{
    "message": "The spender param is not a valid Ethereum address (0x followed by 40 hexidecimal characters).",
    "httpErrorCode": 404,
    "errorCode": -1,
    "stack": "Error: The spender param is not a valid Ethereum address (0x followed by 40 hexidecimal characters).\n    at throwIfErrorsExist (/Users/feng/Code/gateway/dist/src/services/validators.js:38:15)\n    at /Users/feng/Code/gateway/dist/src/services/validators.js:103:40\n    at EVMController.<anonymous> (/Users/feng/Code/gateway/dist/src/chains/ethereum/evm.controllers.js:155:65)\n    at Generator.next (<anonymous>)\n    at /Users/feng/Code/gateway/dist/src/chains/ethereum/evm.controllers.js:8:71\n    at new Promise (<anonymous>)\n    at __awaiter (/Users/feng/Code/gateway/dist/src/chains/ethereum/evm.controllers.js:4:12)\n    at EVMController.allowances (/Users/feng/Code/gateway/dist/src/chains/ethereum/evm.controllers.js:154:16)\n    at /Users/feng/Code/gateway/dist/src/chains/chain.controller.js:49:51\n    at Generator.next (<anonymous>)"
}