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Is there a way to get this to work? Cascading errors: web3.eth.Contract is not a constructor // TypeError: Cannot read properties of undefined (reading 'toWei') #40

Open noob1ing opened 2 years ago

noob1ing commented 2 years ago

When I try to npm run start this code I get this error:

TypeError: web3.eth.Contract is not a constructor at Object. (C:\Users\John\demos\DAAP university\TAKE 2\price-bot\index.js:31:27) at Module._compile (node:internal/modules/cjs/loader:1105:14) at Object.Module._extensions..js (node:internal/modules/cjs/loader:1159:10) at Module.load (node:internal/modules/cjs/loader:981:32) at Function.Module._load (node:internal/modules/cjs/loader:822:12) at Function.executeUserEntryPoint [as runMain] (node:internal/modules/run_main:77:12) at node:internal/main/run_main_module:17:47

If I change the constructor format from _const uniswapFactoryContract = new web3.eth.Contract(UNISWAP_FACTORY_ABI, UNISWAP_FACTORYADDRESS) to const uniswapFactoryContract = web3.eth.contract(UNISWAP_FACTORY_ABI, UNISWAP_FACTORY_ADDRESS)

then I get this error TypeError: Cannot read properties of undefined (reading 'toWei') at monitorPrice (C:\Users\John\demos\DAAP university\TAKE 2\price-bot\index.js:73:31) at Timeout._onTimeout (C:\Users\John\demos\DAAP university\TAKE 2\price-bot\index.js:112:48) at listOnTimeout (node:internal/timers:559:17) at processTimers (node:internal/timers:502:7)

is this tutorial dead or is there a way to make this code run?

CibolinCode commented 2 years ago

I worked on it for a while and I think it's dead for now because they deleted the command request from web3 so therefore the basis of the entire search engine doesn't work because it can no longer use the command request

On Wed, Jun 8, 2022, 8:16 PM noob1ing @.***> wrote:

When I try to npm run start this code I get this error:

TypeError: web3.eth.Contract is not a constructor at Object. (C:\Users\John\demos\DAAP university\TAKE 2\price-bot\index.js:31:27) at Module._compile (node:internal/modules/cjs/loader:1105:14) at Object.Module._extensions..js (node:internal/modules/cjs/loader:1159:10) at Module.load (node:internal/modules/cjs/loader:981:32) at Function.Module._load (node:internal/modules/cjs/loader:822:12) at Function.executeUserEntryPoint [as runMain] (node:internal/modules/run_main:77:12) at node:internal/main/run_main_module:17:47

If I change the constructor format from const uniswapFactoryContract = new web3.eth.Contract(UNISWAP_FACTORY_ABI, UNISWAP_FACTORY_ADDRESS) to const uniswapFactoryContract = web3.eth.contract(UNISWAP_FACTORY_ABI, UNISWAP_FACTORY_ADDRESS)

then I get this error TypeError: Cannot read properties of undefined (reading 'toWei') at monitorPrice (C:\Users\John\demos\DAAP university\TAKE 2\price-bot\index.js:73:31) at Timeout._onTimeout (C:\Users\John\demos\DAAP university\TAKE 2\price-bot\index.js:112:48) at listOnTimeout (node:internal/timers:559:17) at processTimers (node:internal/timers:502:7)

is this tutorial dead or is there a way to make this code run?

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noob1ing commented 2 years ago

Thanks for your help

OpeOginni commented 1 year ago

For this Error: TypeError: Cannot read properties of undefined (reading 'toWei')

Change all occurrences of web3.utils.toWei To web3.toWei

BernardTeske commented 1 year ago

I got it to work with this: https://web3js.readthedocs.io/en/v1.8.2/web3-eth-contract.html#eth-contract

  1. npm install web3-eth-contract
  2. add Contract.setProvider(process.env.RPC_URL); after Line const web3 = new Web3(process.env.RPC_URL)
  3. change every new web3.eth.Contract( to new Contract(