cmd/swarm, metrics, swarm/api/client, swarm/storage, swarm/metrics, swarm/api/http: add instrumentation (#18274)

So that we only see the log message when we actually have to migrate.

cmd/swarm, swarm/api/http, swarm/bmt, swarm/fuse, swarm/network/stream, swarm/storage, swarm/storage/encryption, swarm/testutil: use pseudo-random instead of crypto-random for test files content generation (#18083)

- Replace "crypto/rand" to "math/rand" for files content generation
- Remove swarm/network_test.go.Shuffle and swarm/btm/btm_test.go.Shuffle - because go1.9 support dropped (see https://github.com/ethereum/go-ethereum/pull/17807 and comments to swarm/network_test.go.Shuffle)

On file access LDBStore's tryAccessIdx() function created a faulty
GC Index Data entry, because not indexing the ikey correctly.
That caused the chunk addresses/hashes to start with '00' and the last
two digits were dropped. => Incorrect chunk address.

Besides the fix, the commit also contains a schema change which will
run the CleanGCIndex() function to clean the GC index from erroneous
entries.

Note: CleanGCIndex() rebuilds the index from scratch which can take
a really-really long time with a huge DB (possibly an hour).

Access count was not incremented when chunk was retrieved
from cache. So the garbage collector might have deleted the most
frequently accessed chunk from disk.
Co-authored-by: NFerenc Szabo <ferenc.szabo@ethereum.org>

* swarm, cmd/swarm: address ineffectual assignments

* swarm/network: remove unused vars from testHandshake

* swarm/storage/feed: revert cursor changes

* swarm: clean up unused private types and functions

Those that were identified by code inspection tool.

* swarm/storage: move/add Proximity GoDoc from deleted private function

The mentioned proximity() private function was deleted in:
1ca8fc1e6fa0ab4ab1aaca06d6fb32e173cd5f2f

* swarm/storage: lower constants for faster tests

* swarm: reduce test size for TestLocalStoreAndRetrieve

* swarm: reduce nodes for dec_inc_node_count

* swarm/storage/mru: Adaptive Frequency

swarm/storage/mru/lookup: fixed getBaseTime
Added NewEpoch constructor

swarm/api/client: better error handling in GetResource()


swarm/storage/mru: Renamed structures.
Renamed ResourceMetadata to ResourceID. 
Renamed ResourceID.Name to ResourceID.Topic

swarm/storage/mru: Added binarySerializer interface and test tools

swarm/storage/mru/lookup: Changed base time to time and + marshallers

swarm/storage/mru:  Added ResourceID (former resourceMetadata)

swarm/storage/mru: Added ResourceViewId and serialization tests

swarm/storage/mru/lookup: fixed epoch unmarshaller. Added Epoch Equals

swarm/storage/mru: Fixes as per review comments

cmd/swarm: reworded resource create/update help text regarding topic

swarm/storage/mru: Added UpdateLookup and serializer tests

swarm/storage/mru: Added UpdateHeader, serializers and tests

swarm/storage/mru: changed UpdateAddr / epoch to Base()

swarm/storage/mru: Added resourceUpdate serializer and tests

swarm/storage/mru: Added SignedResourceUpdate tests and serializers

swarm/storage/mru/lookup: fixed GetFirstEpoch bug

swarm/storage/mru: refactor, comments, cleanup

Also added tests for Topic
swarm/storage/mru: handler tests pass

swarm/storage/mru: all resource package tests pass

swarm/storage/mru: resource test pass after adding
timestamp checking support

swarm/storage/mru: Added JSON serializers to ResourceIDView structures

swarm/storage/mru: Sever, client, API test pass

swarm/storage/mru: server test pass

swarm/storage/mru: Added topic length check

swarm/storage/mru: removed some literals,
improved "previous lookup" test case

swarm/storage/mru: some fixes and comments as per review

swarm/storage/mru: first working version without metadata chunk

swarm/storage/mru: Various fixes as per review

swarm/storage/mru: client test pass

swarm/storage/mru: resource query strings and manifest-less queries


swarm/storage/mru: simplify naming

swarm/storage/mru: first autofreq working version



swarm/storage/mru: renamed ToValues to AppendValues

swarm/resource/mru: Added ToValues / FromValues for URL query strings

swarm/storage/mru: Changed POST resource to work with query strings.
No more JSON.

