Questions tagged [bsc]
Binance Smart Chain (BSC) is a blockchain network built for running smart contract-based applications.
171
questions
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5 views
Can i get step by step instructions to fork GETH [duplicate]
Can I get step-by-step instructions to fork GETH then make a public node with a private network RPC, chain id, and native coin?
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12 views
Contract in bsctestnet cannot be verified
I tried to deploy my tokens on BSC testnet using remix.
But I always get an error when I verify. I tried a lot of methods, but still no solution.
In fact the generated Bytecodes are not wrong, but I ...
0
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0answers
17 views
Is the rate limit of bsc rpc endpoint for single user or all users that are using it at the same time? [closed]
I'm trying to build a bot that gets all of the transactions that occur in the BSC mainnet, I leant that there is a rate limit for the json rpc endpoints: https://docs.binance.org/smart-chain/developer/...
0
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1answer
7 views
Subscribing to ERC20(BEP20) events, in BSC
I am trying to setup a node to be able to query all BEP20 transactions in real time.
My eth.syncing stats are:
> eth.syncing
{
currentBlock: 9489998,
highestBlock: 9490087,
knownStates: ...
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0answers
22 views
Got hacked via DEX? Funds are missing
Yesterday I bought some tokens using pancake swap in BSC. Today when i went to check them i had 0 funds in the BSC network.
Transaction hx is ...
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0answers
16 views
Can I use a smart contract to receive payment from all users using BNB? [duplicate]
I have to receive payments from all users using my website by bnb only which I will receive in smart contract address.
I am not using any token to receive payment so can I receive it.? Secondly please ...
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0answers
17 views
Crowdsale smart contract frontend creation
I wanted to make a front end webpage for buyflamecoin function in my crowdsale smart contract.
Crowd sale contract link : https://bscscan.com/address/0x959a4c2980ee9541b7359a1ab67b3b963c33ab93
Can ...
0
votes
1answer
26 views
Please help me fix this. VM error: revert
//SPDX-License-Identifier: MIT
pragma solidity ^0.7.4;
/**
* Standard SafeMath, stripped down to just add/sub/mul/div
*/
library SafeMath {
function add(uint256 a, uint256 b) internal pure ...
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0answers
20 views
tx fee (5274661132.35 ether) exceeds the configured cap (1.00 ether) Web3 JS
New to web3 JS. using Binance Smart Chain (mainnet) :(
I am getting this error:
tx fee (5274661132.35 ether) exceeds the configured cap (1.00 ether)
Below are my parameters (done on php for some ...
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0answers
13 views
Switching between different networks in Metamask using web3 or any other automated way
I have two different smartchains in Metamask wallet
ETH
BSC
Now I want to transfer money from one network to the other in the same wallet address either using web3.js or any other possible ...
0
votes
1answer
57 views
Verify BEP20 token created by another smart contract
I am making Factory contract to automatically create a BEP20 token for my users.
It can normally create a BEP20 token but I am not able to verify it through BSCscan.
My contract code is below:
// SPDX-...
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0answers
8 views
Error 'ds-math-sub-underflow' when trying to use pancakeswap router contract
I'm coding a simple app in node.js to retrieve token prices. I am using router contract '0x10ED43C718714eb63d5aA57B78B54704E256024E' and ethers.js library
Most addresses seem to work correctly, but ...
0
votes
1answer
26 views
Smart contract to exchange old bep20 tokens for new ones
I've created two Bep20 tokens (old/new) and I was wondering if I could write a smart contract that exchanges/swaps old tokens for new ones.
Is there a simple way to exchange two Bep20 tokens using a ...
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0answers
19 views
Retrieve APR data from Pancakeswap Finance [BSC]
Is there an API by Pancakeswap Finance (BSC) to receive the APR for each farm and pools?
I personally don't wan't to calculate all APR individually by hand.
0
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1answer
20 views
Failed transaction uses up all the gas instead of a small part needed to revert the execution
On BSC, usually when your transaction to a contract fails such a tx uses about 30k gas when you do it through a wallet. But when a transaction made with an ethers.js script fails, it uses all the gas ...
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1answer
55 views
Binance Smart Chain RPC Rate Limit
In the BSC documentation, it says that we can make 10K/5mins RPC requests to their servers. Do you guys know if it's 10K per app or user?
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1answer
28 views
Is there a way to lower BEP20 smart contract function gas fee costs?
A BEP20 smart contract needs to have a function called periodically (At least once a day) to process some data. The gas fee required to do so is quite high (>0.1 BNB every call). What are some ways ...
