Error: Cannot find module 'create-hash'

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I use the SDK as normal.
I oz compile.
Then sometimes suddenly my console errors when I want to use oz commands.
I got rid of the problem by deleting my node_modules folder and npm reinstalling them. The oz commands then worked as they should for some time.
But then the error Cannot find module 'create-hash' reappeared. It is hard to reason about any steps that might have led up to this error. I did not delete or install anything new into the project folder in the interim.

This must have something to do with the node_modules/ directory though, as every time I delete it and npm install the error goes away.

I should also mention that at certain times I had a oz session configured - maybe something happened due to that.

:computer: Environment
@openzeppelin/cli@2.5.3

image
image.jpg866×458 120 KB

nothing else

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2

Hi @gitpusha,

Looking at your packages installed, you currently have @openzeppelin/contracts rather than @openzeppelin/contracts-ethereum-package:

https://docs.openzeppelin.com/sdk/2.5/linking
Make sure you install @openzeppelin/contracts-ethereum-package and not the vanilla @openzeppelin/contracts . The latter is set up for general usage, while @openzeppelin/contracts-ethereum-package is tailored for being used with the OpenZeppelin SDK. This means that its contracts are already set up to be upgradeable.

Though use version 2.2.3 due to https://github.com/OpenZeppelin/openzeppelin-contracts-ethereum-package/issues/70

oz link @openzeppelin/contracts-ethereum-package@2.2.3

Other than the above, there is nothing that I am aware of which would cause the issue you are seeing.

I have tried recreating but haven't been able to reproduce unfortunately (using Windows Subsystem for Linux).

$ npm list --depth=0
deep@1.0.0 /mnt/c/Users/andre/Documents/projects/forum/deep
├── @openzeppelin/contracts@2.3.0
├── @openzeppelin/upgrades@2.5.3
├── @truffle/hdwallet-provider@1.0.22
└── dotenv@8.2.0

$ npm list create-hash
deep@1.0.0 /mnt/c/Users/andre/Documents/projects/forum/deep
├─┬ @openzeppelin/upgrades@2.5.3
│ └─┬ web3@1.2.1
│   └─┬ web3-eth@1.2.1
│     └─┬ web3-eth-accounts@1.2.1
│       └─┬ crypto-browserify@3.12.0
│         ├─┬ browserify-sign@4.0.4
│         │ ├── create-hash@1.2.0  deduped
│         │ └─┬ parse-asn1@5.1.5
│         │   └── create-hash@1.2.0  deduped
│         ├── create-hash@1.2.0  deduped
│         └─┬ public-encrypt@4.0.3
│           └── create-hash@1.2.0  deduped
└─┬ @truffle/hdwallet-provider@1.0.22
  ├─┬ bip39@2.6.0
  │ ├── create-hash@1.2.0
  │ └─┬ pbkdf2@3.0.17
  │   ├── create-hash@1.2.0  deduped
  │   └─┬ create-hmac@1.1.7
  │     └── create-hash@1.2.0  deduped
  ├─┬ ethereumjs-tx@1.3.7
  │ └─┬ ethereumjs-util@5.2.0
  │   └── create-hash@1.2.0  deduped
  ├─┬ ethereumjs-util@6.1.0
  │ ├── create-hash@1.2.0  deduped
  │ └─┬ secp256k1@3.7.1
  │   ├── create-hash@1.2.0  deduped
  │   └─┬ drbg.js@1.0.1
  │     ├─┬ browserify-aes@1.2.0
  │     │ └── create-hash@1.2.0  deduped
  │     └── create-hash@1.2.0  deduped
  ├─┬ ethereumjs-wallet@0.6.3
  │ ├─┬ bs58check@2.1.2
  │ │ └── create-hash@1.2.0  deduped
  │ └─┬ hdkey@1.1.1
  │   └─┬ coinstring@2.3.0
  │     └── create-hash@1.2.0  deduped
  └─┬ web3-provider-engine@14.0.6 (git+https://github.com/trufflesuite/provider-engine.git#3538c60bc4836b73ccae1ac3f64c8fed8ef19c1a)
    ├─┬ eth-block-tracker@3.0.1
    │ └─┬ ethereumjs-util@5.2.0
    │   └── create-hash@1.2.0  deduped
    ├─┬ eth-json-rpc-infura@3.2.1
    │ └─┬ eth-json-rpc-middleware@1.6.0
    │   ├─┬ eth-tx-summary@3.2.4
    │   │ └─┬ ethereumjs-util@5.2.0
    │   │   └── create-hash@1.2.0  deduped
    │   └─┬ ethereumjs-util@5.2.0
    │     └── create-hash@1.2.0  deduped
    ├─┬ eth-sig-util@1.4.2
    │ └─┬ ethereumjs-util@5.2.0
    │   └── create-hash@1.2.0  deduped
    ├─┬ ethereumjs-block@1.7.1
    │ ├─┬ ethereumjs-util@5.2.0
    │ │ └── create-hash@1.2.0  deduped
    │ └─┬ merkle-patricia-tree@2.3.2
    │   └─┬ ethereumjs-util@5.2.0
    │     └── create-hash@1.2.0  deduped
    ├─┬ ethereumjs-util@5.2.0
    │ └── create-hash@1.2.0  deduped
    └─┬ ethereumjs-vm@2.6.0
      ├─┬ ethereumjs-account@2.0.5
      │ └─┬ ethereumjs-util@5.2.0
      │   └── create-hash@1.2.0  deduped
      └─┬ ethereumjs-block@2.2.0
        └─┬ ethereumjs-util@5.2.0
          └── create-hash@1.2.0  deduped
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3

Thanks for trying your best. I swapped my @openzeppelin/contracts for the @openzeppelin/contracts-ethereum-package@2.2.3, as per your advice.

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