| Name | w3off JSON |
| Version |
0.2.0
JSON |
| download |
| home_page | None |
| Summary | Collection of CLI utilities for secure offline blockchain transaction creation and signing |
| upload_time | 2025-02-22 20:27:11 |
| maintainer | None |
| docs_url | None |
| author | None |
| requires_python | >=3.12 |
| license | Apache License
Version 2.0, January 2004
http://www.apache.org/licenses/
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| keywords |
web3
offline-wallet
ethereum
evm
crypto
blockchain
smart-contracts
|
| VCS |
 |
| bugtrack_url |
|
| requirements |
web3
eth-tester
py-evm
PyYAML
|
| Travis-CI |
No Travis.
|
| coveralls test coverage |
No coveralls.
|
[](https://github.com/roman-spiridonov/w3off/actions/workflows/build-and-test.yml)
**`w3off`** (**W**eb3 **Off**line) is a collection of CLI utilities for offline wallet management. The intended use case is creation and signing of transactions offline.
Currently supports only `EVM` networks. Default configurations are specified for the following networks, but you can easily add more in [`chains.yaml`](w3off/chains.yaml):
* Ethereum (MainNet)
* Ethereum Sepolia (TestNet)
* Base
* Arbitrum
* Binance (BnB) SmartChain
* Optimism (OP MainNet)
* Avalanche
**This is not a wallet!** The intention is for you to manage your own keys. `w3off` just provides utilities for you to be able to explore the blockchain and create (presumably, complex) transactions using your offline (cold) keys, stored elsewhere and never used while you are online.
# Motivation
The project is spurred by the fact that vast majority of typical web3 wallets are *hot wallets* in a form of browser extension or mobile app. By design, any hot wallet would have to store the private key in memory and on disk (e.g. for cross-session state keeping and uninterrupted experience between the user sessions). Albeit encrypted, coupled with the fact that hot wallet is always online while browsing and using your device, it exposes you to additional attack vectors.
In general, hot wallets are often focused on improving Web3 browsing experience, so although security is critical some reasonable compromises are being made.
If your goal is **low** number of transactions with **increased security** for larger amount of funds, having an offline wallet and the transactions constructed offline is a preference.
# Alternative solutions
**1. Hardware wallets**
Although highly recommended, hardware wallets can also be exposed to additional attack vectors, such as a *supply-chain attacks*. For example, you may be located in the region where sourcing directly from producer is not possible. Additional layer of software employed by hardware wallets also slightly increases the attack surface. Ultimately, you do not control the hardware of the wallet, and you have to trust the manufacturer and the supply chain.
**2. Offline wallet alternatives**
There are some web3 wallets which provide support for offline transactions (e.g. using *software wallets*), such as:
*2.1) MEW* - Great for simple fund movements (ETH or ERC20 tokens), but if you want to construct a more complex transaction, such as staking your USDT for additional yield, or other smart contract interactions, this functionality is not supported. However, MEW's *"send offline" helper* is helpful and you can use it to broadcast signed transactions created with help of `w3off` utilities (specifically, `observer` and `signer`).\
*2.2) MyCrypto* - Unfortunately, this project is no longer supported and ceased to work.\
*2.3) AirGap* - The flow requires a mobile device.\
*2.4) Cast* (part of *Foundry*) - provides a lot of CLI utilities, but the primary use case is testing web3 applications.
How is `w3off` different?
- Guarantees offline signing
- CLI interphase
- Open-source
- Supports any EVM chains
- Supports any Smart Contract transactions (think lending, pooling, staking, exchanging your tokens and redeeming them for additional yield)
- Developed with security in mind
# High-Level Architecture
The solution consists of three modules, intended to be run one after the other:
1. `Observer`: Helps conveniently build the transaction (no key used)
2. `Signer`: Signs the transaction offline using your securely stored cold and encrypted keystore
3. `Sender`: Sends the signed (raw) transaction(s) (no key used)
<img src='w3off_diagrams.png' width="830px" alt="Observer -> Signer -> Sender"/>
# Configuration
You can configure the tool for your own use by following this sequence:
1) Configure chains and RPC providers in [`w3off/chains.yaml`](w3off/chains.yaml).
2) [Optional] Configure default values or preferences in [`w3off/config.py`](w3off/config.py).
