Questions tagged [contract]

424 questions
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Tron blockchain : Filters not working on get events

Trying to apply filter on contract event But it always return all records seems like filter not working. this.CONTRACT_ADDRESS, { eventName: "InvoiceLog", filters: { '_invoiceId': id.toString()}, } …
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Spring Cloud Contract Content type not supported

I am using spring cloud contract and I am getting the error 2020-06-23 23:27:41.940 WARN 39531 --- [main] .w.s.m.s.DefaultHandlerExceptionResolver : Resolved [org.springframework.web.HttpMediaTypeNotSupportedException: Content type…
Sparkmuse
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How to autoextend maximo contract at due date?

I'm trying to know whether there is a standard way to auto extend a Maximo contract at due date. In most Maximo contract application, there are fields to set up auto extend but there is not any cron task to handle such purpose. Do I really have to…
Bigmwaj
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Could not find metadata maven-metadata.xml in remote(nexus)

I use spring-contract as contract test in my project with gradle. I want to publish the contract stubs to nexus server. But when I execute the publishing command. The error occur. build.gradle file buildscript { project.ext { bootVersion…
Xin
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Better way to define a contract for a function with a lot of keyword arguments

Say I have a function that takes a lot of homogeneous keywords arguments: (define (my-function #:arg1 arg1 #:arg2 arg2 ; etc. #:argN argN) (do-something)) "Homogeneous" in the sense…
Xophmeister
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Contract testing for multiple events in the same destination

I've got this configuration: spring: cloud.stream.bindings: input-product-created: content-type: application/json destination: output-product-management input-product-deleted: content-type: application/json …
MuchaZ
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Spring Cloud Contract LocalDateTime assertions fail

for the last day i've been struggling with the LocalDateTime in Spring Contract Tests. base class: @SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.MOCK) public abstract class VennotenDossiersConsumerBase { @Autowired private…
Bart Duwez
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Converting bytecode of Solidity smart contract back to its original state

If I deploy a smart contract on the Ethereum blockchain and I don't want anyone else to see the content of my code, could they see it by converting the bytecode of the contract -easily- using some kind of tool/decompiler/decryption? For example I…
Warrax
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How to start with PACT contract testing in java for a newbie

I have to do a POC on contract testing using pact, but I couldn't found anything helpful for a newbie. Can someone help me with the working code, how to install, execute I will be grateful.
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Is post-condition of the function valid in all cases or only if the function is successful?

Let's say I have a following function: int reserve(DmaChannel& channel, const uint8_t request) { const auto ret = channel.reserve(request); if (ret != 0) return ret; channel_ = &channel; return 0; } It is clearly visible,…
Freddie Chopin
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How to check empty in solidity

In solidity can we check if(empty) just like we do in php Or anything equivalent to that. What I want to do is to check if msg.sender trigger the call with empty msg.value or has put some amount to trigger the function if (empty(msg.value))
Ophelia
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Defining racket contracts with a custom predicate

I'm just starting to learn about contracts (via exercism.io) and so I have made a contract that is: [step1 (-> (and/c number? less-than-one-hundred?) string?)] What I think I'm saying is the function will take a number…
robertpostill
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Solidity: Error when calling a function of another contract. Error: The constructor should be payable when you send value

I am playing around with Solidity and I thought of seeing how a test marketplace would function. However, I seem to have run into an issue which I cant seem to figure out. The code is shabby because I am just trying to figure out how it works on the…
M65D85
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how verifies the nonce produced by ethash through contract && add new opcode in EVM

I want to verify the pow of memory of one computer, then I use the ethash algorithm that used by ethereum to do the work. The problem is that the cache and dataset in the algorithm is too large for contracts. How can I verify the work? In my…
Sanghai
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crowdsale from existing token contract solidity

I am getting started with the solidity ethereum smart contracts, and am trying to make a crowdsale contract for an existing token which I am holding in my wallet. Can someone take a look at my contract and explain me what I am doing wrong…
Thomas
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