
 
    mapping(address => string[]) public userValidators;
 
    function harvestRewards() external {
        string[] memory validators = userValidators[msg.sender];
        require(validators.length > 0, "No validators to harvest from");
 
        // Efficiently withdraw from all validators
        bool success = DISTR.withdrawMultipleDelegationRewards(validators);
        require(success, "Harvest failed");
 
        // Additional logic to compound or distribute rewards
    }
 
    function checkPendingRewards(address user) external view returns (uint256 totalSei) {
        Rewards memory rewards = DISTR.rewards(user);
 
        for (uint i = 0; i < rewards.total.length; i++) {
            if (keccak256(bytes(rewards.total[i].denom)) == keccak256(bytes("usei"))) {
                totalSei = rewards.total[i].amount;
                break;
            }
        }
    }
}

Validator Commission Manager


contract ValidatorManager {
    IDistr constant DISTR = IDistr(0x0000000000000000000000000000000000001007);
 
    string public validatorAddress;
    address public treasury;
 
    constructor(string memory _validator, address _treasury) {
        validatorAddress = _validator;
        treasury = _treasury;
 
        // Set commission withdrawals to go to treasury
        DISTR.setWithdrawAddress(treasury);
    }
 
    function withdrawCommission() external {
        bool success = DISTR.withdrawValidatorCommission(validatorAddress);
        require(success, "Commission withdrawal failed");
    }
}

Error Handling

Common error scenarios and how to handle them:


contract SafeDistribution {
    IDistr constant DISTR = IDistr(0x0000000000000000000000000000000000001007);
 
    function safeWithdrawRewards(string memory validator) external returns (bool) {
        // Check if there are rewards to withdraw first
        Rewards memory rewards = DISTR.rewards(msg.sender);
 
        bool hasRewards = false;
        for (uint i = 0; i < rewards.rewards.length; i++) {
            if (keccak256(bytes(rewards.rewards[i].validator_address)) ==
                keccak256(bytes(validator))) {
                hasRewards = rewards.rewards[i].coins.length > 0;
                break;
            }
        }
 
        if (!hasRewards) {
            return false; // No rewards to withdraw
        }
 
        try DISTR.withdrawDelegationRewards(validator) returns (bool success) {
            return success;
        } catch {
            return false; // Handle withdrawal failure gracefully
        }
    }
}

Gas Optimization Tips

Batch Operations: Use withdrawMultipleDelegationRewards for multiple validators
Check Before Withdraw: Query rewards first to avoid unnecessary transactions
Set Withdraw Address Once: Avoid repeated setWithdrawAddress calls
Commission Timing: Withdraw validator commission when amounts are substantial

Integration Patterns

Auto-Compounding Strategy


// Automatically reinvest rewards back into staking
function autoCompound() external {
    // 1. Withdraw rewards
    DISTR.withdrawMultipleDelegationRewards(getMyValidators());
 
    // 2. Use staking precompile to re-delegate
    // (Implementation depends on staking precompile integration)
}

Treasury Management


// Route all rewards to a DAO treasury
function setupTreasuryWithdrawals(address treasury) external onlyOwner {
    DISTR.setWithdrawAddress(treasury);
}

View the complete distribution precompile source code and ABI here .