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ethers-io / ethers.js

Complete Ethereum library and wallet implementation in JavaScript.
https://ethers.org/
MIT License
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Getting `Unexpected end of JSON input` #2453

Closed kadiemq closed 1 year ago

kadiemq commented 2 years ago 
const ethers = require('ethers');

const addresses = {
WBNB: '0xbb4CdB9CBd36B01bD1cBaEBF2De08d9173bc095c',
BUSD: '0xe9e7cea3dedca5984780bafc599bd69add087d56',
factory: '0xcA143Ce32Fe78f1f7019d7d551a6402fC5350c73',
router: '0x10ed43c718714eb63d5aa57b78b54704e256024e',
recipient: ''
}

const privateKey = '';

const mygasPrice = ethers.utils.parseUnits('5', 'gwei');

const provider = new ethers.providers.WebSocketProvider('wss://apis-sj.ankr.com/.............');
const wallet = new ethers.Wallet(privateKey);
const account = wallet.connect(provider);

const factory = new ethers.Contract(
addresses.factory,
['event PairCreated(address indexed token0, address indexed token1, address pair, uint)'],
account
);
const router = new ethers.Contract(
addresses.router,
[
'function getAmountsOut(uint amountIn, address[] memory path) public view returns (uint[] memory amounts)',
'function swapExactTokensForTokens(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline) external returns (uint[] memory amounts)'
],
account
);

const wbnb = new ethers.Contract(
addresses.WBNB,
[
'function approve(address spender, uint amount) public returns(bool)',
],
account
);

console.log('Before Approve');
const valueToapprove = ethers.utils.parseUnits('0.01', 18);
const init = async () => {
const tx = await wbnb.approve(
router.address,
valueToapprove,
{
gasPrice: mygasPrice,
gasLimit: '162445'
}
);
console.log('After Approve');
const receipt = await tx.wait();
console.log('Transaction receipt');
console.log(receipt);
}

factory.on('PairCreated', async (token0, token1, pairAddress) => {
console.log('after factory.on:');
console.log(' New pair detected ================= token0: ${token0} token1: ${token1} pairAddress: ${pairAddress} ');

//The quote currency needs to be WBNB (we will pay with WBNB)
let tokenIn, tokenOut;
if(token0 === addresses.WBNB) {
tokenIn = token0;
tokenOut = token1;
}

if(token1 == addresses.WBNB) {
tokenIn = token1;
tokenOut = token0;
}

//The quote currency is not WBNB
if(typeof tokenIn === 'undefined') {
return;
}

//We buy for 0.1 BNB of the new token
//ethers was originally created for Ethereum, both also work for BSC
//'ether' === 'bnb' on BSC
console.log('line 87');
const amountIn = ethers.utils.parseUnits('0.01', 'ether');
const amounts = await router.getAmountsOut(amountIn, [tokenIn, tokenOut]);
//Our execution price will be a bit different, we need some flexbility
const amountOutMin = amounts[1].sub(amounts[1].div(10));

console.log('line 92');
console.log(' Buying new token ================= tokenIn: ${amountIn} ${tokenIn} (WBNB) tokenOut: ${amountOutMin} ${tokenOut} ');
console.log('line 101');

const tx = await router.swapExactTokensForTokens(
amountIn,
amountOutMin,
[tokenIn, tokenOut],
addresses.recipient,
Math.floor(Date.now() / 1000) + 60 * 20, // 20 minutes from the current Unix time
{
gasPrice: mygasPrice,
gasLimit: 162445
}
);
console.log('line 117');
const receipt = await tx.wait();
console.log('Transaction receipt');
console.log('receipt');
});

init();

I'm getting this error:

