Bank - c8ntinuum Docs

Overview

The Bank precompile exposes native Cosmos SDK token supply and balance views. ERC-20-style transfers happen through registered ERC20 extension/token-pair addresses, not through the static Bank precompile. Precompile Address: 0x0000000000000000000000000000000000000804

Gas Costs

The Bank precompile has query methods only. Each method has a fixed gas cost:

Method	Gas Cost
`balances`	`2851`
`supplyOf`	`2477`
`totalSupply`	`2477`

Transfer behavior

The Bank precompile has no transfer method. For ERC-20-style transfers, see ERC20.

Query Methods

Method	Signature	Returns
`balances`	`balances(address account)`	`(tuple[](address contractAddress,uint256 amount) balances)`
`supplyOf`	`supplyOf(address erc20Address)`	`(uint256 totalSupply)`
`totalSupply`	`totalSupply()`	`(tuple[](address contractAddress,uint256 amount) totalSupply)`

Example

// Pseudocode: import the canonical IBank interface for the target release.
IBank constant bank = IBank(0x0000000000000000000000000000000000000804);

// Query native token-pair balances exposed through the bank precompile.
bank.balances(msg.sender);

Cosmos module precompiles take amounts in the base denom ctm, the smallest unit of CTM: 1 CTM = 10^18 ctm, the same scale as wei. Do not convert to 6 decimals as on other Cosmos chains; check each precompile’s expected amount format before interacting with it.

For the ABI catalog, see Precompile ABI Reference.