org.nervos.appchain.abi

Class FunctionReturnDecoder

java.lang.Object

org.nervos.appchain.abi.FunctionReturnDecoder

public class FunctionReturnDecoder
extends java.lang.Object

Decodes values returned by function or event calls.

Method Summary

Modifier and Type	Method and Description
static java.util.List<Type>	decode(java.lang.String rawInput, java.util.List<TypeReference<Type>> outputParameters) Decode ABI encoded return values from smart contract function call.
static <T extends Type> Type	decodeIndexedValue(java.lang.String rawInput, TypeReference<T> typeReference) Decodes an indexed parameter associated with an event.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

decode

public static java.util.List<Type> decode(java.lang.String rawInput,
                                          java.util.List<TypeReference<Type>> outputParameters)

Decode ABI encoded return values from smart contract function call.

Parameters:

rawInput - ABI encoded input

outputParameters - list of return types as TypeReference

Returns:

List of values returned by function, Collections.emptyList() if invalid response

decodeIndexedValue

public static <T extends Type> Type decodeIndexedValue(java.lang.String rawInput,
                                                       TypeReference<T> typeReference)

Decodes an indexed parameter associated with an event. Indexed parameters are individually encoded, unlike non-indexed parameters which are encoded as per ABI-encoded function parameters and return values.

If any of the following types are indexed, the Keccak-256 hashes of the values are returned instead. These are returned as a bytes32 value.

• Arrays
• Strings
• Bytes

See the Solidity documentation for further information.

Type Parameters:

T - type of TypeReference

Parameters:

rawInput - ABI encoded input

typeReference - of expected result type

Returns:

the decode value