Hello . i can't find solution to my problem.

i run yarn install & compile without error but i try "yarn test test/flashloan.test.ts" i get a error

c:\FlashLoan\poly-flash-main>yarn test test/flashloan.test.ts
No need to generate any newer typings.

Flashloan
1) "before all" hook in "Flashloan"

0 passing (316ms)
1 failing

1. Flashloan
   "before all" hook in "Flashloan":
   TypeError: Only absolute URLs are supported
   at getNodeRequestOptions (node_modules\node-fetch\lib\index.js:1305:9)
   at c:\FlashLoan\poly-flash-main\node_modules\node-fetch\lib\index.js:1410:19
   at new Promise ()
   at fetch (node_modules\node-fetch\lib\index.js:1407:9)
   at HttpProvider._fetchJsonRpcResponse (node_modules\hardhat\src\internal\core\providers\http.ts:140:30)
   at async HttpProvider.request (node_modules\hardhat\src\internal\core\providers\http.ts:55:29)
   at async getNetworkId (node_modules\hardhat\src\internal\hardhat-network\provider\utils\makeForkClient.ts:109:28)
   at async makeForkClient (node_modules\hardhat\src\internal\hardhat-network\provider\utils\makeForkClient.ts:40:21)
   at async Function.create (node_modules\hardhat\src\internal\hardhat-network\provider\node.ts:157:9)
   at async HardhatNetworkProvider._init (node_modules\hardhat\src\internal\hardhat-network\provider\provider.ts:250:28)

An unexpected error occurred:

TypeError: Only absolute URLs are supported
at getNodeRequestOptions (c:\FlashLoan\poly-flash-main\node_modules\node-fetch\lib\index.js:1305:9)
at c:\FlashLoan\poly-flash-main\node_modules\node-fetch\lib\index.js:1410:19
at new Promise ()
at fetch (c:\FlashLoan\poly-flash-main\node_modules\node-fetch\lib\index.js:1407:9)
at HttpProvider._fetchJsonRpcResponse (c:\FlashLoan\poly-flash-main\node_modules\hardhat\src\internal\core\providers\http.ts:140:30)
at async HttpProvider.request (c:\FlashLoan\poly-flash-main\node_modules\hardhat\src\internal\core\providers\http.ts:55:29)
at async getNetworkId (c:\FlashLoan\poly-flash-main\node_modules\hardhat\src\internal\hardhat-network\provider\utils\makeForkClient.ts:109:28)
at async makeForkClient (c:\FlashLoan\poly-flash-main\node_modules\hardhat\src\internal\hardhat-network\provider\utils\makeForkClient.ts:40:21)
at async Function.create (c:\FlashLoan\poly-flash-main\node_modules\hardhat\src\internal\hardhat-network\provider\node.ts:157:9)
at async HardhatNetworkProvider._init (c:\FlashLoan\poly-flash-main\node_modules\hardhat\src\internal\hardhat-network\provider\provider.ts:250:28)

c:\FlashLoan\poly-flash-main>

Appreciate the work ;)

Hi,

Is it possible to do the flashloan (polygon) with protocol 8 DODO (DodoV2swap function)?

i get this error when i excecute the flashloan with protocol 8:

Error: invalid address (argument="address", value=undefined, code=INVALID_ARGUMENT, version=address/5.4.0) (argument=null, value=undefined, code=INVALID_ARGU

I need help I have this error and I don't know how to solve it alchemy shows me that where I can edit the gas or make it work automatically
{
"id":5969739629419
"jsonrpc":"2.0"
"method":"eth_estimateGas"
"params":[
0:{
"data":NULL
"from":"0x8f4e95bea5cc0497a17be3cb35f1208fffb22a1d"
"gas":"0x1b2e020"
"gasPrice":"0x0"
"to":"0x58af3d020f4dcc419eb339ea058edc37f9d9b6f5"
"value":"0x4563918244f40000"
}
]
}

To prevent this issue
yuichiroaoki/poly-flashloan-bot#9

Describe the bug

Two arbitrage opportunities have been logged but failed with error Fail with error 'SafeERC20: low-level call failed'

The transactions are:

• 0x14986633cd0901dc74987cd6e9e3ef3d75a42e9e70f4830bf53a441a66b4e25f
• 0xe091044cfc55130d4855526cb9b99aaa7954c8a7284071b648c0cffd53bd76c9

I suspect there might be a bug with the contract, or maybe with these specific pairs?

