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28function _safeTransferFrom(address from, OmnichainAddress to, uint256 tokenId, bytes memory) internal {
29    (uint32 chainId, ) = OmnichainAddresses.decode(to);
30    ChainidTools.requireNotCurrentChain(chainId);
31
32    // Setting an "auth" arguments enables the `_isAuthorized` check which verifies that the token exists
33    // (from != 0). Therefore, it is not needed to verify that the return value is not 0 here.
34    address previousOwner = _update(to, tokenId, _msgSender());
35    if (previousOwner != from) {
36        revert ERC721IncorrectOwner(from, tokenId, previousOwner);
37    }
38}
39
40function _update(OmnichainAddress to, uint256 tokenId, address auth) internal virtual returns (address) {
41    address from = _ownerOf(tokenId);
42
43    // Perform (optional) operator check
44    if (auth != address(0)) {
45        _checkAuthorized(from, auth, tokenId);
46    }
47
48    if (from != address(0)) {
49        // Clear approval. No need to re-authorize or emit the Approval event
50        _approve(address(0), tokenId, address(0), false);
51    }
52
53    _writeTransfer(from, to, tokenId);
54
55    (uint32 toChainId, ) = OmnichainAddresses.decode(to);
56    address toAddressPlaceholder = address(uint160(toChainId));
57
58    emit Transfer(from, toAddressPlaceholder, tokenId);
59
60    return from;
61}