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ssadek1976
ssadek1976

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UNPREDICTABLE_GAS_LIMIT when calling estimateGas function

#typescript #node

Hello,

When I issue npx ts-node .ts and attempt to call out estimateGas function on sushiswap router as shown in below code snippet it triggers UNPREDICTABLE_GAS_LIMIT error (see below output error log #1).

`const gasLimit = await sushiEthDai.estimateGas.swap(
            !shouldStartEth ? DAI_TRADE : 0,
            shouldStartEth ? ETH_TRADE : 0,
            flashLoanerAddress,
            ethers.utils.toUtf8Bytes('1')
          );`
Enter fullscreen mode Exit fullscreen mode

Output Error Log #1
Error: cannot estimate gas; transaction may fail or may require manual gas limit See: https://links.ethers.org/v5-errors-UNPREDICTABLE_GAS_LIMIT
at Logger.makeError (C:\Samuel\Blockchain\Flashloan-arbitrage-bot-uniswap-v2\node_modules\@ethersproject\logger\src.ts\index.ts:269:28)
at Logger.throwError (C:\Samuel\Blockchain\Flashloan-arbitrage-bot-uniswap-v2\node_modules\@ethersproject\logger\src.ts\index.ts:281:20)
at checkError (C:\Samuel\Blockchain\Flashloan-arbitrage-bot-uniswap-v2\node_modules\@ethersproject\providers\src.ts\json-rpc-provider.ts:78:20)
at JsonRpcProvider. (C:\Samuel\Blockchain\Flashloan-arbitrage-bot-uniswap-v2\node_modules\@ethersproject\providers\src.ts\json-rpc-provider.ts:642:20)
at step (C:\Samuel\Blockchain\Flashloan-arbitrage-bot-uniswap-v2\node_modules\@ethersproject\providers\lib\json-rpc-provider.js:48:23)
at Object.throw (C:\Samuel\Blockchain\Flashloan-arbitrage-bot-uniswap-v2\node_modules\@ethersproject\providers\lib\json-rpc-provider.js:29:53)
at rejected (C:\Samuel\Blockchain\Flashloan-arbitrage-bot-uniswap-v2\node_modules\@ethersproject\providers\lib\json-rpc-provider.js:21:65)
at processTicksAndRejections (node:internal/process/task_queues:96:5) {
reason: 'execution reverted',
code: 'UNPREDICTABLE_GAS_LIMIT',
method: 'estimateGas',
transaction: {
from: 'xxxxxxxxxxxxxxxxxxxxxxxxxx',
to: '0xC3D03e4F041Fd4cD388c549Ee2A29a9E5075882f',
data: '0x022c0d9f0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000a000000000000000000000000a7564f968608ad09236b794836f93a5b76dfd53d000000000000000000000000000000000000000000000000000000000000008000000000000000000000000000000000000000000000000000000000000000013100000000000000000000000000000000000000000000000000000000000000',
accessList: null
},
error: Error: processing response error (body="{\"jsonrpc\":\"2.0\",\"id\":56,\"error\":{\"code\":-32000,\"message\":\"execution reverted\"}}", error={"code":-32000}, requestBody="{\"method\":\"eth_estimateGas\",\"params\":[{\"from\":\"0x825c5e7d385f9f07e2312154b0cf3cdd06396869\",\"to\":\"0xc3d03e4f041fd4cd388c549ee2a29a9e5075882f\",\"data\":\"0x022c0d9f0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000a000000000000000000000000a7564f968608ad09236b794836f93a5b76dfd53d000000000000000000000000000000000000000000000000000000000000008000000000000000000000000000000000000000000000000000000000000000013100000000000000000000000000000000000000000000000000000000000000\"}],\"id\":56,\"jsonrpc\":\"2.0\"}", requestMethod="POST", url="https://mainnet.infura.io/v3/xxxxxxxxxxxxxxxx", code=SERVER_ERROR, version=web/5.7.1)
at Logger.makeError (C:\Samuel\Blockchain\Flashloan-arbitrage-bot-uniswap-v2\node_modules\@ethersproject\logger\src.ts\index.ts:269:28)
at Logger.throwError (C:\Samuel\Blockchain\Flashloan-arbitrage-bot-uniswap-v2\node_modules\@ethersproject\logger\src.ts\index.ts:281:20)
at C:\Samuel\Blockchain\Flashloan-arbitrage-bot-uniswap-v2\node_modules\@ethersproject\web\src.ts\index.ts:341:28
at step (C:\Samuel\Blockchain\Flashloan-arbitrage-bot-uniswap-v2\node_modules\@ethersproject\web\lib\index.js:33:23)