2
votes
1answer
368 views
How do I get the implementation contract address from the proxy contract address?
I'm using web3.py to interact with multiple unknown contracts, where I don't know beforehand if a contract is a proxy contract or the actual contract. I'm getting the ABIs for the contracts on-the-fly ...
0
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0answers
7 views
Getting correct decimals in ethers.io library, using getAmountsOut() ABI
I am using the getAmountsOut() interface to get the current PancakeSwap price of a random BSC token that has 9 decimals in its smart contract, see https://bscscan.com/token/...
0
votes
1answer
46 views
How to deal with liquidity for a BEP-20 token?
I've released a few BEP-20 tokens so far and some of them have been quite successful at launch but then suffer from lack of perpetual marketing, my team and I are dealing with this challenge.
However, ...
0
votes
1answer
70 views
Trying to get working wallectconnect/web3modal on safari/ios
I'm trying to get a React site work with web3modal and walletconnect.
When in a Metamask browser, my dapp on BSC works, but on Safari (MacOs and iOS), I show the web3modal, user gives permissions to ...
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0answers
14 views
Is adding logo only once to the blockchain or is it specific to each exchange?
I have created a new token and I want to add a logo to it. If I add it to BSCScan or EtherScan (following the requirements like website,email,etc...), then I go to exchanges like Poocoin - does it ...
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0answers
11 views
Although one or more Error Occurred[execution reverted] [duplicate]
actualy i use justliquidity to place order token change to bnb in price 0.0002 but i cant cancel my order and trustwallet connect justliquidity and i cant how solve probleme and when click cancel ...
1
vote
1answer
53 views
Web3.js: account.signTransaction is too slow
I'm developing a swap bot to swap tokens on BSC using PancakeSwap router. so this is my code
import {account, web3} from '../index.js';
const timeOut = Math.floor(new Date().getTime() / ...
0
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1answer
22 views
Can you directly port ETH mainnet contract to BSC?
Can you directly port ETH mainnet contract to BSC ? Also, does Infura work with BSC ? Does Web3 work with BSC ?
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1answer
16 views
How does CAKE get burnt since all the burn functions are internal in the source code
I am trying to study CAKE of Pancakeswap source code. I don't seem to grasp how does the owner or users burn the tokens(CAKE) since all burn functions in the source code are internal functions. on of ...
0
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0answers
10 views
Do we use Jager or Wei for BSC?
I am trying to prepare a transaction by using etherjs, but I can't find a trustable source to know which units to use, does ethersjs know what to do just by having the right provider URL ?
Since Jager ...
0
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0answers
32 views
Retrieving APY from PancakeSwap CAKE auto-compounding pool
Looking at the contract from the CAKE auto-compounding pool (https://bscscan.com/address/0xa80240Eb5d7E05d3F250cF000eEc0891d00b51CC#code), it appears there is no direct call for calculating the ...
0
votes
1answer
206 views
Gas estimation errored with the following message (see below). i am trying to deploy in bsc testnet
i am trying to deploying a contract to bsc testnet but it getting this error :
Gas estimation errored with the following message. The transaction execution will likely fail. Do you want to force ...
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0answers
17 views
tokens do not appear in wallet after contract creation
I'm doing the tests for creating a token. After compiling everything without any error, deploying and confirming it on the testnet network, the tokens do not appear in the wallet, and in testnet.bsc, ...
0
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1answer
98 views
Check valid slippage before sending transaction using web3
I have a web3 script that buys and sells the token on Binance Smart Chain (BSC). Now let's say there is a token that has mentioned a mandatory 10% fee in their contract but I don't know about that at ...
0
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0answers
36 views
How can I listen emitted events from BSC network
How can I noticed and get the results of events whenever events are emitted on BSC network.
I have tried web3.on() method, but the on() method can work with WebSocketProvider and BSC network does not ...
0
votes
1answer
38 views
Creating complex transaction
I need help with understanding how this transaction was created.
Link: https://bscscan.com/tx/0x02fa7264da976f01138b452b737350e4382e54fa60ee8b68b23b2efabb43c54a
How it is possible to make a ...
0
votes
1answer
24 views
What are my constructor arguments ABI-Encoded (noob)
pragma solidity ^0.8.2;
contract Token{
mapping(address => uint) public balances;
mapping(address => mapping(address => uint)) public allowance;
uint public totalSupply = ...
0
votes
1answer
161 views
What is the fastest way of continuously selling portions of my tokens using web3.py?
I am a beginner using web3py. I want to sell portions of my token holdings at a fast rate. Is it possible to do it without having to put in time.sleep() for the delay of waiting for approval? I tried ...
