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// Copyright 2016 The go-ethereum Authors
// This file is part of go-ethereum.
//
// go-ethereum is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// go-ethereum is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with go-ethereum. If not, see <http://www.gnu.org/licenses/>.
// Command resource allows the user to create and update signed mutable resource updates
package main
import (
"fmt"
"strings"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/common/hexutil"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/cmd/utils"
swarm "github.com/ethereum/go-ethereum/swarm/api/client"
"github.com/ethereum/go-ethereum/swarm/storage/mru"
"gopkg.in/urfave/cli.v1"
)
func NewGenericSigner(ctx *cli.Context) mru.Signer {
return mru.NewGenericSigner(getPrivKey(ctx))
}
func getTopic(ctx *cli.Context) (topic mru.Topic) {
var name = ctx.String(SwarmResourceNameFlag.Name)
var relatedTopic = ctx.String(SwarmResourceTopicFlag.Name)
var relatedTopicBytes []byte
var err error
if relatedTopic != "" {
relatedTopicBytes, err = hexutil.Decode(relatedTopic)
if err != nil {
utils.Fatalf("Error parsing topic: %s", err)
}
}
topic, err = mru.NewTopic(name, relatedTopicBytes)
if err != nil {
utils.Fatalf("Error parsing topic: %s", err)
}
return topic
}
// swarm resource create <frequency> [--name <name>] [--data <0x Hexdata> [--multihash=false]]
// swarm resource update <Manifest Address or ENS domain> <0x Hexdata> [--multihash=false]
// swarm resource info <Manifest Address or ENS domain>
func resourceCreate(ctx *cli.Context) {
var (
bzzapi = strings.TrimRight(ctx.GlobalString(SwarmApiFlag.Name), "/")
client = swarm.NewClient(bzzapi)
)
newResourceRequest := mru.NewFirstRequest(getTopic(ctx))
newResourceRequest.View.User = resourceGetUser(ctx)
manifestAddress, err := client.CreateResource(newResourceRequest)
if err != nil {
utils.Fatalf("Error creating resource: %s", err.Error())
return
}
fmt.Println(manifestAddress) // output manifest address to the user in a single line (useful for other commands to pick up)
}
func resourceUpdate(ctx *cli.Context) {
args := ctx.Args()
var (
bzzapi = strings.TrimRight(ctx.GlobalString(SwarmApiFlag.Name), "/")
client = swarm.NewClient(bzzapi)
manifestAddressOrDomain = ctx.String(SwarmResourceManifestFlag.Name)
)
if len(args) < 1 {
fmt.Println("Incorrect number of arguments")
cli.ShowCommandHelpAndExit(ctx, "update", 1)
return
}
signer := NewGenericSigner(ctx)
data, err := hexutil.Decode(args[0])
if err != nil {
utils.Fatalf("Error parsing data: %s", err.Error())
return
}
var updateRequest *mru.Request
var query *mru.Query
if manifestAddressOrDomain == "" {
query = new(mru.Query)
query.User = signer.Address()
query.Topic = getTopic(ctx)
}
// Retrieve resource status and metadata out of the manifest
updateRequest, err = client.GetResourceMetadata(query, manifestAddressOrDomain)
if err != nil {
utils.Fatalf("Error retrieving resource status: %s", err.Error())
}
// set the new data
updateRequest.SetData(data)
// sign update
if err = updateRequest.Sign(signer); err != nil {
utils.Fatalf("Error signing resource update: %s", err.Error())
}
// post update
err = client.UpdateResource(updateRequest)
if err != nil {
utils.Fatalf("Error updating resource: %s", err.Error())
return
}
}
func resourceInfo(ctx *cli.Context) {
var (
bzzapi = strings.TrimRight(ctx.GlobalString(SwarmApiFlag.Name), "/")
client = swarm.NewClient(bzzapi)
manifestAddressOrDomain = ctx.String(SwarmResourceManifestFlag.Name)
)
var query *mru.Query
if manifestAddressOrDomain == "" {
query = new(mru.Query)
query.Topic = getTopic(ctx)
query.User = resourceGetUser(ctx)
}
metadata, err := client.GetResourceMetadata(query, manifestAddressOrDomain)
if err != nil {
utils.Fatalf("Error retrieving resource metadata: %s", err.Error())
return
}
encodedMetadata, err := metadata.MarshalJSON()
if err != nil {
utils.Fatalf("Error encoding metadata to JSON for display:%s", err)
}
fmt.Println(string(encodedMetadata))
}
func resourceGetUser(ctx *cli.Context) common.Address {
var user = ctx.String(SwarmResourceUserFlag.Name)
if user != "" {
return common.HexToAddress(user)
}
pk := getPrivKey(ctx)
if pk == nil {
utils.Fatalf("Cannot read private key. Must specify --user or --bzzaccount")
}
return crypto.PubkeyToAddress(pk.PublicKey)
}
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