at Object.next (C:\Samuel\Blockchain\Flashloan-arbitrage-bot-uniswap-v2\node_modules\@ethersproject\web\lib\index.js:14:53)
at fulfilled (C:\Samuel\Blockchain\Flashloan-arbitrage-bot-uniswap-v2\node_modules\@ethersproject\web\lib\index.js:5:58)

at processTicksAndRejections (node:internal/process/task_queues:96:5) {
reason: 'processing response error',
code: 'SERVER_ERROR',
body: '{"jsonrpc":"2.0","id":56,"error":{"code":-32000,"message":"execution reverted"}}',
error: Error: execution reverted
at getResult (C:\Samuel\Blockchain\Flashloan-arbitrage-bot-uniswap-v2\node_modules\@ethersproject\providers\src.ts\json-rpc-provider.ts:142:28)
at processJsonFunc (C:\Samuel\Blockchain\Flashloan-arbitrage-bot-uniswap-v2\node_modules\@ethersproject\web\src.ts\index.ts:383:22)
at C:\Samuel\Blockchain\Flashloan-arbitrage-bot-uniswap-v2\node_modules\@ethersproject\web\src.ts\index.ts:320:42

at step (C:\Samuel\Blockchain\Flashloan-arbitrage-bot-uniswap-v2\node_modules\@ethersproject\web\lib\index.js:33:23)

at Object.next (C:\Samuel\Blockchain\Flashloan-arbitrage-bot-uniswap-v2\node_modules\@ethersproject\web\lib\index.js:14:53)
at fulfilled (C:\Samuel\Blockchain\Flashloan-arbitrage-bot-uniswap-v2\node_modules\@ethersproject\web\lib\index.js:5:58)
at processTicksAndRejections (node:internal/process/task_queues:96:5) {
code: -32000,
data: undefined
},
requestBody: '{"method":"eth_estimateGas","params":[{"from":"xxxxxxxxxxxxxxxxxxxxxxxx","to":"0xc3d03e4f041fd4cd388c549ee2a29a9e5075882f","data":"0x022c0d9f0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000a000000000000000000000000a7564f968608ad09236b794836f93a5b76dfd53d000000000000000000000000000000000000000000000000000000000000008000000000000000000000000000000000000000000000000000000000000000013100000000000000000000000000000000000000000000000000000000000000"}],"id":56,"jsonrpc":"2.0"}',
requestMethod: 'POST',
url: 'https://mainnet.infura.io/v3/xxxxxxxxxxxxxxxxxxxxx'
}
}

I also tried overriding the gas limit when passing it as a parameter into the same function shown below but it returns this time a slightly different error Error: cannot override "gas" (see below output error log #2).

