Web3.Contract.Call

Type-safe contract read calls (eth_call).

Build a read call, encode it for the JS port, decode the response. The code generator creates typed wrappers around these primitives.

-- Generated code uses this under the hood:
balanceOf : Address -> ReadCall String
balanceOf addr =
    readCall
        { contract = tokenAddress
        , method = "balanceOf"
        , args = [ Encode.address addr ]
        , decoder = Decode.string
        }

type ReadCall a

A read-only contract call with a typed return value.

readCall :

{ contract : Address

, method : String

, args : List Value

, decoder : Decoder a

, id : String

}

-> ReadCall a

Create a read call. The id is echoed back in the response so you can match responses to requests when multiple calls are in flight.

withBlock : BlockNumber -> ReadCall a -> ReadCall a