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abi.map is not a function error

See original GitHub issue

Reopening https://github.com/ethers-io/ethers.js/issues/1196


 const interface = new ethers.utils.Interface(FILL_ORDER_ABI);  <----- this line raise the error.
    const sig = "fillOrder((address,address,address,address,uint256,uint256,uint256,uint256,uint256,uint256,bytes,bytes,bytes,bytes),uint256,bytes)";
 

    const data = interface.encodeFunctionData(sig, [orderTuple,fillAmount, signature])

The error;

TypeError: abi.map is not a function,

My abi ;

{"constant":false,"inputs":[
    {"components":[
        {"internalType":"address","name":"makerAddress","type":"address"},
        {"internalType":"address","name":"takerAddress","type":"address"},
        {"internalType":"address","name":"feeRecipientAddress","type":"address"},
        {"internalType":"address","name":"senderAddress","type":"address"},
        {"internalType":"uint256","name":"makerAssetAmount","type":"uint256"},
        {"internalType":"uint256","name":"takerAssetAmount","type":"uint256"},
        {"internalType":"uint256","name":"makerFee","type":"uint256"},
        {"internalType":"uint256","name":"takerFee","type":"uint256"},
        {"internalType":"uint256","name":"expirationTimeSeconds","type":"uint256"},
        {"internalType":"uint256","name":"salt","type":"uint256"},
        {"internalType":"bytes","name":"makerAssetData","type":"bytes"},
        {"internalType":"bytes","name":"takerAssetData","type":"bytes"},
        {"internalType":"bytes","name":"makerFeeAssetData","type":"bytes"},
        {"internalType":"bytes","name":"takerFeeAssetData","type":"bytes"}
        ],
        "internalType":"struct LibOrder.Order","name":"order","type":"tuple"
    },
        {"internalType":"uint256","name":"takerAssetFillAmount","type":"uint256"},
        {"internalType":"bytes","name":"signature","type":"bytes"}
    ],
    "name":"fillOrder",
    "outputs":[
        {"components":[
            {"internalType":"uint256","name":"makerAssetFilledAmount","type":"uint256"},
            {"internalType":"uint256","name":"takerAssetFilledAmount","type":"uint256"},
            {"internalType":"uint256","name":"makerFeePaid","type":"uint256"},
            {"internalType":"uint256","name":"takerFeePaid","type":"uint256"},
            {"internalType":"uint256","name":"protocolFeePaid","type":"uint256"}
            ],
        "internalType":"struct LibFillResults.FillResults",
        "name":"fillResults","type":"tuple"}
            ],
    "payable":true,
    "stateMutability":"payable",
    "type":"function"}