`const gasLimit = await sushiEthDai.estimateGas.swap(
            !shouldStartEth ? DAI_TRADE : 0,
            shouldStartEth ? ETH_TRADE : 0,
            flashLoanerAddress,
            ethers.utils.toUtf8Bytes('1'), {
                gas: 6721975
            }
          );`
Enter fullscreen mode Exit fullscreen mode

Output Error Log #2
Error: cannot estimate gas; transaction may fail or may require manual gas limit See: https://links.ethers.org/v5-errors-UNPREDICTABLE_GAS_LIMIT
at Logger.makeError (C:\Samuel\Blockchain\Flashloan-arbitrage-bot-uniswap-v2\node_modules\@ethersproject\logger\src.ts\index.ts:269:28)
at Logger.throwError (C:\Samuel\Blockchain\Flashloan-arbitrage-bot-uniswap-v2\node_modules\@ethersproject\logger\src.ts\index.ts:281:20)
at checkError (C:\Samuel\Blockchain\Flashloan-arbitrage-bot-uniswap-v2\node_modules\@ethersproject\providers\src.ts\json-rpc-provider.ts:78:20)
at JsonRpcProvider. (C:\Samuel\Blockchain\Flashloan-arbitrage-bot-uniswap-v2\node_modules\@ethersproject\providers\src.ts\json-rpc-provider.ts:642:20)
at step (C:\Samuel\Blockchain\Flashloan-arbitrage-bot-uniswap-v2\node_modules\@ethersproject\providers\lib\json-rpc-provider.js:48:23)
at Object.throw (C:\Samuel\Blockchain\Flashloan-arbitrage-bot-uniswap-v2\node_modules\@ethersproject\providers\lib\json-rpc-provider.js:29:53)
at rejected (C:\Samuel\Blockchain\Flashloan-arbitrage-bot-uniswap-v2\node_modules\@ethersproject\providers\lib\json-rpc-provider.js:21:65)
at processTicksAndRejections (node:internal/process/task_queues:96:5) {
reason: 'execution reverted',
code: 'UNPREDICTABLE_GAS_LIMIT',
method: 'estimateGas',
transaction: {
from: 'xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx',
to: '0xC3D03e4F041Fd4cD388c549Ee2A29a9E5075882f',
data: '0x022c0d9f0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000a000000000000000000000000a7564f968608ad09236b794836f93a5b76dfd53d000000000000000000000000000000000000000000000000000000000000008000000000000000000000000000000000000000000000000000000000000000013100000000000000000000000000000000000000000000000000000000000000',
accessList: null
},
error: Error: processing response error (body="{\"jsonrpc\":\"2.0\",\"id\":56,\"error\":{\"code\":-32000,\"message\":\"execution reverted\"}}", error={"code":-32000}, requestBody="{\"method\":\"eth_estimateGas\",\"params\":[{\"from\":\"xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx\",\"to\":\"0xc3d03e4f041fd4cd388c549ee2a29a9e5075882f\",\"data\":\"0x022c0d9f0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000a000000000000000000000000a7564f968608ad09236b794836f93a5b76dfd53d000000000000000000000000000000000000000000000000000000000000008000000000000000000000000000000000000000000000000000000000000000013100000000000000000000000000000000000000000000000000000000000000\"}],\"id\":56,\"jsonrpc\":\"2.0\"}", requestMethod="POST", url="https://mainnet.infura.io/v3/xxxxxxxxxxxxxxxxxxxxxxxxxxxxx", code=SERVER_ERROR, version=web/5.7.1)
at Logger.makeError (C:\Samuel\Blockchain\Flashloan-arbitrage-bot-uniswap-v2\node_modules\@ethersproject\logger\src.ts\index.ts:269:28)
at Logger.throwError (C:\Samuel\Blockchain\Flashloan-arbitrage-bot-uniswap-v2\node_modules\@ethersproject\logger\src.ts\index.ts:281:20)
at C:\Samuel\Blockchain\Flashloan-arbitrage-bot-uniswap-v2\node_modules\@ethersproject\web\src.ts\index.ts:341:28
at step (C:\Samuel\Blockchain\Flashloan-arbitrage-bot-uniswap-v2\node_modules\@ethersproject\web\lib\index.js:33:23)

at Object.next (C:\Samuel\Blockchain\Flashloan-arbitrage-bot-uniswap-v2\node_modules\@ethersproject\web\lib\index.js:14:53)
at fulfilled (C:\Samuel\Blockchain\Flashloan-arbitrage-bot-uniswap-v2\node_modules\@ethersproject\web\lib\index.js:5:58)

