smart-contract | Privatix Token Contact | Blockchain library

by Privatix JavaScript Version: Current License: MIT

X-Ray Key Features Code Snippets(1)Community Discussions(10)Vulnerabilities Install Support

kandi X-RAY | smart-contract Summary

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

Privatix Token Contact holds all PRIX tokens and compliant with the ERC20 standard.

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Quality

Security

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Support

smart-contract has a low active ecosystem.

It has 8 star(s) with 3 fork(s). There are 15 watchers for this library.

It had no major release in the last 6 months.

smart-contract has no issues reported. There are no pull requests.

It has a neutral sentiment in the developer community.

The latest version of smart-contract is current.

Quality

smart-contract has 0 bugs and 0 code smells.

Security

smart-contract has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

smart-contract code analysis shows 0 unresolved vulnerabilities.

There are 0 security hotspots that need review.

License

smart-contract is licensed under the MIT License. This license is Permissive.

Permissive licenses have the least restrictions, and you can use them in most projects.

Reuse

smart-contract releases are not available. You will need to build from source code and install.

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smart-contract Key Features

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

smart-contract Examples and Code Snippets

Deploys a smart contract .

java

Lines of Code : 23

License : Permissive (MIT License)

Copy

private void deployContract() throws Exception{

        Web3j web3j = Web3j.build(new HttpService("https://rinkeby.infura.io/"));

        Credentials credentials =
            WalletUtils.loadCredentials(
               "",
               "/path/to

Community Discussions

Trending Discussions on smart-contract

How to avoid call-stack attack in the case of absence of EIP-150?

How do I interact with Uniswap V2 in a Truffle test suite?

How to create the pair without assembly in UniswapV2Factory

Parsing a nested json using gson

Truffle - Pet Shop - Errors on All Tests (.sol)

JAVA how to convert JSONObject into a custom format?

OpenSea isApprovedForAll and proxy addresses functionality

Solidity reentrancy bug in remix.ethereum

Example for addLiquidity method of UniswapV2 Router

UniswapV2 swapExactTokensForETH approve and transfer

QUESTION

How to avoid call-stack attack in the case of absence of EIP-150?

Asked 2022-Mar-21 at 21:56

While before EIP-150, could we avoid the call-stack attack by checking return value, of low-level functions .send(), .call(), .delegatecall() and .staticcall(), whether is false or not?

For example (msg.sender is a contract):

...

ANSWER

Answered 2022-Mar-21 at 21:56

I found the answer: Nope. Because, in this attack, call-stack slots are filled before execution reaches return of calling contract. A way of preventing could be calculating expected amount of required gas for called function; setting the gas amount of calling function with respect to this.

Source https://stackoverflow.com/questions/70218639

QUESTION

How do I interact with Uniswap V2 in a Truffle test suite?

Asked 2022-Mar-12 at 21:28

I am looking for a way to create an automated test suite with Truffle that can test my smart contract's interactions with Uniswap V2. The Uniswap docs briefly mention testing with Truffle but do not provide any examples. I am looking to test it using a mainnet fork with ganache.

I'm guessing it's a similar process to the accepted answer for this question, but I'm specifically looking for a way to do it using Truffle and web3.js.

As an example, if I were testing the following contract:

...

ANSWER

Answered 2022-Feb-12 at 12:48

If you use Uniswap platform to swap a token, you are going to have 2 steps. You are going to approve the token, in this step metamask will pop-up and you are going to confirm it. Then Uniswap will do the actual swap, it takes the tokens out of your wallet and does the exchange for you.

This is the swapExactETHForTokens function

Source https://stackoverflow.com/questions/70965282

QUESTION

How to create the pair without assembly in UniswapV2Factory

Asked 2022-Mar-06 at 22:04

I'm going to deploy the Uniswap contract on my customized Ethereum.

Could I replace fancy footwork in the factory by Solidity code?

I need to update this code assembly { pair := create2(0, add(bytecode, 32), mload(bytecode), salt)} into general solidity code.

I tried this, but not working well.

...

ANSWER

Answered 2022-Mar-05 at 12:08

Uniswap version 1 uses library contracts with hardcoded pair contract addresses.

First deploy the factory contract
Then call Factory.pairCodeHash - the hardcoded hex string of the init code
Replace the pair code hash in the source code, compile the rest of the contracts

More tips in this Python module.

Source https://stackoverflow.com/questions/71361970

QUESTION

Parsing a nested json using gson

Asked 2022-Mar-05 at 16:26

What I am trying to do is to parse nested json data into a Java object using Gson and print it out with customized toString().

The Json Content

...

