Call Contract

POST localhost:9680/callContract

Parameters

contractAddress - string Contract address to interact with
functionName - string Smart contract function to interact with
abi - Array<AbiItem> (Optional) ABI of the contract to call
params - Array<string> (Optional) Params to call the smart contract function with
valueInWei - string (Optional) Amount of wei to send
gasLimit - string (Optional) Gas limit for the function call
chain - Object used to ensure the user is on the correct chain (follows the MetaMask specification)
- chainId - string Base 10 string matching the chain id on Chainlist
- chainMetadata (Optional) - Object used to add the chain if the user does not have the chain added to their wallet
  
  chainName - string
  
  nativeCurrency - Object
  
  name - string is the currency’s name
  
  symbol - string 2-6 characters long symbol for the chain
  
  decimals - 18
  
  rpcUrls - Array<string> is an array of rpc node urls that can be used to make requests. We recommend selecting a few from the listing on Chainlist
  
  blockExplorerUrls (Optional) - Array<string> is an array of block explorers that can be used with the chain
  
  iconUrls (Optional) - Array<string> is currently unused by MetaMask

Returns

Mixed - the return value(s) of the smart contract method. If it returns a single value, it’s returned as is. If it has multiple return values they are returned as an object with properties and indices:

Example

// MULTI-ARGUMENT RETURN:

// Solidity
contract MyContract {
    function myFunction() returns(uint256 myNumber, string myString) {
        return (23456, "Hello!%");
    }
}

// /callContract Result:
> Result {
    myNumber: '23456',
    myString: 'Hello!%',
    0: '23456', // these are here as fallbacks if the name is not know or given
    1: 'Hello!%'
}


// SINGLE-ARGUMENT RETURN:
// Solidity
contract MyContract {
    function myFunction() returns(string myString) {
        return "Hello!%";
    }
}

// /callContract Result:
> "Hello!%"