at processTicksAndRejections (node:internal/process/task_queues:96:5) {
reason: 'processing response error',
code: 'SERVER_ERROR',
body: '{"jsonrpc":"2.0","id":56,"error":{"code":-32000,"message":"execution reverted"}}',
error: Error: execution reverted
at getResult (C:\Samuel\Blockchain\Flashloan-arbitrage-bot-uniswap-v2\node_modules\@ethersproject\providers\src.ts\json-rpc-provider.ts:142:28)
at processJsonFunc (C:\Samuel\Blockchain\Flashloan-arbitrage-bot-uniswap-v2\node_modules\@ethersproject\web\src.ts\index.ts:383:22)
at C:\Samuel\Blockchain\Flashloan-arbitrage-bot-uniswap-v2\node_modules\@ethersproject\web\src.ts\index.ts:320:42

at step (C:\Samuel\Blockchain\Flashloan-arbitrage-bot-uniswap-v2\node_modules\@ethersproject\web\lib\index.js:33:23)

at Object.next (C:\Samuel\Blockchain\Flashloan-arbitrage-bot-uniswap-v2\node_modules\@ethersproject\web\lib\index.js:14:53)
at fulfilled (C:\Samuel\Blockchain\Flashloan-arbitrage-bot-uniswap-v2\node_modules\@ethersproject\web\lib\index.js:5:58)
at processTicksAndRejections (node:internal/process/task_queues:96:5) {
code: -32000,
data: undefined
},
requestBody: '{"method":"eth_estimateGas","params":[{"from":"xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx","to":"0xc3d03e4f041fd4cd388c549ee2a29a9e5075882f","data":"0x022c0d9f0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000a000000000000000000000000a7564f968608ad09236b794836f93a5b76dfd53d000000000000000000000000000000000000000000000000000000000000008000000000000000000000000000000000000000000000000000000000000000013100000000000000000000000000000000000000000000000000000000000000"}],"id":56,"jsonrpc":"2.0"}',
requestMethod: 'POST',
url: 'https://mainnet.infura.io/v3/xxxxxxxxxxxxxxxxxxxxxxxxxx'
}
}
Error: cannot override "gas" (operation="overrides", overrides=["gas"], code=UNSUPPORTED_OPERATION, version=contracts/5.7.0)
at Logger.makeError (C:\Samuel\Blockchain\Flashloan-arbitrage-bot-uniswap-v2\node_modules\@ethersproject\logger\src.ts\index.ts:269:28)
at Logger.throwError (C:\Samuel\Blockchain\Flashloan-arbitrage-bot-uniswap-v2\node_modules\@ethersproject\logger\src.ts\index.ts:281:20)
at C:\Samuel\Blockchain\Flashloan-arbitrage-bot-uniswap-v2\node_modules\@ethersproject\contracts\src.ts\index.ts:304:16

at step (C:\Samuel\Blockchain\Flashloan-arbitrage-bot-uniswap-v2\node_modules\@ethersproject\contracts\lib\index.js:48:23)

at Object.next (C:\Samuel\Blockchain\Flashloan-arbitrage-bot-uniswap-v2\node_modules\@ethersproject\contracts\lib\index.js:29:53)
at fulfilled (C:\Samuel\Blockchain\Flashloan-arbitrage-bot-uniswap-v2\node_modules\@ethersproject\contracts\lib\index.js:20:58)
at processTicksAndRejections (node:internal/process/task_queues:96:5) {
reason: 'cannot override "gas"',
code: 'UNSUPPORTED_OPERATION',
operation: 'overrides',
overrides: [ 'gas' ]
}

Not sure if tsnode accepts command line options for setting gas limits or directly within tsconfig.json. This last case, I have consulted the tsconfig docs but it says nothing or no mention about gas limits. So I´m stuck here.

Any help would be greatly appreciated.

Thank you,
Samuel

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