Before Approve
After Approve
undefined:1

SyntaxError: Unexpected end of JSON input
    at JSON.parse (<anonymous>)
    at WebSocketProvider._this._websocket.onmessage (C:\Users\Kadiem Alqazzaz\Desktop\psbot\node_modules\@ethersproject\providers\lib\websocket-provider.js:106:31)
    at WebSocket.onMessage (C:\Users\Kadiem Alqazzaz\Desktop\psbot\node_modules\ws\lib\event-target.js:132:16)
    at WebSocket.emit (events.js:375:28)
    at Receiver.receiverOnMessage (C:\Users\Kadiem Alqazzaz\Desktop\psbot\node_modules\ws\lib\websocket.js:834:20)
    at Receiver.emit (events.js:375:28)
    at Receiver.dataMessage (C:\Users\Kadiem Alqazzaz\Desktop\psbot\node_modules\ws\lib\receiver.js:437:14)
    at Receiver.getData (C:\Users\Kadiem Alqazzaz\Desktop\psbot\node_modules\ws\lib\receiver.js:367:17)
    at Receiver.startLoop (C:\Users\Kadiem Alqazzaz\Desktop\psbot\node_modules\ws\lib\receiver.js:143:22)
    at Receiver._write (C:\Users\Kadiem Alqazzaz\Desktop\psbot\node_modules\ws\lib\receiver.js:78:10)
ricmoo commented 2 years ago

Can you add provider.on("debug", console.log)? It looks like the backend is not returning a valid response?

kadiemq commented 2 years ago

Can you add provider.on("debug", console.log)? It looks like the backend is not returning a valid response?

I get this log:

