0x0000000000000000000000000000000000000400

The Bech32 precompile provides address format conversion between Ethereum hex addresses and Cosmos bech32 addresses. This enables smart contracts to interact with Cosmos SDK modules that require bech32-formatted addresses.

function hexToBech32(
    address addr,
    string memory prefix
) external returns (string memory bech32Address);

Converts an Ethereum hex address to bech32 format with the specified human-readable prefix (HRP).

Parameters:

• addr: The Ethereum address to convert
• prefix: The bech32 human-readable prefix (e.g., "cosmos", "evmos")

Returns:

• Bech32-formatted address string

Validation:

• Prefix must be non-empty and properly formatted
• Address must be a valid 20-byte Ethereum address
• Reverts if bech32 encoding fails

function bech32ToHex(
    string memory bech32Address
) external returns (address addr);

Converts a bech32-formatted address to Ethereum hex format.

Parameters:

• bech32Address: The bech32 address string to convert

Returns:

• Ethereum address in hex format

Validation:

• Input must be a valid bech32 address with proper formatting
• Address must contain the separator character "1"
• The decoded address must be 20 bytes
• Reverts if bech32 decoding fails

The precompile uses a configurable base gas amount for all operations. The gas cost is fixed regardless of string length within reasonable bounds.

Both methods perform validation on the address format:

• Hex addresses must be exactly 20 bytes
• Bech32 addresses must conform to the bech32 specification
• Invalid addresses result in execution reversion

For hexToBech32:

• The prefix parameter determines the human-readable part of the bech32 address
• Common prefixes include account addresses, validator addresses, and consensus addresses
• Empty or whitespace-only prefixes are rejected

For bech32ToHex:

• The prefix is automatically extracted from the bech32 address
• No prefix parameter is required as it's embedded in the address

Both methods are marked as nonpayable in the ABI but function as read-only operations. They do not modify blockchain state and could technically be seen as view functions.