predeploy-contracts v0.1.4

Predeploy-contracts

Generate bytecode for predeployment of ERC20 smart contracts in Acala.

Build

Run yarn to install dependencies.

Generate bytecode

To generate bytecode, run yarn run generate-bytecode.

The generated bytecode JSON file would be ./resources/bytecodes.json. The contracts are in ./contracts/tmp/ directory.

It can also be generated from the specified file, run yarn run generate-bytecode [tokens.json path] [bytecodes.json output path]

Development

The token list for ERC20 smart contracts is in ./resources/example_tokens.json. Name, symbol and Currency ID bytes are needed for each token, for instance:

{
  "name": "ACA",
  "symbol": "ACA",
  "currencyId": "0x0000"
}

Predeployed System Contracts

ERC20 Contracts

These ERC20 contracts make native and cross-chain tokens available inside Acala EVM.

• ACA contract address: 0x0000000000000000000000000000000001000000.
• AUSD contract address: 0x0000000000000000000000000000000001000001.
• DOT contract address: 0x0000000000000000000000000000000001000002.
• LDOT contract address: 0x0000000000000000000000000000000001000003.
• XBTC contract address: 0x0000000000000000000000000000000001000004.
• RENBTC contract address: 0x0000000000000000000000000000000001000005.
• POLKABTC contract address: 0x0000000000000000000000000000000001000006.
• PLM contract address: 0x0000000000000000000000000000000001000007.

• PHA contract address: 0x0000000000000000000000000000000001000008.

• KAR contract address: 0x0000000000000000000000000000000001000080.

• KUSD contract address: 0x0000000000000000000000000000000001000081.
• KSM contract address: 0x0000000000000000000000000000000001000082.
• LKSM contract address: 0x0000000000000000000000000000000001000083.
• SDN contract address: 0x0000000000000000000000000000000001000087.

// Returns the currencyId of the token.
function currencyId() public view returns (uint256);

// Returns the name of the token.
function name() public view returns (string memory);

// Returns the symbol of the token, usually a shorter version of the name.
function symbol() public view returns (string memory);

// Returns the number of decimals used to get its user representation.
function decimals() public view returns (uint8);

// Returns the amount of tokens in existence.
function totalSupply() public view returns (uint256);

// Returns the amount of tokens owned by `account`.
function balanceOf(address account) public view returns (uint256);

// Moves `amount` tokens from the caller's account to `recipient`.
// Returns a boolean value indicating whether the operation succeeded.
// Emits a {Transfer} event.
function transfer(address recipient, uint256 amount) public returns (bool);

// Returns the remaining number of tokens that `spender` will be allowed to spend on behalf of `owner` through {transferFrom}. 
// This is zero by default.
function allowance(address owner, address spender) public view returns (uint256);

// Sets `amount` as the allowance of `spender` over the caller's tokens.
// Returns a boolean value indicating whether the operation succeeded.
function approve(address spender, uint256 amount) public returns (bool);

// Moves `amount` tokens from `sender` to `recipient` using the allowance mechanism. `amount` is then deducted from the caller's allowance.
// Returns a boolean value indicating whether the operation succeeded.
function transferFrom(address sender, address recipient, uint256 amount) public returns (bool);

// Atomically increases the allowance granted to `spender` by the caller.
// This is an alternative to {approve} that can be used as a mitigation for problems described in {IERC20-approve}.
// Emits an {Approval} event indicating the updated allowance.
function increaseAllowance(address spender, uint256 addedValue) public returns (bool);

// Atomically decreases the allowance granted to `spender` by the caller.
// This is an alternative to {approve} that can be used as a mitigation for problems described in {IERC20-approve}.
// Emits an {Approval} event indicating the updated allowance.
function decreaseAllowance(address spender, uint256 subtractedValue) public returns (bool);

Other System Contracts:

These contracts make other chain-native functionalities available in Acala EVM.

State Rent

• StateRent contract address: 0x0000000000000000000000000000000000000800

// Returns the const of NewContractExtraBytes.
function newContractExtraBytes() public view returns (uint256);

// Returns the const of StorageDepositPerByte.
function storageDepositPerByte() public view returns (uint256);

// Returns the maintainer of the contract.
function maintainerOf(address contract_address) public view returns (address);

// Returns the const of DeveloperDeposit.
function developerDeposit() public view returns (uint256);

// Returns the const of DeploymentFee.
function deploymentFee() public view returns (uint256);

// Transfer the maintainer of the contract.
// Returns a boolean value indicating whether the operation succeeded.
function transferMaintainer(address contract_address, address new_maintainer) public returns (bool);

Oracle Price Feed

• Oracle contract address: 0x0000000000000000000000000000000000000801

// Get the price of the currency_id.
// Returns the (price, timestamp)
function getPrice(address token) public view returns (uint256, uint256);

On-chain Automatic Scheduler

• ScheduleCall contract address: 0x0000000000000000000000000000000000000802

// Schedule call the contract.
// Returns a boolean value indicating whether the operation succeeded.
function scheduleCall(address contract_address, uint256 value, uint256 gas_limit, uint256 storage_limit, uint256 min_delay, bytes memory input_data) public returns (bool);

// Cancel schedule call the contract.
// Returns a boolean value indicating whether the operation succeeded.
function cancelCall(bytes memory task_id) public returns (bool);

// Reschedule call the contract.
// Returns a boolean value indicating whether the operation succeeded.
function rescheduleCall(uint256 min_delay, bytes memory task_id) public returns (bool);

DEX

• DEX contract address: 0x0000000000000000000000000000000000000803

// Get liquidity of the currency_id_a and currency_id_b.
// Returns (liquidity_a, liquidity_b)
function getLiquidity(address tokenA, address tokenB) public view returns (uint256, uint256)

// Swap with exact supply.
// Returns (target_amount)
function swapWithExactSupply(address tokenA, address tokenB, uint256 supplyAmount, uint256 minTargetAmount) public view returns (uint256)

DeFi Contracts (Coming Soon)

These contracts will make Acala's DeFi primitives (stablecoin, staking derivative, and DeX) available in Acala EVM.