swarm/storage/mru: removed resourceid

swarm/storage/mru: Opened up structures

swarm/storage/mru: Merged Request and SignedResourceUpdate

swarm/storage/mru: removed initial data from CLI resource create

swarm/storage/mru: Refactor Topic as a direct fixed-length array

swarm/storage/mru/lookup: Comprehensive GetNextLevel tests

swarm/storage/mru: Added comments

Added length checks in Topic
swarm/storage/mru: fixes in tests and some code comments

swarm/storage/mru/lookup: new optimized lookup algorithm

swarm/api: moved getResourceView to api out of server

swarm/storage/mru: Lookup algorithm working

swarm/storage/mru: comments and renamed NewLookupParams

Deleted commented code


swarm/storage/mru/lookup: renamed Epoch.LaterThan to After

swarm/storage/mru/lookup: Comments and tidying naming



swarm/storage/mru: fix lookup algorithm

swarm/storage/mru: exposed lookup hint
removed updateheader

swarm/storage/mru/lookup: changed GetNextEpoch for initial values

swarm/storage/mru: resource tests pass

swarm/storage/mru: valueSerializer interface and tests



swarm/storage/mru/lookup: Comments, improvements, fixes, more tests

swarm/storage/mru: renamed UpdateLookup to ID, LookupParams to Query

swarm/storage/mru: renamed query receiver var



swarm/cmd: MRU CLI tests

* cmd/swarm: remove rogue fmt

* swarm/storage/mru: Add version / header for future use

* swarm/storage/mru: Fixes/comments as per review

cmd/swarm: remove rogue fmt

swarm/storage/mru: Add version / header for future use-

* swarm/storage/mru: fix linter errors

* cmd/swarm: Speeded up TestCLIResourceUpdate

Package p2p/enode provides a generalized representation of p2p nodes
which can contain arbitrary information in key/value pairs. It is also
the new home for the node database. The "v4" identity scheme is also
moved here from p2p/enr to remove the dependency on Ethereum crypto from
that package.

Record signature handling is changed significantly. The identity scheme
registry is removed and acceptable schemes must be passed to any method
that needs identity. This means records must now be validated explicitly
after decoding.

The enode API is designed to make signature handling easy and safe: most
APIs around the codebase work with enode.Node, which is a wrapper around
a valid record. Going from enr.Record to enode.Node requires a valid
signature.

* p2p/discover: port to p2p/enode

This ports the discovery code to the new node representation in
p2p/enode. The wire protocol is unchanged, this can be considered a
refactoring change. The Kademlia table can now deal with nodes using an
arbitrary identity scheme. This requires a few incompatible API changes:

  - Table.Lookup is not available anymore. It used to take a public key
    as argument because v4 protocol requires one. Its replacement is
    LookupRandom.
  - Table.Resolve takes *enode.Node instead of NodeID. This is also for
    v4 protocol compatibility because nodes cannot be looked up by ID
    alone.
  - Types Node and NodeID are gone. Further commits in the series will be
    fixes all over the the codebase to deal with those removals.

* p2p: port to p2p/enode and discovery changes

This adapts package p2p to the changes in p2p/discover. All uses of
discover.Node and discover.NodeID are replaced by their equivalents from
p2p/enode.

New API is added to retrieve the enode.Node instance of a peer. The
behavior of Server.Self with discovery disabled is improved. It now
tries much harder to report a working IP address, falling back to
127.0.0.1 if no suitable address can be determined through other means.
These changes were needed for tests of other packages later in the
series.

* p2p/simulations, p2p/testing: port to p2p/enode

No surprises here, mostly replacements of discover.Node, discover.NodeID
with their new equivalents. The 'interesting' API changes are:

 - testing.ProtocolSession tracks complete nodes, not just their IDs.
 - adapters.NodeConfig has a new method to create a complete node.

These changes were needed to make swarm tests work.

Note that the NodeID change makes the code incompatible with old
simulation snapshots.

* whisper/whisperv5, whisper/whisperv6: port to p2p/enode

This port was easy because whisper uses []byte for node IDs and
URL strings in the API.

