smart-contracts | BRD Token and Crowdsale contracts | Cryptocurrency library

 by   breadwallet JavaScript Version: Current License: No License

kandi X-RAY | smart-contracts Summary

kandi X-RAY | smart-contracts Summary

smart-contracts is a JavaScript library typically used in Blockchain, Cryptocurrency, Ethereum applications. smart-contracts has no bugs, it has no vulnerabilities and it has low support. You can download it from GitHub.

BRD Token and Crowdsale contracts
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              smart-contracts has a low active ecosystem.
              It has 18 star(s) with 18 fork(s). There are 17 watchers for this library.
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              It had no major release in the last 6 months.
              smart-contracts has no issues reported. There are 1 open pull requests and 0 closed requests.
              It has a neutral sentiment in the developer community.
              The latest version of smart-contracts is current.

            kandi-Quality Quality

              smart-contracts has 0 bugs and 0 code smells.

            kandi-Security Security

              smart-contracts has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
              smart-contracts code analysis shows 0 unresolved vulnerabilities.
              There are 0 security hotspots that need review.

            kandi-License License

              smart-contracts does not have a standard license declared.
              Check the repository for any license declaration and review the terms closely.
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              Without a license, all rights are reserved, and you cannot use the library in your applications.

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              smart-contracts releases are not available. You will need to build from source code and install.
              Installation instructions are available. Examples and code snippets are not available.

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            smart-contracts Key Features

            No Key Features are available at this moment for smart-contracts.

            smart-contracts Examples and Code Snippets

            No Code Snippets are available at this moment for smart-contracts.

            Community Discussions

            QUESTION

            How to extract 'name' from class 'coinmarketcapapi.Response'?
            Asked 2021-Apr-07 at 21:19

            I am new to python/coding and I'm seeking some basic help to pull some elements from what I think is a dictionary. So I am executing the below.

            ...

            ANSWER

            Answered 2021-Apr-07 at 16:35

            The response basically looks like a list of dicts. So to extract names (or other keys) you can just do a list comprehension:

            [d['name'] for d in data_quote]

            Source https://stackoverflow.com/questions/66990264

            QUESTION

            Why would you delete the access keys to your NEAR account containing a smart contract?
            Asked 2021-Mar-22 at 13:51

            This answer about upgradability suggests that at some point you should delete access keys to the account containing a smart contract: How do you upgrade NEAR smart contracts?.

            It makes sense that a smart contract should be "frozen" at some point, and you want to give its users confidence that it will not be changed. But what about contract rewards and other funds belonging to the contract account? How would the original owner get access to that if keys are deleted?

            ...

            ANSWER

            Answered 2021-Mar-22 at 13:51

            But what about contract rewards and other funds belonging to the contract account? How would the original owner get access to that if keys are deleted?

            The contract should be implemented in such a way that would allow certain operations.

            Let's take a lockup contract as an example. This contract has a single owner, and the funds are locked for a certain amount of time, and the contract only provides certain methods to be called and guarded with the specific logic:

            • As an owner, I can delegate (stake) my tokens to staking pools while I still cannot arbitrary transfer the tokens
            • As an owner, I can withdraw the rewards from the staking pool through the lockup contract, and transfer those to an arbitrary account
            • Once the lockup time is over, as an owner, I can call add_full_access_key function, and thus gain full access over the account, and even delete it after that (transferring all the tokens to some other account).

            All that is explicitly implemented on the contract level, and easy to review, and given there is no other AccessKey on the lockup contract, we can be sure that there is no other way to interfere with the contract logic.

            Source https://stackoverflow.com/questions/66736229

            QUESTION

            Listening to Uniswap contract events using web3.py and infura.io
            Asked 2020-Dec-06 at 11:24

            I want to use web3.py and infura.io to listen for Uniswap factory events however I am not too sure where to go about doing so.

            Here is a link: https://uniswap.org/docs/v2/smart-contracts/factory/

            More specifically I want to listen for the PairCreated event.

            ...

