Return nil on tx.call() (was not there few days ago)

when using let tokenBalance = try! tx.call() Xcode returns :

Thread 1: Fatal error: 'try!' expression unexpectedly raised an error: Swift.DecodingError.typeMismatch(Swift.Array<Any>, Swift.DecodingError.Context(codingPath: [], debugDescription: "Expected to decode Array<Any> but found a dictionary instead.", underlyingError: nil))

using ‘web3swift’, ‘~> 2.1.2’ I tried InfuraRopstenWeb3, InfuraRinkebyWeb3 I tried erc20 get balance and ETH get balance Do you get the same issue ? thank you

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update from @skywinder:

So I will be ready to assign this bounty for this fix

Requirements to succeed this bounty:

• add internal code-check for this error: that user uses public node and send explicit warning, about public node limitation and suggestion to use private node.
• add documentation instruction how to do this

[TheCodewr]

Hi All, So somehow, using same swift 2.2.1 looks like system is back on game again. Now I get the balance value using same code and ropsten, or rinkeby Note that I DID NOT do any change from the date of the disclaim Have a good one

[TheCodewr]

Guy’s, please make sure you are using your own endpoint. Chances are high you are using Maininfura() wich is a global pool limited by 10000 calls/ day Use your own end point URL + infura key and you will have your own cotas of 10000 calls / day (free), solving the error