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0answers
65 views
Understand price impact and liquidity in pancakeswap
I am trying to understand how the price impact and liquidity was calculated in uniswap or pancakeswap through the router contract?
UNI Router: https://etherscan.io/address/...
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0answers
73 views
Scam: Variation of the price of the token in 5 orders of magnitude in a second. How does it work?
When purchasing a token, the wrong price is displayed. Specifically,
trade.minimumAmountOut (slippageTolerance).raw
('trade' object is from @pancakeswap-libs/sdk-v2)
minimumAmountOut shows much less ...
1
vote
0answers
26 views
How does “migrate” function in PancakeSwap Staking Contract work?
I am discovering PancakeSwap Staking contract ! How exactly this below function works ?
Here is address contract https://bscscan.com/address/0x73feaa1ee314f8c655e354234017be2193c9e24e#code
// Migrate ...
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0answers
48 views
How “ migrate ” function on PanCake Masterchef Smart Contract work?
Hi folks, I am discovering PancakeSwap Staking contract ! How exactly this below function works ?
Here is address contract : https://bscscan.com/address/0x73feaa1ee314f8c655e354234017be2193c9e24e#code
...
0
votes
0answers
242 views
Pancakeswap Error when trying to swap token to BNB using Web3.js and Python
I have written a Swap in python using web3.js. I can't seem to get it to work when I try to buy BNB for tokens. The transaction is created, but the Pancakeswap router gives me the following error:
...
0
votes
0answers
30 views
How to view staking rewards on blockchain? (Pancake Swap)
I recently staked CAKE in Pancake Swap's CAKE auto-compounding SYRUP pool. I get regular, auto-compounding rewards. No problem here.
However, I need to see the individual transactions (i.e. have a ...
1
vote
0answers
28 views
Same contract can have different contract creation code?
Deploying a factory contract in Hardhat console and BSC testnet gives me different INIT_CODE_PAIR_HASH using the line of code below. Pair is a contract imported externally and should be the same in ...
0
votes
1answer
72 views
JSON-RPC Error - Exection Reverted (-32000) / Empty ABI
I am attempting to deploy a BEP20 contract on BSC testnet via Remix. I am using compiler v6.12 and am successfully compiling my Solidity. However, when I deploy the contract, I am receiving the ...
2
votes
0answers
36 views
What is the best way to accept either custom erc20 token or ether
I am working on marketplace smart contract where users can sell erc721 tokens. Everything seems to be working.
I wanted to receive the erc20 token and ether both as payment methods. So what I do is to ...
0
votes
1answer
209 views
WalletConnect web3 provider issue with TrustWallet (Multi-coin wallet)
I am using walletconnect/web3-provider to try to connect to trustwallet ios APP. My config on walletconnect is listed below:
try {
console.log("Log in with connect wallet")
const ...
0
votes
1answer
254 views
swapExactTokensForETHSupportingFeeOnTransferTokens fails for some tokens when called from script, but works when submitted from Pancakeswap
I have a simple code using web3.py that sells BEP20 tokens:
deadline = int(time.time()) + 1200;
nonce = w3.eth.get_transaction_count(w3.eth.default_account)
sellTxn = self.web3Context.routerContract....
0
votes
1answer
31 views
Pancakeswaps Router 2.0 swapExactTokensForTokens fails. No errors
Please tell me why this tx is failed?
https://bscscan.com/tx/0xa5d5df02bfd7ea6f69664f3f404973e572fca20b35e0c5d27fd74aea0fe3b5cf
Tx Data:
0 amountIn uint256 66350193942313470867
1 amountOutMin ...
1
vote
2answers
621 views
Is there a way to convert Binance pegged tokens into Ethereum based tokens?
This is confusing me a lot. Basically if you have a metamask wallet and have some BNB there, and you use PancakeSwap for example, even if you convert the BNB into ETH or BTC, it won't be the real ...
3
votes
1answer
240 views
Web3: Get token address from pair address
I am studying all listed pairs on Pancakeswap. I get the pair address from
PCS_FACTORY_ADDRESS="0xca143ce32fe78f1f7019d7d551a6402fc5350c73"
PCS_FACTORY_ADDRESS = Web3.toChecksumAddress(...
0
votes
1answer
27 views
How can I Recover funds sent to a contract created with remix.etherum.org?
Trying to get experience on blockchain and smartcontracts, I created a contract on remix.etherum.org. I sent funds to that contract and now the funds are stagnant, in limbo. Since I am the contract ...