Before Approve
{
  action: 'request',
  request: {
    method: 'eth_subscribe',
    params: [ 'logs', [Object] ],
    id: 1,
    jsonrpc: '2.0'
  },
  provider: WebSocketProvider {
    _isProvider: true,
    _events: [ [Event], [Event] ],
    _emitted: { block: -2 },
    formatter: Formatter { formats: [Object] },
    anyNetwork: false,
    _networkPromise: Promise { <pending> },
    _maxInternalBlockNumber: -1024,
    _lastBlockNumber: -2,
    _pollingInterval: -1,
    _fastQueryDate: 0,
    connection: {
      url: 'wss://apis-sj.ankr.com/......'
    },
    _nextId: 42,
    _wsReady: false,
    _websocket: WebSocket {
      _events: [Object: null prototype],
      _eventsCount: 2,
      _maxListeners: undefined,
      _binaryType: 'nodebuffer',
      _closeCode: 1006,
      _closeFrameReceived: false,
      _closeFrameSent: false,
      _closeMessage: '',
      _closeTimer: null,
      _extensions: {},
      _protocol: '',
      _readyState: 0,
      _receiver: null,
      _sender: null,
      _socket: null,
      _bufferedAmount: 0,
      _isServer: false,
      _redirects: 0,
      _url: 'wss://apis-sj.ankr.com/......',
      _req: [ClientRequest],
      [Symbol(kCapture)]: false
    },
    _requests: { '1': [Object], '2': [Object] },
    _subs: {},
    _subIds: {
      'filter:0xcA143Ce32Fe78f1f7019d7d551a6402fC5350c73:0x0d3648bd0f6ba80134a33ba9275ac585d9d315f0ad8355cddefde31afa28d0e9': [Promise]
    },
    _eventLoopCache: { detectNetwork: null },
    _detectNetwork: Promise { <pending> }
  }
}
{
  action: 'request',
  request: { method: 'eth_chainId', params: [], id: 2, jsonrpc: '2.0' },
  provider: WebSocketProvider {
    _isProvider: true,
    _events: [ [Event], [Event] ],
    _emitted: { block: -2 },
    formatter: Formatter { formats: [Object] },
    anyNetwork: false,
    _networkPromise: Promise { <pending> },
    _maxInternalBlockNumber: -1024,
    _lastBlockNumber: -2,
    _pollingInterval: -1,
    _fastQueryDate: 0,
    connection: {
      url: 'wss://apis-sj.ankr.com/......'
    },
    _nextId: 42,
    _wsReady: false,
    _websocket: WebSocket {
      _events: [Object: null prototype],
      _eventsCount: 2,
      _maxListeners: undefined,
      _binaryType: 'nodebuffer',
      _closeCode: 1006,
      _closeFrameReceived: false,
      _closeFrameSent: false,
      _closeMessage: '',
      _closeTimer: null,
      _extensions: {},
      _protocol: '',
      _readyState: 0,
      _receiver: null,
      _sender: null,
      _socket: null,
      _bufferedAmount: 0,
      _isServer: false,
      _redirects: 0,
      _url: 'wss://apis-sj.ankr.com/......',
      _req: [ClientRequest],
      [Symbol(kCapture)]: false
    },
    _requests: { '1': [Object], '2': [Object] },
    _subs: {},
    _subIds: {
      'filter:0xcA143Ce32Fe78f1f7019d7d551a6402fC5350c73:0x0d3648bd0f6ba80134a33ba9275ac585d9d315f0ad8355cddefde31afa28d0e9': [Promise]
    },
    _eventLoopCache: { detectNetwork: null },
    _detectNetwork: Promise { <pending> }
  }
}
{
  action: 'response',
  request: {
    method: 'eth_subscribe',
    params: [ 'logs', [Object] ],
    id: 1,
    jsonrpc: '2.0'
  },
  response: '0x408ebf6d27b4764250ac8dbc176f8be6',
  provider: WebSocketProvider {
    _isProvider: true,
    _events: [ [Event], [Event] ],
    _emitted: { block: -2 },
    formatter: Formatter { formats: [Object] },
    anyNetwork: false,
    _networkPromise: Promise { <pending> },
    _maxInternalBlockNumber: -1024,
    _lastBlockNumber: -2,
    _pollingInterval: -1,
    _fastQueryDate: 0,
    connection: {
      url: 'wss://apis-sj.ankr.com/......'
    },
    _nextId: 42,
    _wsReady: true,
    _websocket: WebSocket {
