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[bytom/vapor.git] / vendor / github.com / multiformats / go-multihash / README.md
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-# go-multihash
-
-[![](https://img.shields.io/badge/made%20by-Protocol%20Labs-blue.svg?style=flat-square)](http://ipn.io)
-[![](https://img.shields.io/badge/project-multiformats-blue.svg?style=flat-square)](https://github.com/multiformats/multiformats)
-[![](https://img.shields.io/badge/freenode-%23ipfs-blue.svg?style=flat-square)](https://webchat.freenode.net/?channels=%23ipfs)
-[![](https://img.shields.io/badge/readme%20style-standard-brightgreen.svg?style=flat-square)](https://github.com/RichardLitt/standard-readme)
-[![GoDoc](https://godoc.org/github.com/multiformats/go-multihash?status.svg)](https://godoc.org/github.com/multiformats/go-multihash)
-[![Travis CI](https://img.shields.io/travis/multiformats/go-multihash.svg?style=flat-square&branch=master)](https://travis-ci.org/multiformats/go-multihash)
-[![codecov.io](https://img.shields.io/codecov/c/github/multiformats/go-multihash.svg?style=flat-square&branch=master)](https://codecov.io/github/multiformats/go-multihash?branch=master)
-
-> [multihash](https://github.com/multiformats/multihash) implementation in Go
-
-## Table of Contents
-
-- [Install](#install)
-- [Usage](#usage)
-- [Maintainers](#maintainers)
-- [Contribute](#contribute)
-- [License](#license)
-
-## Install
-
-`go-multihash` is a standard Go module which can be installed with:
-
-```sh
-go get github.com/multiformats/go-multihash
-```
-
-## Usage
-
-
-### Example
-
-This example takes a standard hex-encoded data and uses `EncodeName` to calculate the SHA1 multihash value for the buffer.
-
-The resulting hex-encoded data corresponds to: `<hash function code><digest size><hash function output>`, which could be re-parsed
-with `Multihash.FromHexString()`.
-
-
-```go
-package main
-
-import (
-       "encoding/hex"
-       "fmt"
-
-       "github.com/multiformats/go-multihash"
-)
-
-func main() {
-       // ignores errors for simplicity.
-       // don't do that at home.
-       // Decode a SHA1 hash to a binary buffer
-       buf, _ := hex.DecodeString("0beec7b5ea3f0fdbc95d0dd47f3c5bc275da8a33")
-
-       // Create a new multihash with it.
-       mHashBuf, _ := multihash.EncodeName(buf, "sha1")
-       // Print the multihash as hex string
-       fmt.Printf("hex: %s\n", hex.EncodeToString(mHashBuf))
-
-       // Parse the binary multihash to a DecodedMultihash
-       mHash, _ := multihash.Decode(mHashBuf)
-       // Convert the sha1 value to hex string
-       sha1hex := hex.EncodeToString(mHash.Digest)
-       // Print all the information in the multihash
-       fmt.Printf("obj: %v 0x%x %d %s\n", mHash.Name, mHash.Code, mHash.Length, sha1hex)
-}
-```
-
-To run, copy to [example/foo.go](example/foo.go) and:
-
-```
-> cd example/
-> go build
-> ./example
-hex: 11140beec7b5ea3f0fdbc95d0dd47f3c5bc275da8a33
-obj: sha1 0x11 20 0beec7b5ea3f0fdbc95d0dd47f3c5bc275da8a33
-```
-
-## Contribute
-
-Contributions welcome. Please check out [the issues](https://github.com/multiformats/go-multihash/issues).
-
-Check out our [contributing document](https://github.com/multiformats/multiformats/blob/master/contributing.md) for more information on how we work, and about contributing in general. Please be aware that all interactions related to multiformats are subject to the IPFS [Code of Conduct](https://github.com/ipfs/community/blob/master/code-of-conduct.md).
-
-Small note: If editing the README, please conform to the [standard-readme](https://github.com/RichardLitt/standard-readme) specification.
-
-## License
-
-[MIT](LICENSE) © 2014 Juan Batiz-Benet