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https://github.com/datahaven-xyz/datahaven
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82c581d495
## DataHaven Native Transfer Precompile Implements EVM precompile at address `0x00000000000000000000000000000007F5` (2073) to expose `pallet-datahaven-native-transfer` functionality to the EVM layer. ### Features - **Transfer to Ethereum**: Locks native tokens and sends them via Snowbridge to Ethereum addresses - **Pause/Unpause**: Admin controls to halt/resume transfers - **View Functions**: Query paused state, total locked balance, and sovereign account address ### Implementation - Precompile using `#[precompile_utils::precompile]` macro with proper gas accounting - 15+ test cases covering success/failure scenarios - Solidity interface with NatSpec documentation for contract integration Enables seamless cross-chain transfers of DataHaven native tokens to Ethereum L1. --------- Co-authored-by: Steve Degosserie <723552+stiiifff@users.noreply.github.com> Co-authored-by: Ahmad Kaouk <56095276+ahmadkaouk@users.noreply.github.com>
49 lines
2.4 KiB
Solidity
49 lines
2.4 KiB
Solidity
// SPDX-License-Identifier: GPL-3.0-only
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pragma solidity >=0.8.3;
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/// @dev The DataHavenNativeTransfer precompile address.
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address constant DATAHAVEN_NATIVE_TRANSFER_ADDRESS = 0x0000000000000000000000000000000000000819;
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/// @dev The DataHavenNativeTransfer precompile instance.
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DataHavenNativeTransfer constant DATAHAVEN_NATIVE_TRANSFER_CONTRACT =
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DataHavenNativeTransfer(DATAHAVEN_NATIVE_TRANSFER_ADDRESS);
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/// @author The DataHaven Team
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/// @title DataHaven Native Transfer Interface
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/// @notice Interface for transferring DataHaven native tokens to/from Ethereum via Snowbridge
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/// @custom:address 0x0000000000000000000000000000000000000819
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interface DataHavenNativeTransfer {
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/// @notice Emitted when tokens are locked for transfer to Ethereum
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/// @param account The account that locked tokens
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/// @param amount The amount of tokens locked
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event TokensLocked(address indexed account, uint256 amount);
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/// @notice Emitted when tokens are transferred to Ethereum
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/// @param from The account initiating the transfer
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/// @param to The Ethereum address receiving the tokens
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/// @param amount The amount of tokens transferred
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event TokensTransferredToEthereum(address indexed from, address indexed to, uint256 amount);
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/// @notice Transfer DataHaven native tokens to Ethereum
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/// @dev Locks tokens in the sovereign account and sends message through Snowbridge
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/// @param recipient Ethereum address to receive the tokens
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/// @param amount Amount of tokens to transfer (in smallest unit)
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/// @param fee Fee to incentivize relayers (in smallest unit)
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/// @custom:selector 0a3727e3
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function transferToEthereum(address recipient, uint256 amount, uint256 fee) external;
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/// @notice Check if the pallet is currently paused
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/// @return paused True if paused, false otherwise
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/// @custom:selector b187bd26
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function isPaused() external view returns (bool paused);
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/// @notice Get total amount of tokens locked in Ethereum sovereign account
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/// @return balance Total locked balance
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/// @custom:selector 05480e10
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function totalLockedBalance() external view returns (uint256 balance);
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/// @notice Get the Ethereum sovereign account address
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/// @return account The sovereign account address (as H160)
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/// @custom:selector 71f9ae03
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function ethereumSovereignAccount() external view returns (address account);
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}
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