Web3j v3 3 1 Error while generating compiled solidity smart contracts which returns array of struct

0 votes

I am returning an array of struct from solidity function as below.

pragma solidity ^0.4.21;

pragma experimental ABIEncoderV2;

function getPurchaseOrderForVendor(string vendorNameInput) constant returns (PurchaseOrderStruct[])

It is compiled to abi and bin files. The issue is with creating wrapper files for the contract using web3j(v3.3.1). Im getting the below errors.

Generating com.contract.InvoiceSettlement_sol_InvoiceSettlement ... 
Exception in thread "main" java.lang.UnsupportedOperationException: 
Unsupported type
encountered: tuple
    at org.web3j.abi.datatypes.generated.AbiTypes.getType(AbiTypes.java:221)

    at org.web3j.codegen.SolidityFunctionWrapper.buildTypeName(SolidityFunct
ionWrapper.java:851)
    at org.web3j.codegen.SolidityFunctionWrapper.buildTypeNames(SolidityFunc
tionWrapper.java:508)
    at org.web3j.codegen.SolidityFunctionWrapper.buildFunction(SolidityFunct
ionWrapper.java:523)
    at org.web3j.codegen.SolidityFunctionWrapper.buildFunctionDefinitions(So
lidityFunctionWrapper.java:216)
    at org.web3j.codegen.SolidityFunctionWrapper.generateJavaFiles(SolidityF
unctionWrapper.java:112)
    at org.web3j.codegen.SolidityFunctionWrapper.generateJavaFiles(SolidityF
unctionWrapper.java:94)
    at org.web3j.codegen.SolidityFunctionWrapperGenerator.generate(SolidityF
unctionWrapperGenerator.java:123)
    at org.web3j.codegen.SolidityFunctionWrapperGenerator.main(SolidityFunct
ionWrapperGenerator.java:87)
    at org.web3j.codegen.SolidityFunctionWrapperGenerator.run(SolidityFuncti
onWrapperGenerator.java:48)
    at org.web3j.console.Runner.main(Runner.java:38)
Jun 19, 2018 in Blockchain by charlie_brown
• 7,710 points
925 views

1 answer to this question.

0 votes

Solidity does not support returning structs in external calls. It is only allowed in internal function calls. You need to decompose the struct and return the elements via a tuple.

Source: Solidity documentation

answered Jun 19, 2018 by aryya
• 7,440 points

Related Questions In Blockchain

0 votes
1 answer
0 votes
1 answer

Web3j Transfer.sendFunds() returns Error “insufficient funds for gas * price + value”

DISCLAIMER. This may not necessarily be an answer to your ...READ MORE

answered Jun 16, 2018 in Blockchain by charlie_brown
• 7,710 points
2,306 views
0 votes
1 answer

Error while running make command using Fabric 1.0.6

It's a known issue in go 1.9.4: https://github.com/golang/go/issues/23739 While ...READ MORE

answered Jun 27, 2018 in Blockchain by Perry
• 17,100 points
494 views
0 votes
1 answer

Truffle tests not running after truffle init

This was a bug. They've fixed it. ...READ MORE

answered Sep 11, 2018 in Blockchain by Christine
• 15,790 points
1,110 views
+1 vote
3 answers

Removing double quotes from a string from JSON response in PHP

Just remove the json_encode call, and it should work: $resp ...READ MORE

answered Sep 12, 2018 in Blockchain by digger
• 26,720 points
36,161 views
0 votes
1 answer
0 votes
2 answers

How to get notified when an event triggers on ethereum smart contract?

Muchas gracias. ?Como puedo iniciar sesion? READ MORE

answered May 2, 2020 in Blockchain by aqowcmbevs
1,709 views
webinar REGISTER FOR FREE WEBINAR X
REGISTER NOW
webinar_success Thank you for registering Join Edureka Meetup community for 100+ Free Webinars each month JOIN MEETUP GROUP