3) The application aims to cache web requests to `w3off/cache.json` persistently (mostly, contract ABIs or bytecodes). Since this data rarely chages on the network, the cache is never invalidated by the utilities. Clean the cache manually as needed by removing this file, e.g. if you suspect smart contract info in it may be outdated.
If you are installing the `w3off` package with `pip`, you can put your settings to `~/.w3off` folder, i.e. `~/.w3off/chains.yaml`. In this case, this folder will be used for both settings and cache instead.
# Usage
Download the source code and execute the following in CLI to launch the tool in interactive mode. It will always prompt you before proceeding to next step so don't worry.
Prerequisite: `pip install` or `conda install` if needed.
At this point, there is no support for CLI parameters (only interactive mode).
Ensure tests pass before using on your side:
```
$ python -m unittest discover
```
Simple launch:
```
$ python -m w3off
```
Or launch one by one:
```
$ python -m observer
$ python -m signer
$ python -m sender
```
You can also do this:
```
# sign and send using transcation JSON from file
$ python -m signer < yourTx.json
$ python -m sender < rawTx.json
```
Or this:
```
# send raw transaction passed as a string
$ echo "0x..." | python -m sender
```
Alternatively, you can install the executable scripts via `pip`:
```
$ pip install w3off
$ w3off
$ w3observer
$ w3signer
$ w3sender
```
<!-- Deprecated:
```
$ w3off dataFromCall transfer(address,uint256) 0x5AD1F1Aa106B5Af3A4F9D8B095427Df95607a452 2002220000
``` -->
Raw data
{
"_id": null,
"home_page": null,
"name": "w3off",
"maintainer": null,
"docs_url": null,
"requires_python": ">=3.12",
"maintainer_email": null,
"keywords": "web3, offline-wallet, ethereum, evm, crypto, blockchain, smart-contracts",
"author": null,
"author_email": null,
"download_url": "https://files.pythonhosted.org/packages/b7/95/bb8fbb872be67968beb43e3e888c3841fb855e7033cdb91504e58a3ef8e5/w3off-0.2.0.tar.gz",
"platform": null,
"description": "[](https://github.com/roman-spiridonov/w3off/actions/workflows/build-and-test.yml)\n\n**`w3off`** (**W**eb3 **Off**line) is a collection of CLI utilities for offline wallet management. The intended use case is creation and signing of transactions offline.\n\nCurrently supports only `EVM` networks. Default configurations are specified for the following networks, but you can easily add more in [`chains.yaml`](w3off/chains.yaml):\n* Ethereum (MainNet)\n* Ethereum Sepolia (TestNet)\n* Base \n* Arbitrum\n* Binance (BnB) SmartChain\n* Optimism (OP MainNet)\n* Avalanche\n\n**This is not a wallet!** The intention is for you to manage your own keys. `w3off` just provides utilities for you to be able to explore the blockchain and create (presumably, complex) transactions using your offline (cold) keys, stored elsewhere and never used while you are online. \n\n# Motivation\nThe project is spurred by the fact that vast majority of typical web3 wallets are *hot wallets* in a form of browser extension or mobile app. By design, any hot wallet would have to store the private key in memory and on disk (e.g. for cross-session state keeping and uninterrupted experience between the user sessions). Albeit encrypted, coupled with the fact that hot wallet is always online while browsing and using your device, it exposes you to additional attack vectors. \n\nIn general, hot wallets are often focused on improving Web3 browsing experience, so although security is critical some reasonable compromises are being made.\n\nIf your goal is **low** number of transactions with **increased security** for larger amount of funds, having an offline wallet and the transactions constructed offline is a preference.\n\n# Alternative solutions\n**1. Hardware wallets**\nAlthough highly recommended, hardware wallets can also be exposed to additional attack vectors, such as a *supply-chain attacks*. For example, you may be located in the region where sourcing directly from producer is not possible. Additional layer of software employed by hardware wallets also slightly increases the attack surface. Ultimately, you do not control the hardware of the wallet, and you have to trust the manufacturer and the supply chain. \n\n**2. Offline wallet alternatives**\nThere are some web3 wallets which provide support for offline transactions (e.g. using *software wallets*), such as:\n\n*2.1) MEW* - Great for simple fund movements (ETH or ERC20 tokens), but if you want to construct a more complex transaction, such as staking your USDT for additional yield, or other smart contract interactions, this functionality is not supported. However, MEW's *\"send offline\" helper* is helpful and you can use it to broadcast signed transactions created with help of `w3off` utilities (specifically, `observer` and `signer`).\\\n*2.2) MyCrypto* - Unfortunately, this project is no longer supported and ceased to work.