Integration with uniswapV3 so that you can get more arbitrage opportunities

I get this error when using Yarn compile. what is?
Error HH8: There's one or more errors in your config file:

• Invalid value {"forking":{}} for HardhatConfig.networks.hardhat - Expected a value of type HardhatNetworkConfig.

To learn more about Hardhat's configuration, please go to https://hardhat.org/config/

For more info go to https://hardhat.org/HH8 or run Hardhat with --show-stack-traces

when the bot found an oportunity , the transaction not succeed du to this error
Fail with error 'Not enough amount to return loan'

To Reproduce
npx yarn deploy --network polygon

The result is:

No need to generate any newer typings.
ProviderError: execution aborted (timeout = 14s)
    at HttpProvider.request (/poly-flash/node_modules/hardhat/src/internal/core/providers/http.ts:49:19)
    at LocalAccountsProvider.request (/poly-flash/node_modules/hardhat/src/internal/core/providers/accounts.ts:181:36)
    at processTicksAndRejections (internal/process/task_queues.js:95:5)
    at async EthersProviderWrapper.send (/poly-flash/node_modules/@nomiclabs/hardhat-ethers/src/internal/ethers-provider-wrapper.ts:13:20)

Desktop (please complete the following information):

• OS: macOS
• Version 12.0.1

Based on this transaction.
What's amiss?

Hey guys. So I'm testing out this flashloan script on Remix and I get the following error message, at line 36
"from solidity:
ParserError: Function, variable, struct or modifier declaration expected.
--> scripts/POLYGON FLASHLOAN.sol:36:1:
|
36 | contract Flashloan {
| ^^^^^^^^"

This happens when I'm trying to compile the script. Any ideas what is causing this error and how to fix it? Thanks in advance

Hi there, I really appreciate you've made this open-source, really good work.

I'm new into this, I've been watching quite a few tutorials on how to deploy the contract with hardhat on mainnet.
I believe I managed to config hardhat.configs for the mainnet, but when I run the command I get this error.

Would you be kind to guide me? What do I need to do?

PS D:\Arbitrage\poly-flash-main> npx hardhat run scripts/sample-script.ts --network polygon
No need to generate any newer typings.
Nothing to compile
No need to generate any newer typings.
Error: too many arguments:  in Contract constructor (count=1, expectedCount=0, code=UNEXPECTED_ARGUMENT, version=contracts/5.5.0)
    at Logger.makeError (D:\Arbitrage\poly-flash-main\node_modules\@ethersproject\logger\src.ts\index.ts:225:28)
    at Logger.throwError (D:\Arbitrage\poly-flash-main\node_modules\@ethersproject\logger\src.ts\index.ts:237:20)
    at Logger.checkArgumentCount (D:\Arbitrage\poly-flash-main\node_modules\@ethersproject\logger\src.ts\index.ts:303:18)
    at ContractFactory.getDeployTransaction (D:\Arbitrage\poly-flash-main\node_modules\@ethersproject\contracts\src.ts\index.ts:1206:16)
    at ContractFactory.<anonymous> (D:\Arbitrage\poly-flash-main\node_modules\@ethersproject\contracts\src.ts\index.ts:1234:53)
    at step (D:\Arbitrage\poly-flash-main\node_modules\@ethersproject\contracts\lib\index.js:48:23)
    at Object.next (D:\Arbitrage\poly-flash-main\node_modules\@ethersproject\contracts\lib\index.js:29:53)
    at fulfilled (D:\Arbitrage\poly-flash-main\node_modules\@ethersproject\contracts\lib\index.js:20:58)
    at processTicksAndRejections (node:internal/process/task_queues:96:5) {
  reason: 'too many arguments:  in Contract constructor',
  code: 'UNEXPECTED_ARGUMENT',
  count: 1,
  expectedCount: 0
}

Thank you!

