The available commands for execution are listed below. The primary workflow commands are given first, followed by less common or more advanced commands.
Main commands: init Prepare your working directory for other commands validate Check whether the configuration is valid plan Show changes required by the current configuration apply Create or update infrastructure destroy Destroy previously-created infrastructure
All other commands: console Try Terraform expressions at an interactive command prompt fmt Reformat your configuration in the standard style force-unlock Release a stuck lock on the current workspace get Install or upgrade remote Terraform modules graph Generate a Graphviz graph of the steps in an operation import Associate existing infrastructure with a Terraform resource login Obtain and save credentials for a remote host logout Remove locally-stored credentials for a remote host metadata Metadata related commands output Show output values from your root module providers Show the providers required for this configuration refresh Update the state to match remote systems show Show the current state or a saved plan state Advanced state management taint Mark a resource instance as not fully functional test Experimental support for module integration testing untaint Remove the 'tainted' state from a resource instance version Show the current Terraform version workspace Workspace management
Global options (use these before the subcommand, if any): -chdir=DIR Switch to a different working directory before executing the given subcommand. -help Show this help output, or the help for a specified subcommand. -version An alias for the "version" subcommand. ➜ 02-overview git:(main) terraform init
Terraform has created a lock file .terraform.lock.hcl to record the provider selections it made above. Include this file in your version control repository so that Terraform can guarantee to make the same selections by default when you run "terraform init" in the future.
Terraform has been successfully initialized!
You may now begin working with Terraform. Try running "terraform plan" to see any changes that are required for your infrastructure. All Terraform commands should now work.
If you ever set or change modules or backend configuration for Terraform, rerun this command to reinitialize your working directory. If you forget, other commands will detect it and remind you to do so if necessary.
interface IMulticall { /// @notice Takes an array of abi-encoded call data, delegatecalls itself with each calldata, and returns the abi-encoded result /// @dev Reverts if any delegatecall reverts /// @param data The abi-encoded data /// @returns results The abi-encoded return values function multicall(bytes[] calldata data) external virtual returns (bytes[] memory results);
/// @notice OPTIONAL. Takes an array of abi-encoded call data, delegatecalls itself with each calldata, and returns the abi-encoded result /// @dev Reverts if any delegatecall reverts /// @param data The abi-encoded data /// @param values The effective msg.values. These must add up to at most msg.value /// @returns results The abi-encoded return values function multicallPayable(bytes[] calldata data, uint256[] values) external payable virtual returns (bytes[] memory results); }
multicallPayable 是可选的，因为由于 msg.value，它并不总是可行的。
以下是最为简陋的实现方式。
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pragma solidity ^0.8.0;
/// Derived from OpenZeppelin's implementation abstract contract Multicall is IMulticall { function multicall(bytes[] calldata data) external virtual returns (bytes[] memory results) { results = new bytes[](data.length); for (uint256 i = 0; i < data.length; i++) { (bool success, bytes memory returndata) = address(this).delegatecall(data); require(success); results[i] = returndata; } return results; } }