      _events: [Object: null prototype],
      _eventsCount: 2,
      _maxListeners: undefined,
      _binaryType: 'nodebuffer',
      _closeCode: 1006,
      _closeFrameReceived: false,
      _closeFrameSent: false,
      _closeMessage: '',
      _closeTimer: null,
      _extensions: {},
      _protocol: '',
      _readyState: 1,
      _receiver: [Receiver],
      _sender: [Sender],
      _socket: [TLSSocket],
      _bufferedAmount: 0,
      _isServer: false,
      _redirects: 0,
      _url: 'wss://apis-sj.ankr.com/......',
      _req: null,
      [Symbol(kCapture)]: false
    },
    _requests: { '2': [Object] },
    _subs: { '0x408ebf6d27b4764250ac8dbc176f8be6': [Object] },
    _subIds: {
      'filter:0xcA143Ce32Fe78f1f7019d7d551a6402fC5350c73:0x0d3648bd0f6ba80134a33ba9275ac585d9d315f0ad8355cddefde31afa28d0e9': [Promise]
    },
    _eventLoopCache: { detectNetwork: null },
    _detectNetwork: Promise { <pending> }
  }
}
{
  action: 'response',
  request: { method: 'eth_chainId', params: [], id: 2, jsonrpc: '2.0' },
  response: '0x38',
  provider: WebSocketProvider {
    _isProvider: true,
    _events: [ [Event], [Event] ],
    _emitted: { block: -2 },
    formatter: Formatter { formats: [Object] },
    anyNetwork: false,
    _networkPromise: Promise { [Object] },
    _maxInternalBlockNumber: -1024,
    _lastBlockNumber: -2,
    _pollingInterval: -1,
    _fastQueryDate: 0,
    connection: {
      url: 'wss://apis-sj.ankr.com/......'
    },
    _nextId: 42,
    _wsReady: true,
    _websocket: WebSocket {
      _events: [Object: null prototype],
      _eventsCount: 2,
      _maxListeners: undefined,
      _binaryType: 'nodebuffer',
      _closeCode: 1006,
      _closeFrameReceived: false,
      _closeFrameSent: false,
      _closeMessage: '',
      _closeTimer: null,
      _extensions: {},
      _protocol: '',
      _readyState: 1,
      _receiver: [Receiver],
      _sender: [Sender],
      _socket: [TLSSocket],
      _bufferedAmount: 0,
      _isServer: false,
      _redirects: 0,
      _url: 'wss://apis-sj.ankr.com/......',
      _req: null,
      [Symbol(kCapture)]: false
    },
    _requests: { '3': [Object], '4': [Object] },
    _subs: { '0x408ebf6d27b4764250ac8dbc176f8be6': [Object] },
    _subIds: {
      'filter:0xcA143Ce32Fe78f1f7019d7d551a6402fC5350c73:0x0d3648bd0f6ba80134a33ba9275ac585d9d315f0ad8355cddefde31afa28d0e9': [Promise]
    },
    _eventLoopCache: { detectNetwork: null },
    _detectNetwork: Promise { [Object] },
    _network: {
      name: 'bnb',
      chainId: 56,
      ensAddress: null,
      _defaultProvider: null
    }
  }
}
{
  action: 'request',
  request: { method: 'eth_gasPrice', params: [], id: 3, jsonrpc: '2.0' },
  provider: WebSocketProvider {
    _isProvider: true,
    _events: [ [Event], [Event] ],
    _emitted: { block: -2 },
    formatter: Formatter { formats: [Object] },
    anyNetwork: false,
    _networkPromise: Promise { [Object] },
    _maxInternalBlockNumber: -1024,
    _lastBlockNumber: -2,
    _pollingInterval: -1,
    _fastQueryDate: 0,
    connection: {
      url: 'wss://apis-sj.ankr.com/......'
    },
    _nextId: 42,
    _wsReady: true,
    _websocket: WebSocket {
      _events: [Object: null prototype],
      _eventsCount: 2,
      _maxListeners: undefined,
      _binaryType: 'nodebuffer',
      _closeCode: 1006,
      _closeFrameReceived: false,
      _closeFrameSent: false,
      _closeMessage: '',
      _closeTimer: null,
      _extensions: {},
      _protocol: '',
      _readyState: 1,
      _receiver: [Receiver],
      _sender: [Sender],
      _socket: [TLSSocket],
      _bufferedAmount: 0,
      _isServer: false,
      _redirects: 0,