I'm getting this error when I'm trying to deploy.

Error: Expected private key to be an Uint8Array with length 32
at assert (C:\Users\User\V2 Smart Contract\poly-flash\node_modules\secp256k1\lib\index.js:18:20)
at isUint8Array (C:\Users\User\V2 Smart Contract\poly-flash\node_modules\secp256k1\lib\index.js:31:7)
at Object.publicKeyCreate (C:\Users\User\V2 Smart Contract\poly-flash\node_modules\secp256k1\lib\index.js:113:7)
at Object.exports.privateToPublic (C:\Users\User\V2 Smart Contract\poly-flash\node_modules\hardhat\node_modules\ethereumjs-util\src\account.ts:277:22)
at exports.privateToAddress (C:\Users\User\V2 Smart Contract\poly-flash\node_modules\hardhat\node_modules\ethereumjs-util\src\account.ts:285:26)
at LocalAccountsProvider._initializePrivateKeys (C:\Users\User\V2 Smart Contract\poly-flash\node_modules\hardhat\src\internal\core\providers\accounts.ts:183:43)
at new LocalAccountsProvider (C:\Users\User\V2 Smart Contract\poly-flash\node_modules\hardhat\src\internal\core\providers\accounts.ts:44:10)
at applyProviderWrappers (C:\Users\User\V2 Smart Contract\poly-flash\node_modules\hardhat\src\internal\core\providers\construction.ts:179:18)
at Object.createProvider (C:\Users\User\V2 Smart Contract\poly-flash\node_modules\hardhat\src\internal\core\providers\construction.ts:117:27)
at C:\Users\User\V2 Smart Contract\poly-flash\node_modules\hardhat\src\internal\core\runtime-environment.ts:80:14

I have tried with and without the 0x on my private key. If I add the 0x in the .env then I can't compile, once I remove the 0x from the private key I am able to compile but I can't deploy due to error above. 

Have you think about integrating also Balancer as AMM? It is an interesting protocol and it could be profitable to combine with Uni V2 V3 exchanges. What do you think?

Describe the bug
Got an error Fail with error 'TF', and I couldn't find any explanation to what is the cause for this failure.

https://polygonscan.com/tx/0x65b9e482bcea72395bc7dfa108d3fc6b2d4630e4915a37cf82dc96dba2861afc
https://polygonscan.com/tx/0xd683794ed3ad072a6bec9d6725363bce106bbc3b156b5aae7bf9a47557828b0e

yarn install outputs the following

Hi!!
Thanks for sharing the code!!

just a small comment on readme Step 4 I think it need to be update:

yarn test test/polygon/flashloan.test.ts
to
yarn test test/polygon/dodoflash.test.ts

Looks the test/polygon/flashloan.test.ts file don't exist any more.

Thanks

Hi there,

I've seen that dodo has BSC pools.
Will it work If I port this contract to BSC with all the right parameters, contracts, pairs, pools and everything?

I have my own private node on BSC.

Thank you!

Describe the bug
Hi
Trying the dodo flashloan example, this is the error:
Uncaught Error: Transaction reverted: function call to a non-contract account
and addressing multiple files e.g. DODOFlashloan.dodoFlashLoan (contracts/dodo/DODOFlashloan.sol:36).

To Reproduce
Steps to reproduce the behavior:
per instructions.

Do you have TG to get in contact? Thank you :)

Hello Yuichi ! i can't deploy the last commit you made ...

