當我用 delegatecall 呼叫 ownerof 時，地址重新呼叫錯誤

我想呼叫函式“ownerof”契約，但它返回我類似的東西：0x00000000000000000000000000000000000000000000000000000000000000200000000000000000000000000000000000000000000000000000000000000020000000000000000000000000bc641d0c1acc8f85bb53aceade03bbc58de693d1

功能是：

   function updateRaceLeaderboard(
   uint256 raceID,
   uint256[] memory _leaderboard
) public onlyOwner returns (bytes memory addr) {
   RaceleaderBoard[raceID] = _leaderboard;
  
   address contractAddress = 0x80AFf21544b6670fCfD813134C83Bb340307c453;
   (bool success, bytes memory returndata) = contractAddress.call(
       abi.encodeWithSignature("ownerOf(uint256)", 0)
   );
   return returndata;
}

我這樣稱呼它：

   dev = accounts.add(config["wallets"]["from_key"])
print("Working on " + network.show_active())
trx = race.updateRaceLeaderboard(
   0,
   [0],
   {"from": dev},
)

ownerOf(uint256) 函式位於不同的合約中：

https://mumbai.polygonscan.com/address/0x80AFf21544b6670fCfD813134C83Bb340307c453#readContract

成功 bool 返回 True

你知道我怎樣才能收到正確的地址嗎？

您需要使用解碼返回數據abi.decode(returndata, (address))

在您說它沒有成功的評論中，它不是返回地址而是錯誤消息

該錯誤可以解釋為

0x
0000000000000000000000000000000000000000000000000000000000000020
0000000000000000000000000000000000000000000000000000000000000084
08c379a0
0000000000000000000000000000000000000000000000000000000000000020
0000000000000000000000000000000000000000000000000000000000000029
4552433732313a206f776e657220717565...

這08c379a0是一個錯誤簽名Error(string)

解碼4552433732313a206f776e657220717565它給出的字元串messgae

ERC721: owner que

我的猜測是對應於

function ownerOf(uint256 tokenId) public view virtual override returns (address) {
   return _tokenOwners.get(tokenId, "ERC721: owner query for nonexistent token");
}

我的第二個猜測是您不應該使用委託呼叫，而是呼叫或靜態呼叫。

---

範例如何解析返回的數據

(bool success, bytes memory returndata) = contractAddress.call(
   abi.encodeWithSignature("ownerOf(uint256)", 0)
);


if (success) {
   (address owner) = abi.decode(returndata, (address));
   return owner;
}

引用自：https://ethereum.stackexchange.com/questions/124907