            ANSWER

            Answered 2020-Jun-25 at 08:22

            Here is rough guide

            1. Get ABI for Uniswap contract

            2. Create a web3.py contract object

            3. You can use web3.eth.getLogs() to query events over past block range

            4. You cannot query all events once, because there are so many events and Infura would time out. Instead you need to query events carefully over a block range slices.

            Here is some old code which may or may not work with the latest web3.py versions

            https://github.com/TokenMarketNet/sto/blob/master/sto/ethereum/scanner.py#L153

            If you want a real time scanner you can listed to events over a WebSocket connection as they happen:

            https://web3py.readthedocs.io/en/stable/filters.html#asynchronous-filter-polling

            Source https://stackoverflow.com/questions/62377210

            QUESTION

            Cant get TRON contract ABI from Trongrid
            Asked 2020-Oct-20 at 10:57

            For some TRON contracts i am not able to get ABI. Eg using https://developers.tron.network/reference#smart-contracts for this one:

            contract - TQn9Y2khEsLJW1ChVWFMSMeRDow5KcbLSE

            ...

            ANSWER

            Answered 2020-Oct-20 at 10:57

            This is a contract created by another contract. So there's no chance for the developer to set an ABI.

            You should refer to the creator contract's code.

            Source https://stackoverflow.com/questions/64370566

            QUESTION

            How to handle exceptions in NEAR cross contract calls?
            Asked 2020-Sep-19 at 17:30
            How can I catch and handle an exception in a chain of async call between contracts?

            Suppose, that my transaction initiate the following calls:

            ...

            ANSWER

            Answered 2020-Sep-19 at 17:30

            The only way to catch an exception is to have a callback on the promise that generated the exception.

            In the explained scenario, the contractA.callback() shouldn't crash. You need to construct the contract carefully enough to avoid failing on the callback. Most of the time it's possible to do, since you control the input to the callback and the amount gas attached. If the callback fails, it's similar to having an exception within an exception handling code.

            Also note, that you can make sure the callback is scheduled properly with the enough gas attached in contractA.run(). If it's not the case and for example you don't have enough gas attached to run, the scheduling of callback and other promise will fail and the entire state from run changes is rolled back. But once run completes, the state changes from run are committed and callback has to be carefully processed.

            We have a few places in lockup contract where the callback is allowed to fail: https://github.com/near/core-contracts/blob/6fb13584d5c9eb1b372cfd80cd18f4a4ba8d15b6/lockup/src/owner_callbacks.rs#L7-L24

            And also most of the places where the callback doesn't fail: https://github.com/near/core-contracts/blob/6fb13584d5c9eb1b372cfd80cd18f4a4ba8d15b6/lockup/src/owner_callbacks.rs#L28-L61

            To point out there are some situation where the contract doesn't want to rely on the stability of other contracts, e.g. when the flow is A --> B --> A --> B. In this case B can't attach the callback to the resource given to A. For these scenarios we were discussing a possibility of adding a specific construct that is an atomic and has a resolving callback once it's dropped. We called it Safe: https://github.com/nearprotocol/NEPs/pull/26

            EDIT

            What if contractB.run fails and I will like to update the state in contractA to rollback changes from contractA.run?

            In this case contractA.callback() is still called, but it has PromiseResult::Failed for its dependency contractB.run.

            So callback() can modify the state of contractA to revert changes.

            For example, a callback from the lockup contract implementation to handle withdrawal from the staking pool contract: https://github.com/near/core-contracts/blob/6fb13584d5c9eb1b372cfd80cd18f4a4ba8d15b6/lockup/src/foundation_callbacks.rs#L143-L185

            If we adapt names to match the example:

            The lockup contract (contractA) tries to withdraws funds (run()) from the staking pool (contractB), but the funds might still be locked due to recent unstaking, so the withdrawal fails (contractB.run() fails). The callback is called (contractA.callback()) and it checks the success of the promise (of contractB.run). Since withdrawal failed, callback reverts the state back to the original (reverts the status).

