​
Available Precompiles

PrecompileAddressPurposeReference
Bank0x0000000000000000000000000000000000000804ERC20-style access to native Cosmos SDK tokensDetails
Bech320x0000000000000000000000000000000000000400Address format conversion between Ethereum hex and Cosmos bech32Details
Staking0x0000000000000000000000000000000000000800Validator operations, delegation, and staking rewardsDetails
Distribution0x0000000000000000000000000000000000000801Staking rewards and community pool managementDetails
ERC20Dynamic per tokenStandard ERC20 functionality for native Cosmos tokensDetails
Governance0x0000000000000000000000000000000000000805On-chain governance proposals and votingDetails
ICS200x0000000000000000000000000000000000000802Cross-chain token transfers via IBCDetails
WERC20Dynamic per tokenWrapped native token functionalityDetails
Slashing0x0000000000000000000000000000000000000806Validator slashing and jail managementDetails
P2560x0000000000000000000000000000000000000100P-256 elliptic curve cryptographic operationsDetails

​
Configuration

Precompiled contracts provide direct, gas-efficient access to native Cosmos SDK functionality from within the EVM. Build powerful hybrid applications that leverage the best of both worlds. This page provides an overview of the available precompiled contracts, each with detailed documentation on its usage, Solidity interface, and ABI.
Critical: Understanding Token Decimals in PrecompilesAll Cosmos EVM precompile contracts use the native chain’s decimal precision, not Ethereum’s standard 18 decimals (wei).Why this matters:
  • Cosmos chains typically use 6 decimals, while Ethereum uses 18
  • Passing values while assuming conventional Ethereum exponents could cause significant miscalculations
  • Example: On a 6-decimal chain, passing 1000000000000000000 (1 token in wei) will be interpreted as 1 trillion tokens
Before using any precompile:
  1. Check your chain’s native token decimal precision
  2. Convert amounts to match the native token’s format
  3. Never assume 18-decimal precision
// WRONG: Assuming Ethereum's 18 decimals
uint256 amount = 1 ether; // 1000000000000000000
staking.delegate(validator, amount); // Delegates 1 trillion tokens!

// CORRECT: Using chain's native 6 decimals
uint256 amount = 1000000; // 1 token with 6 decimals
staking.delegate(validator, amount); // Delegates 1 token

​
Genesis Configuration

Precompiles must be enabled in the genesis file to be available on the network. The active_static_precompiles parameter controls which precompiles are activated at network launch. 
{
  "app_state": {
    "evm": {
      "params": {
        "active_static_precompiles": [
          "0x0000000000000000000000000000000000000100",  // P256
          "0x0000000000000000000000000000000000000400",  // Bech32
          "0x0000000000000000000000000000000000000800",  // Staking
          "0x0000000000000000000000000000000000000801",  // Distribution
          "0x0000000000000000000000000000000000000802",  // ICS20
          "0x0000000000000000000000000000000000000804",  // Bank
          "0x0000000000000000000000000000000000000805",  // Governance
          "0x0000000000000000000000000000000000000806",  // Slashing
          "0x0000000000000000000000000000000000000807"   // Callbacks
        ]
      }
    }
  }
}
For complete genesis configuration including EVM and fee market parameters, see the Node Configuration reference.

​
v0.5.0 Breaking Changes

Precompile Constructor Interface ChangesAll precompile constructors in v0.5.0 now require keeper interfaces instead of concrete keeper implementations. This improves decoupling and testability but requires updates to custom precompile implementations.

​
Interface Requirements

Before (v0.4.x): 
// Concrete keeper types required
bankPrecompile, err := bankprecompile.NewPrecompile(
    bankKeeper,      // bankkeeper.Keeper concrete type
    stakingKeeper,   // stakingkeeper.Keeper concrete type
    // ... other keepers
)
After (v0.5.0): 
// Keeper interfaces required (parameters accept interfaces directly)
bankPrecompile, err := bankprecompile.NewPrecompile(
    bankKeeper,    // common.BankKeeper interface
    erc20Keeper,   // erc20keeper.Keeper interface
)
Source: evmd/precompiles.go:122

​
Required Interfaces

The following keeper interfaces are defined in precompiles/common/interfaces.go:
  • BankKeeper: Account balances, token transfers, metadata
  • StakingKeeper: Validator operations, delegations, bond denom
  • DistributionKeeper: Reward withdrawals and distribution
  • SlashingKeeper: Validator slashing information
  • TransferKeeper: IBC transfer operations
  • ChannelKeeper: IBC channel and connection queries
  • ERC20Keeper: Token pair mappings and conversions

​
Migration Example

Custom Precompile Migration: 
// Before (v0.4.x)
func NewCustomPrecompile(
    bankKeeper bankkeeper.Keeper,
    stakingKeeper stakingkeeper.Keeper,
) (*CustomPrecompile, error) {
    return &CustomPrecompile{
        bankKeeper:    bankKeeper,
        stakingKeeper: stakingKeeper,
    }, nil
}

// After (v0.5.0)
func NewCustomPrecompile(
    bankKeeper common.BankKeeper,        // Interface instead of concrete type
    stakingKeeper common.StakingKeeper,  // Interface instead of concrete type
) (*CustomPrecompile, error) {
    return &CustomPrecompile{
        bankKeeper:    bankKeeper,
        stakingKeeper: stakingKeeper,
    }, nil
}
Assembly Updates: 
// In your precompile assembly function (based on evmd/precompiles.go)
func NewAvailableStaticPrecompiles(
    stakingKeeper stakingkeeper.Keeper,
    distributionKeeper distributionkeeper.Keeper,
    bankKeeper cmn.BankKeeper,              // Already interface type
    erc20Keeper erc20keeper.Keeper,
    // ... other keeper interfaces
    opts ...Option,
) map[common.Address]vm.PrecompiledContract {
    precompiles := make(map[common.Address]vm.PrecompiledContract)

    // No casting needed - parameters are already interface types
    bankPrecompile, err := bankprecompile.NewPrecompile(bankKeeper, erc20Keeper)
    if err != nil {
        panic(fmt.Errorf("failed to instantiate bank precompile: %w", err))
    }
    precompiles[bankPrecompile.Address()] = bankPrecompile
)
if err != nil {
    return nil, err
}
precompiles[bankAddress] = bankPrecompile

​
Integration Guide

​
Activation

Precompiles must be explicitly activated via the active_static_precompiles parameter: 
# Via genesis configuration
{
  "active_static_precompiles": [
    "0x0000000000000000000000000000000000000804", // Bank
    "0x0000000000000000000000000000000000000800"  // Staking
  ]
}

# Via governance proposal
evmd tx gov submit-proposal param-change-proposal.json --from validator

​
Usage in Smart Contracts

// Import precompile interfaces
import "./IBank.sol";
import "./IStaking.sol";

contract MyDApp {
    IBank constant bank = IBank(0x0000000000000000000000000000000000000804);
    IStaking constant staking = IStaking(0x0000000000000000000000000000000000000800);

    function getBalance(string memory denom) external view returns (uint256) {
        return bank.balances(msg.sender, denom);
    }

    function delegateTokens(string memory validatorAddr, uint256 amount) external {
        staking.delegate(msg.sender, validatorAddr, amount);
    }
}

​
Testing

All precompiles include comprehensive Solidity test suites for validation: 
# Run precompile tests
cd tests && npm test

# Test specific precompile
npx hardhat test test/Bank.test.js