Lession 7: Rinkeby Staging test, Error: cannot estimate gas; transaction may fail or may require manual gas limit

[cxiong22]

    : describe("FundMe Staging Tests", async function() {
          let fundMe
          let deployer
          const sendValue = ethers.utils.parseEther("0.1")
          beforeEach(async function() {
              deployer = (await getNamedAccounts()).deployer
              fundMe = await ethers.getContract("FundMe", deployer)
          })

          it("allows people to fund and withdraw", async function() {
              const fundTxResponse = await fundMe.fund({ value: sendValue })
              await fundTxResponse.wait(1)

This piece of code is from the FundMe.staging,js.test file. I ran the code through the Javascript debug terminal and found out that the error I had occured during this part:

const fundTxResponse = await fundMe.fund({ value: sendValue })

This is the error I got when running yarn hardhat test ---network rinkeby. The strange thing is that I don't get any errors when I ran this locally on the Hardhat runtime environment.

Error: cannot estimate gas; transaction may fail or may require manual gas limit [ See: https://links.ethers.org/v5-errors-UNPREDICTABLE_GAS_LIMIT ] (reason="execution reverted", method="estimateGas", transaction={"from":"0x3D7ca899e752683801658FF3012096CAd49E5b74","to":"0xE6101f3Bf5e9725F03C8F1f36c86059B2Cf34a5E","value":{"type":"BigNumber","hex":"0x016345785d8a0000"},"data":"0xb60d4288","accessList":null}, error={"name":"ProviderError","code":-32000,"_isProviderError":true}, code=UNPREDICTABLE_GAS_LIMIT, version=providers/5.6.8)

I've looked at other discussions where people had similar issues, and saw that they put their gas limits manually in the hardhat.config.js file to resolve this issue. I tried that and got this error.

Error: transaction failed [ See: https://links.ethers.org/v5-errors-CALL_EXCEPTION ] (transactionHash="0x8371b749c99ef729474a074e869c3e984b5510b12c76d6715b78380be758acda", transaction={"hash":"0x8371b749c99ef729474a074e869c3e984b5510b12c76d6715b78380be758acda","type":2,"accessList":[],"blockHash":null,"blockNumber":null,"transactionIndex":null,"confirmations":0,"from":"0x3D7ca899e752683801658FF3012096CAd49E5b74","gasPrice":{"type":"BigNumber","hex":"0x59682f0a"},"maxPriorityFeePerGas":{"type":"BigNumber","hex":"0x59682f00"},"maxFeePerGas":{"type":"BigNumber","hex":"0x59682f0a"},"gasLimit":{"type":"BigNumber","hex":"0x4c9e58"},"to":"0xE6101f3Bf5e9725F03C8F1f36c86059B2Cf34a5E","value":{"type":"BigNumber","hex":"0x016345785d8a0000"},"nonce":19,"data":"0xb60d4288","r":"0x3a784172efee8149cb42dc6fa1bae1469873fa5e30a81f5bfcf32aef5a10c3ae","s":"0x3e9b786640090588dd21c88718859135ae1c5ac8b352aabad03eb03c781a42ef","v":1,"creates":null,"chainId":4}, receipt={"to":"0xE6101f3Bf5e9725F03C8F1f36c86059B2Cf34a5E","from":"0x3D7ca899e752683801658FF3012096CAd49E5b74","contractAddress":null,"transactionIndex":5,"gasUsed":{"type":"BigNumber","hex":"0x65fb"},"logsBloom":"0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000","blockHash":"0x38394dfffd305cb612102c44d2aee3d32d42245ddf40690a8e0d6af8c2d35e42","transactionHash":"0x8371b749c99ef729474a074e869c3e984b5510b12c76d6715b78380be758acda","logs":[],"blockNumber":11334868,"confirmations":1,"cumulativeGasUsed":{"type":"BigNumber","hex":"0x134648"},"effectiveGasPrice":{"type":"BigNumber","hex":"0x59682f08"},"status":0,"type":2,"byzantium":true}, code=CALL_EXCEPTION, version=providers/5.6.8)

Here is a link to my github repo of the FundMe.staging,js.test file. Please let me know what I might have done wrong because I've followed the tutorial pretty closely while checking through the github repo of the tutorial.
https://github.com/cxiong22/hardhat-fund-me-fcc/blob/main/test/staging/FundMe.staging.test.js

[RoboCrypter]

@cxiong22 : I have a made a PR in your repo, You can merge it, and check it out!

Let me know if it works!

[cxiong22]

It didn't work. I'm not sure if the problem would be with the code I have or if there are new updates in Rinkeby that might be causing these kinds of errors because the test runs perfectly fine on the local Hardhat network.

[RoboCrypter]

@cxiong22 : Yes, I'm afraid now a days rinkeby is causing a lot of problems for testing and stuff, due to its depreciation!

Try another testnet, like goerli.

Hopefully, It will work!

[cxiong22]

I guess the problem was with rinkeby because after switching over to goerli with the right adjustments everything works fine now. Thanks.

[krakxn]

Before I look into your repo, please try Goerli/Kovan.

[cxiong22]

Yeah I wasn't aware that rinkeby was having problems because I thought that it would be fine since rinkeby would be operational until next year. I tried goerli with the right adjustments and it works fine now. Thanks.

[krakxn]

Rinkeby is deprecated post-merge, which is very close.

[RoboCrypter]

Try to run on goerli

…

On Thu, Sep 8, 2022, 1:17 AM cxiong22 ***@***.***> wrote: [image: Screenshot from 2022-09-07 15-04-52] <https://user-images.githubusercontent.com/102254112/188967683-4ab643d8-35a5-432b-8fa2-f2d8907fb84e.png> It didn't work. I'm not sure if the problem would be with the code I have or if there are new updates in Rinkeby that might be causing these kinds of errors because the test runs perfectly fine on the local Hardhat network. — Reply to this email directly, view it on GitHub <#2367 (reply in thread)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AZ7TJAYTDXOWGGQPYG46W7DV5DZ4JANCNFSM6AAAAAAQGGOZCQ> . You are receiving this because you commented.Message ID: <smartcontractkit/full-blockchain-solidity-course-js/repo-discussions/2367/comments/3588724 @github.com>