146 lines
4.8 KiB
Markdown
146 lines
4.8 KiB
Markdown
# ethereumjs-wallet
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[![NPM Package][npm-badge]][npm-link]
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[![Actions Status][actions-badge]][actions-link]
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[![Coverage Status][coverage-badge]][coverage-link]
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[![Discord][discord-badge]][discord-link]
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A lightweight wallet implementation. At the moment it supports key creation and conversion between various formats.
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It is complemented by the following packages:
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- [@ethereumjs/tx](https://github.com/ethereumjs/ethereumjs-monorepo/tree/master/packages/tx) to sign transactions
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- [ethereumjs-icap](https://github.com/ethereumjs/ethereumjs-icap) to manipulate ICAP addresses
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- [store.js](https://github.com/marcuswestin/store.js) to use browser storage
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Motivations are:
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- be lightweight
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- work in a browser
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- use a single, maintained version of crypto library (and that should be in line with [`ethereumjs-util`](https://github.com/ethereumjs/ethereumjs-monorepo/tree/master/packages/util) and `@ethereumjs/tx`)
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- support import/export between various wallet formats
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- support BIP32 HD keys
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Features not supported:
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- signing transactions
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- managing storage (neither in node.js or the browser)
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## Wallet API
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For information about the Wallet's API, please go to [./docs/classes/wallet.md](./docs/classes/wallet.md).
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You can import the `Wallet` class like this
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Node.js / ES5:
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```js
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const Wallet = require('ethereumjs-wallet').default
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```
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ESM / TypeScript:
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```js
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import Wallet from 'ethereumjs-wallet'
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```
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## Thirdparty API
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Importing various third party wallets is possible through the `thirdparty` submodule:
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Node.js / ES5:
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```js
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const { thirdparty } = require('ethereumjs-wallet')
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```
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ESM / TypeScript:
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```js
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import { thirdparty } from 'ethereumjs-wallet'
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```
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Please go to [./docs/README.md](./docs/README.md) for more info.
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## HD Wallet API
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To use BIP32 HD wallets, first include the `hdkey` submodule:
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Node.js / ES5:
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```js
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const { hdkey } = require('ethereumjs-wallet')
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```
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ESM / TypeScript:
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```js
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import { hdkey } from 'ethereumjs-wallet'
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```
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Please go to [./docs/classes/ethereumhdkey.md](./docs/classes/ethereumhdkey.md) for more info.
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## Provider Engine
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Provider Engine is
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[not very actively maintained](https://github.com/MetaMask/web3-provider-engine#web3-providerengine)
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and support has been removed along `v1.0.0` release, see
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issue [#115](https://github.com/ethereumjs/ethereumjs-wallet/issues/115) for context.
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You can use the the old `src/provider-engine.ts` code (see associated PR) as some boilerplate
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for your own integration if needed.
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## Remarks about `toV3`
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The `options` is an optional object hash, where all the serialization parameters can be fine tuned:
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- uuid - UUID. One is randomly generated.
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- salt - Random salt for the `kdf`. Size must match the requirements of the KDF (key derivation function). Random number generated via `crypto.getRandomBytes` if nothing is supplied.
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- iv - Initialization vector for the `cipher`. Size must match the requirements of the cipher. Random number generated via `crypto.getRandomBytes` if nothing is supplied.
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- kdf - The key derivation function, see below.
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- dklen - Derived key length. For certain `cipher` settings, this must match the block sizes of those.
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- cipher - The cipher to use. Names must match those of supported by `OpenSSL`, e.g. `aes-128-ctr` or `aes-128-cbc`.
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Depending on the `kdf` selected, the following options are available too.
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For `pbkdf2`:
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- `c` - Number of iterations. Defaults to 262144.
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- `prf` - The only supported (and default) value is `hmac-sha256`. So no point changing it.
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For `scrypt`:
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- `n` - Iteration count. Defaults to 262144.
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- `r` - Block size for the underlying hash. Defaults to 8.
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- `p` - Parallelization factor. Defaults to 1.
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The following settings are favoured by the Go Ethereum implementation and we default to the same:
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- `kdf`: `scrypt`
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- `dklen`: `32`
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- `n`: `262144`
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- `r`: `8`
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- `p`: `1`
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- `cipher`: `aes-128-ctr`
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# EthereumJS
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See our organizational [documentation](https://ethereumjs.readthedocs.io) for an introduction to `EthereumJS` as well as information on current standards and best practices.
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If you want to join for work or do improvements on the libraries have a look at our [contribution guidelines](https://ethereumjs.readthedocs.io/en/latest/contributing.html).
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## License
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MIT License
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Copyright (C) 2016 Alex Beregszaszi
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[actions-badge]: https://github.com/ethereumjs/ethereumjs-wallet/workflows/Build/badge.svg
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[actions-link]: https://github.com/ethereumjs/ethereumjs-wallet/actions
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[coverage-badge]: https://img.shields.io/coveralls/ethereumjs/ethereumjs-wallet.svg
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[coverage-link]: https://coveralls.io/r/ethereumjs/ethereumjs-wallet
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[discord-badge]: https://img.shields.io/static/v1?logo=discord&label=discord&message=Join&color=blue
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[discord-link]: https://discord.gg/TNwARpR
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[npm-badge]: https://img.shields.io/npm/v/ethereumjs-wallet.svg
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[npm-link]: https://www.npmjs.org/package/ethereumjs-wallet
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