* eth: port to p2p/enode

Again, easy to port because eth uses strings for node IDs and doesn't
care about node information in any way.

* les: port to p2p/enode

Apart from replacing discover.NodeID with enode.ID, most changes are in
the server pool code. It now deals with complete nodes instead
of (Pubkey, IP, Port) triples. The database format is unchanged for now,
but we should probably change it to use the node database later.

* node: port to p2p/enode

This change simply replaces discover.Node and discover.NodeID with their
new equivalents.

* swarm/network: port to p2p/enode

Swarm has its own node address representation, BzzAddr, containing both
an overlay address (the hash of a secp256k1 public key) and an underlay
address (enode:// URL).

There are no changes to the BzzAddr format in this commit, but certain
operations such as creating a BzzAddr from a node ID are now impossible
because node IDs aren't public keys anymore.

Most swarm-related changes in the series remove uses of
NewAddrFromNodeID, replacing it with NewAddr which takes a complete node
as argument. ToOverlayAddr is removed because we can just use the node
ID directly.

Co-authored-by: NJanos Guljas <janos@resenje.org>
Co-authored-by: NBalint Gabor <balint.g@gmail.com>
Co-authored-by: NAnton Evangelatov <anton.evangelatov@gmail.com>
Co-authored-by: NViktor Trón <viktor.tron@gmail.com>

* swarm/storage: remove redundant increments for dataIdx and entryCnt

* swarm/storage: add Delete to LDBStore

* swarm/storage: wait for garbage collection

* swarm/storage/encryption: async segmentwise encryption/decryption

* swarm/storage: adapt hasherstore to encryption API change

* swarm/api: adapt RefEncryption for AC to new Encryption API

* swarm/storage/encryption: address review comments

* swarm/network, swarm/storage: validate default chunk size

* swarm/bmt, swarm/network, swarm/storage: update BMT hash initialisation

* swarm/bmt: move segmentCount to tests

* swarm/chunk: change chunk.DefaultSize to be untyped const

* swarm/storage: add size validator

* swarm/storage: add chunk size validation to localstore

* swarm/storage: move validation from localstore to validator

* swarm/storage: global chunk rules in MRU

* swarm/storage/mru: Add embedded publickey and remove ENS dep

This commit breaks swarm, swarm/api...
but tests in swarm/storage/mru pass

* swarm: Refactor swarm, swarm/api to mru changes, make tests pass

* swarm/storage/mru: Remove self from recv, remove test ens vldtr

* swarm/storage/mru: Remove redundant test, expose ResourceHash mthd

* swarm/storage/mru: Make HeaderGetter mandatory + godoc fixes

* swarm/storage: Remove validator prefix for metadata chunk

* swarm/storage/mru: Use Address instead of PublicKey

* swarm/storage/mru: Change index from name to metadata chunk addr

* swarm/storage/mru: Refactor swarm/api/... to MRU index changes

* swarm/storage/mru: Refactor cleanup

* swarm/storage/mru: Rebase cleanup

* swarm: Use constructor for GenericSigner MRU in swarm.go

* swarm/storage: Change to BMTHash for MRU hashing

* swarm/storage: Reduce loglevel on chunk validator logs

* swarm/storage/mru: Delint

* swarm: MRU Rebase cleanup

* swarm/storage/mru: client-side mru signatures

Rebase to PR #668 and fix all conflicts

* swarm/storage/mru:  refactor and documentation

* swarm/resource/mru: error-checking  tests for parseUpdate/newUpdateChunk

* swarm/storage/mru: Added resourcemetadata tests

* swarm/storage/mru: Added tests  for UpdateRequest

* swarm/storage/mru: more test coverage for UpdateRequest and comments

* swarm/storage/mru: Avoid fake chunks in parseUpdate()

* swarm/storage/mru: Documented resource.go extensively

moved some functions where they make most sense

* swarm/storage/mru: increase test coverage for UpdateRequest and

variable name changes throughout to increase consistency

* swarm/storage/mru: moved default timestamp to NewCreateRequest-

* swarm/storage/mru: lookup refactor

* swarm/storage/mru: added comments and renamed raw flag to rawmru

* swarm/storage/mru: fix receiver typo

* swarm/storage/mru: refactored update chunk new/create

* swarm/storage/mru:  refactored signature digest to avoid malleability

* swarm/storage/mru: optimize update data serialization

* swarm/storage/mru: refactor and cleanup

* swarm/storage/mru: add timestamp struct and serialization

* swarm/storage/mru: fix lint error and mark some old code for deletion

* swarm/storage/mru: remove unnecessary variable

* swarm/storage/mru: Added more comments throughout

* swarm/storage/mru: Refactored metadata chunk layout + extensive error...