      _url: 'wss://apis-sj.ankr.com/......',
      _req: null,
      [Symbol(kCapture)]: false
    },
    _requests: { '3': [Object], '4': [Object] },
    _subs: { '0x408ebf6d27b4764250ac8dbc176f8be6': [Object] },
    _subIds: {
      'filter:0xcA143Ce32Fe78f1f7019d7d551a6402fC5350c73:0x0d3648bd0f6ba80134a33ba9275ac585d9d315f0ad8355cddefde31afa28d0e9': [Promise]
    },
    _eventLoopCache: { detectNetwork: null },
    _detectNetwork: Promise { [Object] },
    _network: {
      name: 'bnb',
      chainId: 56,
      ensAddress: null,
      _defaultProvider: null
    }
  }
}
{
  action: 'request',
  request: {
    method: 'eth_getBlockByNumber',
    params: [ 'latest', false ],
    id: 4,
    jsonrpc: '2.0'
  },
  provider: WebSocketProvider {
    _isProvider: true,
    _events: [ [Event], [Event] ],
    _emitted: { block: -2 },
    formatter: Formatter { formats: [Object] },
    anyNetwork: false,
    _networkPromise: Promise { [Object] },
    _maxInternalBlockNumber: -1024,
    _lastBlockNumber: -2,
    _pollingInterval: -1,
    _fastQueryDate: 0,
    connection: {
      url: 'wss://apis-sj.ankr.com/......'
    },
    _nextId: 42,
    _wsReady: true,
    _websocket: WebSocket {
      _events: [Object: null prototype],
      _eventsCount: 2,
      _maxListeners: undefined,
      _binaryType: 'nodebuffer',
      _closeCode: 1006,
      _closeFrameReceived: false,
      _closeFrameSent: false,
      _closeMessage: '',
      _closeTimer: null,
      _extensions: {},
      _protocol: '',
      _readyState: 1,
      _receiver: [Receiver],
      _sender: [Sender],
      _socket: [TLSSocket],
      _bufferedAmount: 0,
      _isServer: false,
      _redirects: 0,
      _url: 'wss://apis-sj.ankr.com/......',
      _req: null,
      [Symbol(kCapture)]: false
    },
    _requests: { '3': [Object], '4': [Object] },
    _subs: { '0x408ebf6d27b4764250ac8dbc176f8be6': [Object] },
    _subIds: {
      'filter:0xcA143Ce32Fe78f1f7019d7d551a6402fC5350c73:0x0d3648bd0f6ba80134a33ba9275ac585d9d315f0ad8355cddefde31afa28d0e9': [Promise]
    },
    _eventLoopCache: { detectNetwork: null },
    _detectNetwork: Promise { [Object] },
    _network: {
      name: 'bnb',
      chainId: 56,
      ensAddress: null,
      _defaultProvider: null
    }
  }
}
{
  action: 'response',
  request: { method: 'eth_gasPrice', params: [], id: 3, jsonrpc: '2.0' },
  response: '0x12a05f200',
  provider: WebSocketProvider {
    _isProvider: true,
    _events: [ [Event], [Event] ],
    _emitted: { block: -2 },
    formatter: Formatter { formats: [Object] },
    anyNetwork: false,
    _networkPromise: Promise { [Object] },
    _maxInternalBlockNumber: -1024,
    _lastBlockNumber: -2,
    _pollingInterval: -1,
    _fastQueryDate: 0,
    connection: {
      url: 'wss://apis-sj.ankr.com/......'
    },
    _nextId: 42,
    _wsReady: true,
    _websocket: WebSocket {
      _events: [Object: null prototype],
      _eventsCount: 2,
      _maxListeners: undefined,
      _binaryType: 'nodebuffer',
      _closeCode: 1006,
      _closeFrameReceived: false,
      _closeFrameSent: false,
      _closeMessage: '',
      _closeTimer: null,
      _extensions: {},
      _protocol: '',
      _readyState: 1,
      _receiver: [Receiver],
      _sender: [Sender],
      _socket: [TLSSocket],
      _bufferedAmount: 0,
      _isServer: false,
      _redirects: 0,
      _url: 'wss://apis-sj.ankr.com/......',
      _req: null,
      [Symbol(kCapture)]: false
    },
    _requests: { '4': [Object] },
    _subs: { '0x408ebf6d27b4764250ac8dbc176f8be6': [Object] },
    _subIds: {
      'filter:0xcA143Ce32Fe78f1f7019d7d551a6402fC5350c73:0x0d3648bd0f6ba80134a33ba9275ac585d9d315f0ad8355cddefde31afa28d0e9': [Promise]