ANSWER

Answered 2022-Mar-05 at 16:26

The issue is in these lines:

Source https://stackoverflow.com/questions/71362843

QUESTION

Truffle - Pet Shop - Errors on All Tests (.sol)

Asked 2022-Mar-03 at 22:54

I am following the pet shop tutorial on Truffle. The first few steps work, i.e., I can compile and migrate the Adoption contract. My software versions are:

Truffle v5.4.33 (core: 5.4.33) Ganache v7.0.1 Solidity v0.5.16 (solc-js) Node v17.6.0 Web3.js v1.5.3

Adoption contract code:

...

ANSWER

Answered 2022-Mar-03 at 17:47

Your contract requires only pets with IDs between 0 and 5 can be adopted:

Source https://stackoverflow.com/questions/71327641

QUESTION

JAVA how to convert JSONObject into a custom format?

Asked 2022-Mar-02 at 18:45

What I am trying to do is to change a certain JSON file into a custom format, and I have been searching for the information for two days but I haven't figured it out and I have no one to ask about this....

Before Formatting

...

ANSWER

Answered 2022-Mar-02 at 18:45

Don’t use a HashMap. Create real data classes:

Source https://stackoverflow.com/questions/71325767

QUESTION

OpenSea isApprovedForAll and proxy addresses functionality

Asked 2022-Feb-25 at 08:54

I found an explanation here, but I want to clarify some moments.

Is the isApprovedForAll method needs to be overwritten in ERC721Tradable if we need to get rid of excess fees for approval? Is proxy addresses for each user unique? If it isn't, do we need to add something like

...

ANSWER

Answered 2022-Jan-21 at 09:55

As displayed in deploy script for OpenSea Creatures contracts (lines 27-32), there is one address for each network:

Source https://stackoverflow.com/questions/70713612

QUESTION

Solidity reentrancy bug in remix.ethereum

Asked 2022-Feb-16 at 19:24

I am trying to reproduce a reentrancy bug from this article

My config:

Version: pragma solidity ^0.7.0;
IDE: remix.ethereum

Step 1: I deployed Etherbank Contract with the following address: 0x5B38Da6a701c568545dCfcB03FcB875f56beddC4

// SPDX-License-Identifier: MIT pragma solidity ^0.7.0;

...

ANSWER

Answered 2022-Feb-16 at 19:24

My bad! I was trying to pass the address of the wallet (which deploy EtherBank) rather than the Etherbank contract address in the Attacker contract constructor. Everything works well now.

Here is a good explanation about the differences between wallet address and contract address:

Source https://stackoverflow.com/questions/71115106

QUESTION

Example for addLiquidity method of UniswapV2 Router

Asked 2022-Feb-10 at 14:01

I am reading through UniswapV2 docs and can't understand the inputs of addLiquidity method properly. As listed in the docs:

amountAMin (uint): Bounds the extent to which the B/A price can go up before the transaction reverts. Must be <= amountADesired.

amountBMin (uint): Bounds the extent to which the A/B price can go up before the transaction reverts. Must be <= amountBDesired.

What does it mean? Can you please give an example? Let's say, I set amountADesired and amountBDesired to 4 and amountAMin and amountBMin to 1. What will happen?

...

ANSWER

Answered 2022-Feb-10 at 14:01

blockchain transactions are not immediate, but must queue before being mined on the blockchain and be effective

When you add liquidity given amountADesired you have to give it amountBDesired in proportion to the existing pair (example pair: 2:1 you have to put 2 tokens A and 1 token B)

once you send the transaction, before it is mined it may happen that others make operations on that liquidity pool, changing the proportion accordingly

by entering amountAmin and amountBmin you are practically telling him: "as long as the proportion is between amountADesired:amountBDesired and amountAMin:amountBmin accepts my liquidity addition, if instead the proportion exceeds my range, cancel my transaction"

Source https://stackoverflow.com/questions/71064601

QUESTION

UniswapV2 swapExactTokensForETH approve and transfer

Asked 2022-Jan-13 at 21:15

I have tried to create a smart contract. I followed this tutorial to have uniswap swap examples https://cryptomarketpool.com/how-to-swap-tokens-on-uniswap-using-a-smart-contract/

Here one of my smart contract function in which I would like to swap some token amount for some eth.

...

ANSWER

Answered 2022-Jan-13 at 21:15

ERC20: transfer amount exceeds allowance

This is a custom error message from a contract.

Based on the context, I'm assuming it's coming from the token contract's function transferFrom() (or another function called by this one), from a failed require() condition.

Which means that the accounts[1] (user executing the swapTokenToEth() function) haven't approved the dex contract to manipulate their tokens.

Solution: Before executing dex.swapTokenToEth(), you also need to execute tokenContract.approve(dexAddress) from the accounts[1] address. It's sufficient to execute the approve() function just once (unless you redeploy the contracts) with a sufficient amount - the approval decreases with each amount used in the transferFrom() function.

Source https://stackoverflow.com/questions/70702899

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