"yarn run deploy --netowrk polygon" doesent work neither "npx hardhat run scripts/deploy.ts --network polygon" get stuck and when i run the command from visual studio (without --network polygon) it deploy an adresse not a contract

k

what wrong please i just created my smart contract but when i want to transfert some Matic i can't https://polygonscan.com/tx/0xe0873a4e679e5c74c2692e832e6d27e601c970b0bebcc7a9ef18f7c5c28a8d81

It seems I cannot get past this issue, steps are outlined below. I have set the ALCHEMY_POLYGON_RPC_URL environment variable and left the PRIVATE_KEY environment variable blank in order to use the test configs.

This may be unrelated but I changed the WETH_WHALE in addresses.ts to 0x3fd939b017b31eaadf9ae50c7ff7fa5c0661d47c since the address assigned in main branch was not actually a WETH whale. Nothing else was changed.

The failure seems to occur during the transfer function of token.ts on line 28 in the main branch.

--

yarn test test/access.test.ts

`No need to generate any newer typings.

Access
Withdraw
1) "before each" hook for "should withdraw tokens"

0 passing (5s)
1 failing

1. Access
   "before each" hook for "should withdraw tokens":
   Error: VM Exception while processing transaction: reverted with reason string 'ERC20: transfer amount exceeds balance'
   at . (0x2791bca1f2de4661ed88a30c99a7a9449aa84174)
   at processTicksAndRejections (node:internal/process/task_queues:96:5)
   at async HardhatNode._mineBlockWithPendingTxs (node_modules/hardhat/src/internal/hardhat-network/provider/node.ts:1650:23)
   at async HardhatNode.mineBlock (node_modules/hardhat/src/internal/hardhat-network/provider/node.ts:459:16)
   at async EthModule._sendTransactionAndReturnHash (node_modules/hardhat/src/internal/hardhat-network/provider/mod
   `

Anyone can interact with your contract with this current version, so it is theoretically vulnerable to frontrunning attacks

Ideas

• Add something like the ownable modifier from OpenZeppelin to the flashloan function
  This doesn't solve the issue because some could have its own clone of your contract and if it detects a profitable transaction, create a new one against his own contract instance with a higher fee.

I was looking more at 1inch and noticed that they are use their own gas token for transactions.

One of my failed arbitrage attempts showed attempts to send to CHI in the transaction.

Just wondering if we need to indicate the 1inch gas token anywhere in the contract or the bot?

Reference:

https://soliditydeveloper.com/chi-gas

https://polygonscan.com/token/0x0000000000004946c0e9f43f4dee607b0ef1fa1c

https://polygonscan.com/token/0x0000000000004946c0e9f43f4dee607b0ef1fa1c?a=0x0000000000000000000000000000000000000000

https://polygonscan.com/address/0x0000000000000000000000000000000000000000

Hello,

you do not check the maximum flashloan amount you can get from dodo if I read your code correctly.
If I am wrong can u tell me where you do that?

If not it would be necessary to do it I think, because now your trade can get reverted because the flashloan you are asking for is bigger than the max available flashloan isn't it?

Best regards

ref.
https://docs.uniswap.org/protocol/concepts/V3-overview/swaps#safety-checks
https://ethereum.stackexchange.com/questions/90241/why-insufficient-output-amount

hi,I've read the instructions but haven't found how to run the bot. Can anyone advise?

Motives

• Minimize negative price impact
• Make it possible to trade like 1inch -> it will get to trade at the price 1inch estimates

Integration with dodo swap so that you can get more arbitrage opportunities

When i deploy the contract i use the file of deployement but i don't fount the directory "../typechain"
thank you

Error HH8: There's one or more errors in your config file:

• Invalid value {"forking":{"blockNumber":24539564}} for HardhatConfig.networks.hardhat - Expected a value of type HardhatNetworkConfig.

To learn more about Hardhat's configuration, please go to https://hardhat.org/config/

For more info go to https://hardhat.org/HH8 or run Hardhat with --show-stack-traces
PS C:\Users\ASHISH\Music\poly-flash-main\poly-flash>

yarn install

===>

help what is problem?
I try to send funds to my smart contract and this error appears
https://polygonscan.com/tx/0x081b73e1c40ece1d5dd495a9f12644d09a27896767982f39cc1ff7a3f30eb3ce