\\\n*2.3) AirGap* - The flow requires a mobile device.\\\n*2.4) Cast* (part of *Foundry*) - provides a lot of CLI utilities, but the primary use case is testing web3 applications.\n\nHow is `w3off` different?\n- Guarantees offline signing\n- CLI interphase\n- Open-source\n- Supports any EVM chains\n- Supports any Smart Contract transactions (think lending, pooling, staking, exchanging your tokens and redeeming them for additional yield)\n- Developed with security in mind\n\n# High-Level Architecture\n\nThe solution consists of three modules, intended to be run one after the other:\n1. `Observer`: Helps conveniently build the transaction (no key used)\n2. `Signer`: Signs the transaction offline using your securely stored cold and encrypted keystore\n3. `Sender`: Sends the signed (raw) transaction(s) (no key used)\n\n<img src='w3off_diagrams.png' width=\"830px\" alt=\"Observer -> Signer -> Sender\"/>\n\n# Configuration\nYou can configure the tool for your own use by following this sequence:\n1) Configure chains and RPC providers in [`w3off/chains.yaml`](w3off/chains.yaml).\n2) [Optional] Configure default values or preferences in [`w3off/config.py`](w3off/config.py).\n3) The application aims to cache web requests to `w3off/cache.json` persistently (mostly, contract ABIs or bytecodes). Since this data rarely chages on the network, the cache is never invalidated by the utilities. Clean the cache manually as needed by removing this file, e.g. if you suspect smart contract info in it may be outdated.\n\nIf you are installing the `w3off` package with `pip`, you can put your settings to `~/.w3off` folder, i.e. `~/.w3off/chains.yaml`. In this case, this folder will be used for both settings and cache instead.\n\n# Usage\nDownload the source code and execute the following in CLI to launch the tool in interactive mode. It will always prompt you before proceeding to next step so don't worry.\nPrerequisite: `pip install` or `conda install` if needed.\n\nAt this point, there is no support for CLI parameters (only interactive mode).\n\nEnsure tests pass before using on your side:\n```\n$ python -m unittest discover\n```\n\nSimple launch:\n```\n$ python -m w3off\n```\n\nOr launch one by one:\n```\n$ python -m observer\n$ python -m signer\n$ python -m sender\n```\n\nYou can also do this:\n```\n# sign and send using transcation JSON from file\n$ python -m signer < yourTx.json\n$ python -m sender < rawTx.json\n```\n\nOr this:\n```\n# send raw transaction passed as a string\n$ echo \"0x...\" | python -m sender \n```\n\n\nAlternatively, you can install the executable scripts via `pip`:\n```\n$ pip install w3off\n$ w3off\n$ w3observer\n$ w3signer\n$ w3sender\n```\n\n<!-- Deprecated:\n```\n$ w3off dataFromCall transfer(address,uint256) 0x5AD1F1Aa106B5Af3A4F9D8B095427Df95607a452 2002220000\n``` -->\n",
"bugtrack_url": null,
"license": "Apache License\n Version 2.0, January 2004\n http://www.apache.org/licenses/\n \n TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION\n \n 1. Definitions.\n \n \"License\" shall mean the terms and conditions for use, reproduction,\n and distribution as defined by Sections 1 through 9 of this document.\n \n \"Licensor\" shall mean the copyright owner or entity authorized by\n the copyright owner that is granting the License.\n \n \"Legal Entity\" shall mean the union of the acting entity and all\n other entities that control, are controlled by, or are under common\n control with that entity. For the purposes of this definition,\n \"control\" means (i) the power, direct or indirect, to cause the\n direction or management of such entity, whether by contract or\n otherwise, or (ii) ownership of fifty percent (50%) or more of the\n outstanding shares, or (iii) beneficial ownership of such entity.\n \n \"You\" (or \"Your\") shall mean an individual or Legal Entity\n exercising permissions granted by this License.\n \n \"Source\" form shall mean the preferred form for making modifications,\n including but not limited to software source code, documentation\n source, and configuration files.\n \n \"Object\" form shall mean any form resulting from mechanical\n transformation or translation of a Source form, including but\n not limited to compiled object code, generated documentation,\n and conversions to other media types.\n \n \"Work\" shall mean the work of authorship, whether in Source or\n Object form, made available under the License, as indicated by a\n copyright notice that is included in or attached to the work\n (an example is provided in the Appendix below).\n \n \"Derivative Works\" shall mean any work, whether in Source or Object\n form, that is based on (or derived from) the Work and for which the\n editorial revisions, annotations, elaborations, or other modifications\n represent, as a whole, an original work of authorship. For the purposes\n of this License, Derivative Works shall not include works that remain\n separable from, or merely link (or bind by name) to the interfaces of,\n the Work and Derivative Works thereof.