Precompiles
Documentation on the special precompiles that are available at the Humanode Network.
Use this precompile to check if the specified address has an active bioauth. Takes the validator public key (type
AccountId in the Humanode runtime code, also known as native - or Substrate - account).Property | Description |
|---|---|
Address | 0x0000000000000000000000000000000000000800 |
Input | AccountId (Substrate account address); 32 bytes
The public key to check. |
Output | bool; 1 byte
1 if bioauth is active for the address, 0 if bioauth is inactive for the address. |
You can use the helper library below together with your smart contract code to simplify invoking the precompile.
// SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.8.0;
library bioauth {
function isAuthenticated(bytes32 accountId) public view returns (bool result) {
address precompile = 0x0000000000000000000000000000000000000800;
bytes memory payload = abi.encodePacked(accountId);
(bool success, bytes memory returnData) = precompile.staticcall(payload);
assert(success);
assert(returnData.length == 1);
return (returnData[0] != 0);
}
}
Use this precompile to find a corresponding mapped native
AccountId for provided EVM address. This is useful to be used in combination with Bioauth precompile as you don't need to worry about a proper AccountId to do bioauth check.Description
Property | Description |
|---|---|
Address | 0x0000000000000000000000000000000000000801 |
Input | evmAddress (EVM address); 20 bytes |
Output | (bool, bytes32);
|
You can use the helper library below together with your smart contract code to simplify invoking the precompile.
// SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.8.0;
library evmAccounts {
function claimedNativeAccount(bytes20 evmAddress) public view returns (bool, bytes32) {
address precompile = 0x0000000000000000000000000000000000000801;
bytes memory payload = abi.encodePacked(evmAddress);
(bool success, bytes memory returnData) = precompile.staticcall(payload);
assert(success);
if (returnData.length == 0) {
return (false, 0x0);
}
bytes32 nativeAccount = abi.decode(returnData, (bytes32));
return (true, nativeAccount);
}
}
Last modified 4mo ago