    },
    _eventLoopCache: { detectNetwork: null },
    _detectNetwork: Promise { [Object] },
    _network: {
      name: 'bnb',
      chainId: 56,
      ensAddress: null,
      _defaultProvider: null
    }
  }
}
{
  action: 'response',
  request: {
    method: 'eth_getBlockByNumber',
    params: [ 'latest', false ],
    id: 4,
    jsonrpc: '2.0'
  },
  response: {
    extraData: '0xd883010105846765746888676f312e31362e37856c696e7578000000c3167bdf9e31bdead72aefb316bfa08205732b38232d5541ce3704ce6bd8e9aeec1f787151982f9d4dd3f1cba0eef1ccc1ecbb340f99b70d4d47214b9fd10012ec2bded301',
    gasLimit: '0x4c24cbd',
    gasUsed: '0x1d6ee9e',
    hash: '0x61d1166094ed6600c8f0d618622cbe1656edc123df72d8500aa3e9d807022c18',
    logsBloom: '0x1e2ada546e7ddd3a327e9c11c7fd7c79633a465ebe11531f4f95b7f8d2645d70fba7bcbacebe5fb377ec77bcd59e7bee6bffa6aa07dfc2775fdffa66392879b757769dbabb77be7a7fdf432dd67dab6ef9d703ba3fc35eafe3af2b7ddfddfadcdae9d635163ef89bb6cf37b91c00eb5fea5ff9fbfefcb6ffc53a7932f4dd3b
cdb322fc77eb548f4409d1ef0e5dd6a32e927615ddf31f9fb9bbb33dffda2cd8fbabbef4ead167e2f152fa64b86a37a792ce3df2327cc8ff8caeaab9ed95c7c6f6e77dd7f7a06aadc653967bd4ee2ef636bf5cdedbedff3fd9a505a6cbd9efe3de7d7c3f4f333dc4f7ab29f7196e6db88564dffdda7cfafe75b6bfbfe4fffdbf33',
    parentHash: '0x9c6eff150edb03ec50a877256744b86458ab0da14dcdcc74b556a5a0a4c336d3',
    size: '0x13ab4',
    stateRoot: '0xe3536427c57b973af07c14d4f71b305f7ac6028dde442e1cc238248e7b2757df',
    totalDifficulty: '0x1a347d5',
    transactions: [
      '0xc8c6b1263604245e841978bb54f0f6797b3f3e132247473311a8c301a6e0de91',
      '0x9a45d2eeebb4346882c98335c81472428986c6d6ada9ddda46dfacb2d5051621',
      '0xdf3a94854f7832093b6d55f5d84109391586251a055e66eadedeae5d738393ab',
      '0x8799ff441048806659289e3d2581cb293d404dc9d43ff4c8a398c8a79e56619d',
      '0x33480fcf462b310996fa9cd9c14a91c96c783863ba3c798fda14a7fc876dbf27',
      '0x6c62a5602a20b95f256f9568dd62ade119bed6f67ce93c2632b42ea175a0eacf',
      '0x289aef1198b710ff600cb603f83630c06668d520ac7da64e6f86563915d26aac',
      '0x3f663bb4a87ea1a78b37dc4df60a1f9175fe0cd2c9e02740f39a227aceb7e01a',
      '0x97c66d86bcb5cf581c0b0ca994fff3f539827efba33cd04763e12c426013ae37',
      '0x252c5a529718b46b36c364680e1b42447535656975ac19cadded5054e90a7704',
      '0xc5591f35457b68045182b54c598192011773746c6bd0f2e38921994f53557bc5',
      '0xb9943c82d4ff67c6630ecd8092a38c36f3560f29621f40fc63e0870b676fc81f',
      '0x5a4de4562756f9306d5c114f3286a76f3e3650f972d9992fb376ee25c9f938ed',
      '0xcf7dff8a9e5e8f905f9e5a6b3b38dd9ca000c38825aee3cb18b3ef25955df91e',
      '0x5f4ccd021606340f6c74019d8fe21ea913cf95acd80e157503f03c1179c5d939',
      '0xcb0130948f65ae24ec1e6a18db07581bc5eb58d93b6cdabbd84360aecd600ba3',
      '0xa1c0d85352bffa0c9d57b4a940cee955758cc67d76794ef69b726c8e26120899',
      '0x7113fae96e512244fb53b1e1ecf3e73cd28b2021c2ac1f2bfde7dcf5fb5b989e',
      '0xb46eef3d634c120de694bccee2b6a28e2944f4921a1f40ef7722ca70ce6592e6',
      '0xfa01bc22cbab5c4bb0d4055782e5969b277df134cb7234b67d726e18470057ec',
      '0x00c05048233bab01108377f5533fcf8f8665ca3c838ac4243ecb7f8da8a06b3c',
      '0x9d2577daf895fd84034204a2f1f70995c0fb827665f219471c0d34a7cf668022',
      '0xd1cbfb1b6a146cbb816fbcbb119ee2d18d0b84dd52b5f48bd2e2a3548d56d483',
      '0x08ed22fc075a227dad54c7f3a8ee59b90589ad1127848033b68bc5fa10f0c143',
      '0x77309f0949dfbe841b493d6f0f57ae8134a0f58b87ae236b008c3470430ff73d',
      '0x96283e06be3f8cd93b020f0c5c34080195e5b708320a6a3c8421c1a9880509d4',
      '0xcbd7386514951bc09c1efa8490f4a6ec87be74ed21d45d5dcc2c22f0d0bb18c7',
      '0xc47bad744d6b5faddb00808bd93e5b4d9f3859dd056f22347304ad1261602e6b',
