Uniswap is a decentralized finance protocol that is used to exchange cryptocurrencies. Questions should relate to programming. General questions about Uniswap should be asked on https://ethereum.stackexchange.com
Questions tagged [uniswap]
255 questions
0
votes
1 answer
Listen to uniswap events by ethers
I have a simple code that aimed to listen to Uniswap Router V3 protocol events
import { ethers } from "ethers";
import { ALCHEMY_HTTP } from "./const";
async function main() {
const provider = new ethers.providers.JsonRpcProvider(ALCHEMY_HTTP);
…
rezasadeqzadeh
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- 1
0
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3 answers
Uniswap v3 nonfungiblePositionManager.mint revert after createAndInitializePoolIfNecessary
I use the official deploy tool "successfully" to deploy Uniswap v3 to a EVM comparable testnet. After NonfungiblePositionManager.createAndInitializePoolIfNecessary(), I call NonfungiblePositionManager.mint() to mint a new position but it always…
H.Li
- 171
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- 12
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0 answers
How to effectively provide a token liquidity on uniswap for the first time?
I created 100.000 Tokens, now Id'like to provide liquidity on uniswap with 100$ (0.04 ETH) I have as of now (2022-02-25th), however these are my concerns:
What if someone bought all my tokens since it's cheaper (eg. 0.0000001 eth/token)?
If someone…
Baziwe
- 27
- 1
- 9
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0 answers
addLiquidity() function fails on UniswapV2 on local ganache instance?
addLiquidity() function reverts without any reason on local development instance of ganache, any ideas why this might be happening?
Some background:
I have forked the UniswapV2Factory and UniswapV2Router02 and deployed on ganache.
I have created 2…
Suraj Kohli
- 547
- 2
- 5
- 11
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1 answer
Transaction exited with an error (status 0) after invoking swapExactETHForTokens several times
I am experimenting with UniswapV2 on a forked local environment (ganache --fork [mainnet]. I am able to deploy my own token, interact with the uniswapv2 contracts located on the fork and add liquidity to token/eth pair. Next I am able to do one…
Ramdiman
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- 3
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1 answer
How to get historical swap data from different exchanges using web3js
This is what I want to achieve
The web3.eth.getTransaction() doesn't provide the data I am looking for. I want to get historical data of a swap from token to the token and the amount.
Thanks for the help in advance.
Subhrajyoti Basu
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- 1
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votes
2 answers
Uniswap error:A transfer error ocurred when invoking `fpoSwap.swapAndLiquidity()` in the `_transfer` function
These codes send a transaction to uniswap contract and charge some handling fee, adding Liquidity to the Capital pool. However, I don't know where the "_transfer" function is wrong, which calls fpoSwap.swapAndLiquidity(), a method in the "FPOSwap"…
Yg Hu
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- 1
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1 answer
Example for addLiquidity method of UniswapV2 Router
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 <=…
invisiblecat
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- 10
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votes
1 answer
TypeError: "msg.value" and "callvalue()" can only be used in payable public functions
In my contract I'm trying to swap Eth for Dai using Uniswap's swapExactETHForTokens() function:
pragma solidity ^0.6.6;
interface IUniswap {
function swapExactETHForTokens(
uint amountOutMin,
address[] calldata path,
address to,
…
Jasperan
- 2,154
- 1
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0
votes
1 answer
How can I take back control of the uniswapV3 pool
Earlier I released a token at 0x779084304ff90e8be79d5c4dbd1ca323b9ac555e and it has been listed on the uniswapV3 exchange. Since the wallet was stolen, I did a transferOwnership to a new wallet, but there was no transfer pool. Finally, I published…
user15252498
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- 2
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votes
1 answer
Solidity - External contract call not working
So, I'm new to solidity and I've been trying to make a contract that can call another contract.
I've found some articles describing this exact problem such as: https://soliditydeveloper.com/uniswap2
Altough, even with the provided code I can't make…
nfnvsc
- 49
- 4
0
votes
1 answer
Uniswap V3 AlphaRouter - "Failed to get subgraph pools from any providers"
I am trying to swap WETH against MyToken from a previously created Uniswap V3 pool on Arbitrum Rinkeby. When calling AlphaRouter.route, however, I get the following error message
Failed to get subgraph pools from any providers
What is still…
Homer
- 239
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0 answers
Invalid or incomplete introspection result
When I am trying to run the below subscription code I am getting the error:
TypeError: Invalid or incomplete introspection result. Ensure that you are > passing the 'data' attribute of an introspection response and no 'errors' > were returned…
0
votes
1 answer
A problem with uniswap v2 periphery contract, can't make a swap through my own contract using the interfaces
I have deployed this code on ropsten testnet to test uniswap swaps. I am trying to make swap using function "swap" of my contract with this data path:
0xc778417E063141139Fce010982780140Aa0cD5Ab,0xad6d458402f60fd3bd25163575031acdce07538d, 1000000,…
StayAway
- 1
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votes
2 answers
Questions about ABI in Solidity
I'm studying Uniswapv2 codes and I got stucked with ABI. https://github.com/Uniswap/v2-core/blob/master/contracts/UniswapV2Pair.sol
Why use ABI with call method, even if we can call transfer function from interface directly?
bytes4 private…
SungJunEun
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