Swarm: Swarm in Ethereum's decentralized and distributed storage solution, comparable to IPFS.

commands.md

go get -d github.com/ethereum/go-ethereum
go install github.com/ethereum/go-ethereum/cmd/geth
go install github.com/ethereum/go-ethereum/cmd/swarm
geth account new
export BZZKEY=970ef9790b54425bea2c02e25cab01e48cf92573
swarm --bzzaccount $BZZKEY

download-from-swarm.md

Commands

geth account new
export BZZKEY=970ef9790b54425bea2c02e25cab01e48cf92573
swarm --bzzaccount $BZZKEY
swarm_download.go

package main

import (
    "fmt"
    "io/ioutil"
    "log"

    bzzclient "github.com/ethereum/go-ethereum/swarm/api/client"
)

func main() {
    client := bzzclient.NewClient("http://127.0.0.1:8500")
    manifestHash := "2e0849490b62e706a5f1cb8e7219db7b01677f2a859bac4b5f522afd2a5f02c0"
    manifest, isEncrypted, err := client.DownloadManifest(manifestHash)
    if err != nil {
        log.Fatal(err)
    }
    fmt.Println(isEncrypted) // false

    for _, entry := range manifest.Entries {
        fmt.Println(entry.Hash)        // 42179060941352ba7b400b16c40f1e1290423a826de2a70587034dc14bc4ab2f
        fmt.Println(entry.ContentType) // text/plain; charset=utf-8
        fmt.Println(entry.Size)        // 12
        fmt.Println(entry.Path)        // ""
    }

    file, err := client.Download(manifestHash, "")
    if err != nil {
        log.Fatal(err)
    }

    content, err := ioutil.ReadAll(file)
    if err != nil {
        log.Fatal(err)
    }
    fmt.Println(string(content)) // hello world
}

swarm_upload.go

package main

import (
    "fmt"
    "log"

    bzzclient "github.com/ethereum/go-ethereum/swarm/api/client"
)

func main() {
    client := bzzclient.NewClient("http://127.0.0.1:8500")

    file, err := bzzclient.Open("hello.txt")
    if err != nil {
        log.Fatal(err)
    }

    manifestHash, err := client.Upload(file, "", false)
    if err != nil {
        log.Fatal(err)
    }
    fmt.Println(manifestHash) // 2e0849490b62e706a5f1cb8e7219db7b01677f2a859bac4b5f522afd2a5f02c0
}