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After Approve
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    _isProvider: true,
    _events: [ [Event], [Event] ],
    _emitted: { block: -2 },
    formatter: Formatter { formats: [Object] },
    anyNetwork: false,
    _networkPromise: Promise { [Object] },
    _maxInternalBlockNumber: 13832930,
    _lastBlockNumber: -2,
    _pollingInterval: -1,
    _fastQueryDate: 1640584571648,
    connection: {
      url: 'wss://apis-sj.ankr.com/......'
    },
    _nextId: 42,
    _wsReady: true,
    _websocket: WebSocket {
      _events: [Object: null prototype],
      _eventsCount: 2,
      _maxListeners: undefined,
      _binaryType: 'nodebuffer',
      _closeCode: 1006,
      _closeFrameReceived: false,
      _closeFrameSent: false,
      _closeMessage: '',
      _closeTimer: null,
      _extensions: {},
      _protocol: '',
      _readyState: 1,
      _receiver: [Receiver],
      _sender: [Sender],
      _socket: [TLSSocket],
      _bufferedAmount: 0,
      _isServer: false,
      _redirects: 0,
      _url: 'wss://apis-sj.ankr.com/......',
      _req: null,
      [Symbol(kCapture)]: false
    },
    _requests: { '8': [Object] },
    _subs: { '0x408ebf6d27b4764250ac8dbc176f8be6': [Object] },
    _subIds: {
      'filter:0xcA143Ce32Fe78f1f7019d7d551a6402fC5350c73:0x0d3648bd0f6ba80134a33ba9275ac585d9d315f0ad8355cddefde31afa28d0e9': [Promise]
    },
    _eventLoopCache: { detectNetwork: null },
    _detectNetwork: Promise { [Object] },
    _network: {
      name: 'bnb',
      chainId: 56,
      ensAddress: null,
      _defaultProvider: null
    },
    _internalBlockNumber: Promise { [Object] },
    _fastBlockNumber: 13832930,
    _fastBlockNumberPromise: Promise { 13832930 }
  }
}
{
  action: 'request',
  request: {
    method: 'eth_getTransactionReceipt',
    params: [
      '0x402e75e5ff1591960de38e4aaceaf307c5208718507254d6dddf99863704f0f2'
    ],
    id: 8,
    jsonrpc: '2.0'
  },
  provider: WebSocketProvider {
    _isProvider: true,
    _events: [ [Event], [Event] ],
    _emitted: { block: -2 },
    formatter: Formatter { formats: [Object] },
    anyNetwork: false,
    _networkPromise: Promise { [Object] },
    _maxInternalBlockNumber: 13832930,
    _lastBlockNumber: -2,
    _pollingInterval: -1,
    _fastQueryDate: 1640584571648,
    connection: {
      url: 'wss://apis-sj.ankr.com/......'
    },
    _nextId: 42,
    _wsReady: true,
    _websocket: WebSocket {
      _events: [Object: null prototype],
      _eventsCount: 2,
      _maxListeners: undefined,
      _binaryType: 'nodebuffer',
      _closeCode: 1006,
      _closeFrameReceived: false,
      _closeFrameSent: false,
      _closeMessage: '',
      _closeTimer: null,
      _extensions: {},
      _protocol: '',
      _readyState: 1,
      _receiver: [Receiver],
      _sender: [Sender],
      _socket: [TLSSocket],
      _bufferedAmount: 0,
      _isServer: false,
      _redirects: 0,
      _url: 'wss://apis-sj.ankr.com/......',
      _req: null,
      [Symbol(kCapture)]: false
    },
    _requests: { '8': [Object] },
    _subs: { '0x408ebf6d27b4764250ac8dbc176f8be6': [Object] },
    _subIds: {
      'filter:0xcA143Ce32Fe78f1f7019d7d551a6402fC5350c73:0x0d3648bd0f6ba80134a33ba9275ac585d9d315f0ad8355cddefde31afa28d0e9': [Promise]
    },
    _eventLoopCache: { detectNetwork: null },
    _detectNetwork: Promise { [Object] },
    _network: {
      name: 'bnb',
      chainId: 56,
      ensAddress: null,
      _defaultProvider: null
    },
    _internalBlockNumber: Promise { [Object] },
    _fastBlockNumber: 13832930,
    _fastBlockNumberPromise: Promise { 13832930 }
  }
}
undefined:1

