38 lines
1.3 KiB
Markdown
38 lines
1.3 KiB
Markdown
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# Eth ENS Namehash [](https://circleci.com/gh/danfinlay/eth-ens-namehash)
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A javascript library for generating Ethereum Name Service (ENS) namehashes per [spec](https://github.com/ethereum/EIPs/issues/137).
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[Available on NPM](https://www.npmjs.com/package/eth-ens-namehash)
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## Installation
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`npm install eth-ens-namehash -S`
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## Usage
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```javascript
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var namehash = require('eth-ens-namehash')
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var hash = namehash.hash('foo.eth')
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// '0xde9b09fd7c5f901e23a3f19fecc54828e9c848539801e86591bd9801b019f84f'
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// Also supports normalizing strings to ENS compatibility:
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var input = getUserInput()
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var normalized = namehash.normalize(input)
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```
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## Security Warning
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ENS Supports UTF-8 characters, and so many duplicate names are possible. For example:
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- faceboоk.eth
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- facebook.eth
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The first one has non-ascii chars. (control+F on this page and search for facebook, only the second one will match).
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namehash.normalize() doesn't automagically remap those, and so other precautions should be taken to avoid user phishing.
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## Development
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This module supports advanced JavaScript syntax, but exports an ES5-compatible module. To re-build the exported module after making changes, run `npm run bundle` (must have [browserify](http://browserify.org/) installed).
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