\n \n \"Contribution\" shall mean any work of authorship, including\n the original version of the Work and any modifications or additions\n to that Work or Derivative Works thereof, that is intentionally\n submitted to Licensor for inclusion in the Work by the copyright owner\n or by an individual or Legal Entity authorized to submit on behalf of\n the copyright owner. For the purposes of this definition, \"submitted\"\n means any form of electronic, verbal, or written communication sent\n to the Licensor or its representatives, including but not limited to\n communication on electronic mailing lists, source code control systems,\n and issue tracking systems that are managed by, or on behalf of, the\n Licensor for the purpose of discussing and improving the Work, but\n excluding communication that is conspicuously marked or otherwise\n designated in writing by the copyright owner as \"Not a Contribution.\"\n \n \"Contributor\" shall mean Licensor and any individual or Legal Entity\n on behalf of whom a Contribution has been received by Licensor and\n subsequently incorporated within the Work.\n \n 2. Grant of Copyright License. Subject to the terms and conditions of\n this License, each Contributor hereby grants to You a perpetual,\n worldwide, non-exclusive, no-charge, royalty-free, irrevocable\n copyright license to reproduce, prepare Derivative Works of,\n publicly display, publicly perform, sublicense, and distribute the\n Work and such Derivative Works in Source or Object form.\n \n 3. Grant of Patent License. Subject to the terms and conditions of\n this License, each Contributor hereby grants to You a perpetual,\n worldwide, non-exclusive, no-charge, royalty-free, irrevocable\n (except as stated in this section) patent license to make, have made,\n use, offer to sell, sell, import, and otherwise transfer the Work,\n where such license applies only to those patent claims licensable\n by such Contributor that are necessarily infringed by their\n Contribution(s) alone or by combination of their Contribution(s)\n with the Work to which such Contribution(s) was submitted. If You\n institute patent litigation against any entity (including a\n cross-claim or counterclaim in a lawsuit) alleging that the Work\n or a Contribution incorporated within the Work constitutes direct\n or contributory patent infringement, then any patent licenses\n granted to You under this License for that Work shall terminate\n as of the date such litigation is filed.\n \n 4. Redistribution. You may reproduce and distribute copies of the\n Work or Derivative Works thereof in any medium, with or without\n modifications, and in Source or Object form, provided that You\n meet the following conditions:\n \n (a) You must give any other recipients of the Work or\n Derivative Works a copy of this License; and\n \n (b) You must cause any modified files to carry prominent notices\n stating that You changed the files; and\n \n (c) You must retain, in the Source form of any Derivative Works\n that You distribute, all copyright, patent, trademark, and\n attribution notices from the Source form of the Work,\n excluding those notices that do not pertain to any part of\n the Derivative Works; and\n \n (d) If the Work includes a \"NOTICE\" text file as part of its\n distribution, then any Derivative Works that You distribute must\n include a readable copy of the attribution notices contained\n within such NOTICE file, excluding those notices that do not\n pertain to any part of the Derivative Works, in at least one\n of the following places: within a NOTICE text file distributed\n as part of the Derivative Works; within the Source form or\n documentation, if provided along with the Derivative Works; or,\n within a display generated by the Derivative Works, if and\n wherever such third-party notices normally appear. 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Unless You explicitly state otherwise,\n any Contribution intentionally submitted for inclusion in the Work\n by You to the Licensor shall be under the terms and conditions of\n this License, without any additional terms or conditions.\n Notwithstanding the above, nothing herein shall supersede or modify\n the terms of any separate license agreement you may have executed\n with Licensor regarding such Contributions.\n \n 6. Trademarks. This License does not grant permission to use the trade\n names, trademarks, service marks, or product names of the Licensor,\n except as required for reasonable and customary use in describing the\n origin of the Work and reproducing the content of the NOTICE file.\n \n 7. Disclaimer of Warranty. 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