            Actually, it's slightly more complicated because the actual sequence is A.withdraw_all -> B.get_amount -> A.on_amount_for_withdraw -> B.withdraw(amount) -> A.on_withdraw

            Source https://stackoverflow.com/questions/62987417

            QUESTION

            Payment.assetId data type
            Asked 2019-Apr-05 at 18:24

            I'm trying to deal with the example https://docs.wavesplatform.com/en/smart-contracts/ride4dapps/examples.html and change it a bit to extend it to any types of assets. It is not clear what type of data is returned to the function and how to bring it to the string so that it can be written to the state later.

            ...

            ANSWER

            Answered 2019-Apr-05 at 18:24

            If you try to compile your code you'll see an error like below

            Source https://stackoverflow.com/questions/55533749

            QUESTION

            Is it possible to upgrade Registry smart contract?
            Asked 2019-Mar-26 at 10:15

            I am using https://yos.io/2018/10/28/upgrading-solidity-smart-contracts/ link for upgrading smart contracts which have listed Smart Contract Upgrade Mechanisms.

            Is it possible to make change itself in registry smart contract and upgrade it.

            ...

            ANSWER

            Answered 2019-Mar-26 at 10:15

            The purpose of a registry contract is to store a mutable reference to the latest versions of your smart contract modules. It serves as a first point of access for your decentralized application.

            So there are two options if you want to upgrade a registry contract:

            • have another (fixed) registry contract pointing to your (dynamic) registry contract
            • update the reference to your registry contract in all places that use it (i.e. the frontend application)

            I hope this answers your question.

            Source https://stackoverflow.com/questions/55276364

            QUESTION

            Truffle compile fails
            Asked 2019-Mar-15 at 17:27

            whenever I try to compile any solidity project using solidity, specifically command like truffle compile it gives me an error P.S. I tried other solutions like renaming truffle.cmd or calling truffle.cmd instead of truffle and nothing works, I used windows cmd or Git Bash same error.

            ...

            ANSWER

            Answered 2019-Mar-15 at 17:27

            I had the same error with my contract. Check your solc compiler version with truffle version and check solidity version of your contract. In my case, compiler was Solidity v0.5.0 (solc-js), but the contract had pragma solidity ^0.4.11; I simply changed it to pragma solidity ^0.5.0 and reformatted code to its version requirements, contract compiled fine after. Another way to solve the problem is to edit truffle config by adding:

            Source https://stackoverflow.com/questions/55126887

            QUESTION

            Is {from: thesponsor, value: 10000000, gas: 3000000} a msg object in solidity?
            Asked 2017-Dec-03 at 16:27

            In the IBM Example of Ethereum smart contract, there is this following code:

            ...

            ANSWER

            Answered 2017-Dec-03 at 16:27

            I hope you have found a solution to your question half a year down but if you have not then..

            Yes, you are correct in your observation that the {from: thesponsor, value: 10000000, gas: 3000000} is interpreted as a transactionObject. This is because any transaction on Ethereum that causes a state change (meaning you create, update or delete data) requires a transactionObject such as the one seen above to allow your code to be executed on the blockchain.

            In the snippet below, you can see that the pledge function causes a state change on lines 4 and 5. That alone requires that you provide gas for the transaction. In addition, the pledge makes use of msg.value which is the value of the Ethereum amount that you are sending in the pledge, denoted by the value.

            Source https://stackoverflow.com/questions/43826116

            QUESTION

            How are the ethers sent to smart contract in the IBM example
            Asked 2017-May-06 at 01:17

            I was reading the IBM Example about smartSponsor, and there is this following code:

            ...

            ANSWER

            Answered 2017-May-04 at 02:36

            They are in magical variable msg. The function pledge uses this variable in the following line:

            Source https://stackoverflow.com/questions/43771620

            Community Discussions, Code Snippets contain sources that include Stack Exchange Network

            Vulnerabilities

            No vulnerabilities reported

            Install smart-contracts

            We use Truffle and OpenZeppelin for development. The main smart contracts (BRDToken and BRDCrowdsale) are based on OpenZeppelin's MintableToken and Crowdsale base contracts. For development, we use ganache-cli using the default settings. To test, start ganache-cli and run truffle test.

            Support

            For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .
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            gh repo clone breadwallet/smart-contracts

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            git@github.com:breadwallet/smart-contracts.git

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