* swarm/storage/mru: refactor cli parser
Changed resource info output to JSON

* swarm/storage/mru: refactor serialization for extensibility

refactored error messages to NewErrorf

* swarm/storage/mru: Moved Signature to resource_sign.
Check Sign errors in server tests

* swarm/storage/mru: Remove isSafeName() checks

* swarm/storage/mru: scrubbed off all references to "block" for time

* swarm/storage/mru: removed superfluous isSynced() call.

* swarm/storage/mru: remove isMultihash() and ToSafeName functions

* swarm/storage/mru: various fixes and comments

* swarm/storage/mru: decoupled cli for independent create/update
* Made resource name optional
* Removed unused LookupPrevious

* swarm/storage/mru: Decoupled resource create / update & refactor

* swarm/storage/mru: Fixed some comments as per issues raised in PR #743

* swarm/storage/mru: Cosmetic changes as per #743 comments

* swarm/storage/mru: refct request encoder/decoder > marshal/unmarshal

* swarm/storage/mru: Cosmetic changes as per review in #748

* swarm/storage/mru: removed timestamp proof placeholder

* swarm/storage/mru: cosmetic/doc/fixes changes as per comments in #704

* swarm/storage/mru: removed unnecessary check in Handler.update

* swarm/storage/mru: Implemented Marshaler/Unmarshaler iface in Request

* swarm/storage/mru: Fixed linter error

* swarm/storage/mru: removed redundant address in signature digest

* swarm/storage/mru: fixed bug: LookupLatestVersionInPeriod not working

* swarm/storage/mru: Unfold Request creation API for create or update+create
set common time source for mru package

* swarm/api/http: fix HandleGetResource error variable shadowed
when requesting a resource that does not exist

* swarm/storage/mru: Add simple check to detect duplicate updates

* swarm/storage/mru: moved Multihash() to the right place.

* cmd/swarm: remove unneeded clientaccountmanager.go

* swarm/storage/mru: Changed some comments as per reviews in #784

* swarm/storage/mru: Made SignedResourceUpdate.GetDigest() public

* swarm/storage/mru: cosmetic changes as per comments in #784

* cmd/swarm: Inverted --multihash flag default

* swarm/storage/mru: removed Verify from SignedResourceUpdate.fromChunk

* swarm/storage/mru: Moved validation code out of serializer
Cosmetic / comment changes

* swarm/storage/mru: Added unit tests for UpdateLookup

* swarm/storage/mru: Increased coverage of metadata serialization

* swarm/storage/mru: Increased test coverage of updateHeader serializers

* swarm/storage/mru: Add resourceUpdate serializer test

* swarm: propagate ctx, enable opentracing

* swarm/tracing: log error when tracing is misconfigured

* cmd/swarm: minor cli flag text adjustments

* swarm/api/http: sticky footer for swarm landing page using flex

* swarm/api/http: sticky footer for error pages and fix for multiple choices

* cmd/swarm, swarm/storage, swarm: fix  mingw on windows test issues

* cmd/swarm: update description of swarm cmd

* swarm: added network ID test

* cmd/swarm: support for smoke tests on the production swarm cluster

* cmd/swarm/swarm-smoke: simplify cluster logic as per suggestion

* swarm: propagate ctx to internal apis (#754)

* swarm/metrics: collect disk measurements

* swarm/bmt: fix io.Writer interface

  * Write now tolerates arbitrary variable buffers
  * added variable buffer tests
  * Write loop and finalise optimisation
  * refactor / rename
  * add tests for empty input

* swarm/pss: (UPDATE) Generic notifications package (#744)

swarm/pss: Generic package for creating pss notification svcs

* swarm: Adding context to more functions

* swarm/api: change colour of landing page in templates

* swarm/api: change landing page to react to enter keypress