Swarm MRUs: Adaptive frequency / Predictable lookups / API simplification (#17559)

* 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

1 files changed, 0 insertions, 76 deletions

diff --git a/swarm/storage/mru/resource.go b/swarm/storage/mru/resource.go
deleted file mode 100644
index aa83ff62a..000000000
--- a/swarm/storage/mru/resource.go
+++ /dev/null
@@ -1,76 +0,0 @@
-// Copyright 2018 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 mru
-
-import (
-	"bytes"
-	"context"
-	"time"
-
-	"github.com/ethereum/go-ethereum/swarm/storage"
-)
-
-const (
-	defaultStoreTimeout    = 4000 * time.Millisecond
-	hasherCount            = 8
-	resourceHashAlgorithm  = storage.SHA3Hash
-	defaultRetrieveTimeout = 100 * time.Millisecond
-)
-
-// resource caches resource data and the metadata of its root chunk.
-type resource struct {
-	resourceUpdate
-	ResourceMetadata
-	*bytes.Reader
-	lastKey storage.Address
-	updated time.Time
-}
-
-func (r *resource) Context() context.Context {
-	return context.TODO()
-}
-
-// TODO Expire content after a defined period (to force resync)
-func (r *resource) isSynced() bool {
-	return !r.updated.IsZero()
-}
-
-// implements storage.LazySectionReader
-func (r *resource) Size(ctx context.Context, _ chan bool) (int64, error) {
-	if !r.isSynced() {
-		return 0, NewError(ErrNotSynced, "Not synced")
-	}
-	return int64(len(r.resourceUpdate.data)), nil
-}
-
-//returns the resource's human-readable name
-func (r *resource) Name() string {
-	return r.ResourceMetadata.Name
-}
-
-// Helper function to calculate the next update period number from the current time, start time and frequency
-func getNextPeriod(start uint64, current uint64, frequency uint64) (uint32, error) {
-	if current < start {
-		return 0, NewErrorf(ErrInvalidValue, "given current time value %d < start time %d", current, start)
-	}
-	if frequency == 0 {
-		return 0, NewError(ErrInvalidValue, "frequency is 0")
-	}
-	timeDiff := current - start
-	period := timeDiff / frequency
-	return uint32(period + 1), nil
-}