swarm: plan bee for content storage and distribution on web3

This change imports the Swarm protocol codebase. Compared to the 'swarm'
branch, a few mostly cosmetic changes had to be made:

* The various redundant log message prefixes are gone.
* All files now have LGPLv3 license headers.
* Minor code changes were needed to please go vet and make the tests
  pass on Windows.
* Further changes were required to adapt to the go-ethereum develop
  branch and its new Go APIs.

Some code has not (yet) been brought over:

* swarm/cmd/bzzhash: will reappear as cmd/bzzhash later
* swarm/cmd/bzzup.sh: will be reimplemented in cmd/bzzup
* swarm/cmd/makegenesis: will reappear somehow
* swarm/examples/album: will move to a separate repository
* swarm/examples/filemanager: ditto
* swarm/examples/files: will not be merged
* swarm/test/*: will not be merged
* swarm/services/swear: will reappear as contracts/swear when needed

1 files changed, 124 insertions, 0 deletions

diff --git a/swarm/api/config_test.go b/swarm/api/config_test.go
new file mode 100644
index 000000000..874701119
--- /dev/null
+++ b/swarm/api/config_test.go
@@ -0,0 +1,124 @@
+// Copyright 2016 The go-ethereum Authors
+// This file is part of the go-ethereum library.
+//
+// The go-ethereum library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The go-ethereum library 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 Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
+
+package api
+
+import (
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"strings"
+	"testing"
+
+	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/crypto"
+)
+
+var (
+	hexprvkey     = "65138b2aa745041b372153550584587da326ab440576b2a1191dd95cee30039c"
+	defaultConfig = `{
+    "ChunkDbPath": "` + filepath.Join("TMPDIR", "0d2f62485607cf38d9d795d93682a517661e513e", "chunks") + `",
+    "DbCapacity": 5000000,
+    "CacheCapacity": 5000,
+    "Radius": 0,
+    "Branches": 128,
+    "Hash": "SHA3",
+    "CallInterval": 3000000000,
+    "KadDbPath": "` + filepath.Join("TMPDIR", "0d2f62485607cf38d9d795d93682a517661e513e", "bzz-peers.json") + `",
+    "MaxProx": 8,
+    "ProxBinSize": 2,
+    "BucketSize": 4,
+    "PurgeInterval": 151200000000000,
+    "InitialRetryInterval": 42000000,
+    "MaxIdleInterval": 42000000000,
+    "ConnRetryExp": 2,
+    "Swap": {
+        "BuyAt": 20000000000,
+        "SellAt": 20000000000,
+        "PayAt": 100,
+        "DropAt": 10000,
+        "AutoCashInterval": 300000000000,
+        "AutoCashThreshold": 50000000000000,
+        "AutoDepositInterval": 300000000000,
+        "AutoDepositThreshold": 50000000000000,
+        "AutoDepositBuffer": 100000000000000,
+        "PublicKey": "0x045f5cfd26692e48d0017d380349bcf50982488bc11b5145f3ddf88b24924299048450542d43527fbe29a5cb32f38d62755393ac002e6bfdd71b8d7ba725ecd7a3",
+        "Contract": "0x0000000000000000000000000000000000000000",
+        "Beneficiary": "0x0d2f62485607cf38d9d795d93682a517661e513e"
+    },
+    "RequestDbPath": "` + filepath.Join("TMPDIR", "0d2f62485607cf38d9d795d93682a517661e513e", "requests") + `",
+    "RequestDbBatchSize": 512,
+    "KeyBufferSize": 1024,
+    "SyncBatchSize": 128,
+    "SyncBufferSize": 128,
+    "SyncCacheSize": 1024,
+    "SyncPriorities": [
+        2,
+        1,
+        1,
+        0,
+        0
+    ],
+    "SyncModes": [
+        true,
+        true,
+        true,
+        true,
+        false
+    ],
+    "Path": "` + filepath.Join("TMPDIR", "0d2f62485607cf38d9d795d93682a517661e513e") + `",
+    "Port": "8500",
+    "PublicKey": "0x045f5cfd26692e48d0017d380349bcf50982488bc11b5145f3ddf88b24924299048450542d43527fbe29a5cb32f38d62755393ac002e6bfdd71b8d7ba725ecd7a3",
+    "BzzKey": "0xe861964402c0b78e2d44098329b8545726f215afa737d803714a4338552fcb81",
+    "EnsRoot": "0xd344889e0be3e9ef6c26b0f60ef66a32e83c1b69"
+}`
+)
+
+func TestConfigWriteRead(t *testing.T) {
+	tmp, err := ioutil.TempDir(os.TempDir(), "bzz-test")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer os.RemoveAll(tmp)
+
+	prvkey := crypto.ToECDSA(common.Hex2Bytes(hexprvkey))
+	orig, err := NewConfig(tmp, common.Address{}, prvkey)
+	if err != nil {
+		t.Fatalf("expected no error, got %v", err)
+	}
+	account := crypto.PubkeyToAddress(prvkey.PublicKey)
+	dirpath := filepath.Join(tmp, common.Bytes2Hex(account.Bytes()))
+	confpath := filepath.Join(dirpath, "config.json")
+	data, err := ioutil.ReadFile(confpath)
+	if err != nil {
+		t.Fatalf("default config file cannot be read: %v", err)
+	}
+	exp := strings.Replace(defaultConfig, "TMPDIR", tmp, -1)
+	exp = strings.Replace(exp, "\\", "\\\\", -1)
+
+	if string(data) != exp {
+		t.Fatalf("default config mismatch:\nexpected: %v\ngot: %v", exp, string(data))
+	}
+
+	conf, err := NewConfig(tmp, common.Address{}, prvkey)
+	if err != nil {
+		t.Fatalf("expected no error, got %v", err)
+	}
+	if conf.Swap.Beneficiary.Hex() != orig.Swap.Beneficiary.Hex() {
+		t.Fatalf("expected beneficiary from loaded config %v to match original %v", conf.Swap.Beneficiary.Hex(), orig.Swap.Beneficiary.Hex())
+	}
+
+}