SyntaxError: Unexpected end of JSON input
    at JSON.parse (<anonymous>)
    at WebSocketProvider._this._websocket.onmessage (C:\Users\Kadiem Alqazzaz\Desktop\psbot\node_modules\@ethersproject\providers\lib\websocket-provider.js:106:31)
    at WebSocket.onMessage (C:\Users\Kadiem Alqazzaz\Desktop\psbot\node_modules\ws\lib\event-target.js:132:16)
    at WebSocket.emit (events.js:375:28)
    at Receiver.receiverOnMessage (C:\Users\Kadiem Alqazzaz\Desktop\psbot\node_modules\ws\lib\websocket.js:834:20)
    at Receiver.emit (events.js:375:28)
    at Receiver.dataMessage (C:\Users\Kadiem Alqazzaz\Desktop\psbot\node_modules\ws\lib\receiver.js:437:14)
    at Receiver.getData (C:\Users\Kadiem Alqazzaz\Desktop\psbot\node_modules\ws\lib\receiver.js:367:17)
    at Receiver.startLoop (C:\Users\Kadiem Alqazzaz\Desktop\psbot\node_modules\ws\lib\receiver.js:143:22)
    at Receiver._write (C:\Users\Kadiem Alqazzaz\Desktop\psbot\node_modules\ws\lib\receiver.js:78:10)
ScriptLike commented 2 years ago

I also get this error sometimes.


SyntaxError: Unexpected end of JSON input
    at JSON.parse (<anonymous>)
    at Socket.<anonymous> (C:\Users\Rad\Desktop\Forward\node_modules\@ethersproject\providers\lib\ipc-provider.js:59:34)
    at Socket.emit (node:events:402:35)
    at endReadableNT (node:internal/streams/readable:1343:12)
    at processTicksAndRejections (node:internal/process/task_queues:83:21)
ScriptLike commented 2 years ago

It looks like the backend is not returning a valid response?

Could you elaborate on what you mean by backend is not returning a valid response, I only sometimes have the error? Am I missing something when I am executing with my provider?

ghost commented 2 years ago

same issue with ankr web socket

Legend28469 commented 2 years ago

For anyone looking for a temporary fix, it looks like it's an Ankr problem from my testing. I haven't had that problem at all using Moralis

ricmoo commented 1 year ago

Closing this as it seems to have been an issue with the backend, not ethers. If not, please re-open or comment.

Thanks! :)