DCIPs/assets/eip-5058/factory/ERC5058Factory.sol

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// SPDX-License-Identifier: CC0-1.0
pragma solidity ^0.8.0;
import "./ERC721Bound.sol";
import "./IERC5058Factory.sol";
contract ERC5058Factory is IERC5058Factory {
address[] private _allBounds;
// Mapping from preimage to bound
mapping(address => address) private _bounds;
function allBoundsLength() public view virtual override returns (uint256) {
return _allBounds.length;
}
function boundByIndex(uint256 index) public view virtual override returns (address) {
require(index < _allBounds.length, "ERC5058Factory: index out of bounds");
return _allBounds[index];
}
function existBound(address preimage) public view virtual override returns (bool) {
return _bounds[preimage] != address(0);
}
function boundOf(address preimage) public view virtual override returns (address) {
require(existBound(preimage), "ERC5058Factory: query for nonexistent bound");
return _bounds[preimage];
}
function boundDeploy(address preimage) public virtual override returns (address) {
require(!existBound(preimage), "ERC5058Factory: bound nft is already deployed");
return _deploy(preimage, keccak256(abi.encode(preimage)), "Bound");
}
function _deploy(
address preimage,
bytes32 salt,
bytes memory prefix
) internal returns (address) {
IERC721Metadata collection = IERC721Metadata(preimage);
bytes memory code = type(ERC721Bound).creationCode;
bytes memory bytecode = abi.encodePacked(
code,
abi.encode(
preimage,
abi.encodePacked(prefix, " ", collection.name()),
abi.encodePacked(prefix, collection.symbol())
)
);
address addr;
assembly {
addr := create2(0, add(bytecode, 0x20), mload(bytecode), salt)
}
emit DeployedBound(preimage, addr);
_bounds[preimage] = addr;
_allBounds.push(addr);
return addr;
}
}