Decoding parameters with inline assembly in Solidity

Question

I Would like to know if there is a solidity equivalent to this web3:

web3.eth.abi.decodeParameter()

I'm currently looking at something like Seriality, but wondering if there was a supported native solidity implementation of the above. Including inline assembly.

My code looks something like: Web3 part:

var _data = await ABI.encode("120000000000000000000", user2, OCcontract1.address, "120000000000000000000", OCcontract2);
await swap(_data);

Solidity part:

Swap(_data){
     uint256 _amount;
     address _receiver;
     address _tokenLeadContract;
     uint256 _expectedAmount;
     address _expectedSC;

     (_amount, _receiver, _tokenLeadContract, _expectedAmount, _expectedSC) = decode(_data);

}

Answer 1

Yes, this is available in Solidity as abi.decode. You can see the documentation here https://solidity.readthedocs.io/en/v0.5.3/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions

For example, your code would look something like

 (_amount, _receiver, _tokenLeadContract, _expectedAmount, _expectedSC) = abi.decode(_data, (uint256, address, address, uint256, address));