Merge pull request #18 from vulcanize/final_tweaks

fixes from integration

README.md

@@ -71,7 +71,7 @@ func main() {
 
     database := ipfsethdb.NewDatabase(ipfsNode.Blocks)
     stateDatabase := state.NewDatabase(database)
-    stateDB, _ := state.New(common.Hash{}, stateDatabase, nil)
+    stateDB, _ := state.New(common.Hash{}, stateDatabase)
     stateDBNodeIterator := state.NewNodeIterator(stateDB)
     // do stuff with the statedb node iterator
 }

database.go

@@ -154,15 +154,23 @@ func (d *Database) NewBatch() ethdb.Batch {
 	return b
 }
 
-// NewIterator satisfies the ethdb.Iteratee interface
+// NewIterator creates a binary-alphabetical iterator over the entire keyspace
-// it creates a binary-alphabetical iterator over a subset
+// contained within the key-value database.
-// of database content with a particular key prefix, starting at a particular
+func (d *Database) NewIterator() ethdb.Iterator {
-// initial key (or after, if it does not exist).
+	return NewIterator([]byte{}, []byte{}, d.blockService)
-//
+}
-// Note: This method assumes that the prefix is NOT part of the start, so there's
+
-// no need for the caller to prepend the prefix to the start
+// NewIteratorWithStart creates a binary-alphabetical iterator over a subset of
-func (d *Database) NewIterator(prefix []byte, start []byte) ethdb.Iterator {
+// database content starting at a particular initial key (or after, if it does
-	return NewIterator(start, prefix, d.blockService)
+// not exist).
+func (d *Database) NewIteratorWithStart(start []byte) ethdb.Iterator {
+	return NewIterator(start, []byte{}, d.blockService)
+}
+
+// NewIteratorWithPrefix creates a binary-alphabetical iterator over a subset
+// of database content with a particular key prefix.
+func (d *Database) NewIteratorWithPrefix(prefix []byte) ethdb.Iterator {
+	return NewIterator([]byte{}, prefix, d.blockService)
 }
 
 // Close satisfies the io.Closer interface

go.mod

@@ -3,7 +3,7 @@ module github.com/vulcanize/ipfs-ethdb
 go 1.13
 
 require (
-	github.com/ethereum/go-ethereum v1.9.15
+	github.com/ethereum/go-ethereum v1.9.10
 	github.com/hashicorp/golang-lru v0.5.4
 	github.com/ipfs/go-block-format v0.0.2
 	github.com/ipfs/go-blockservice v0.1.3
@@ -16,4 +16,5 @@ require (
 	github.com/multiformats/go-multihash v0.0.13
 	github.com/onsi/ginkgo v1.8.0
 	github.com/onsi/gomega v1.5.0
+	github.com/sirupsen/logrus v1.6.0
 )

go.sum

@@ -15,7 +15,10 @@ github.com/Azure/go-autorest/tracing v0.5.0/go.mod h1:r/s2XiOKccPW3HrqB+W0TQzfbt
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
 github.com/Kubuxu/go-os-helper v0.0.1/go.mod h1:N8B+I7vPCT80IcP58r50u4+gEEcsZETFUpAzWW2ep1Y=
 github.com/OneOfOne/xxhash v1.2.2/go.mod h1:HSdplMjZKSmBqAxg5vPj2TmRDmfkzw+cTzAElWljhcU=
+github.com/OneOfOne/xxhash v1.2.5/go.mod h1:eZbhyaAYD41SGSSsnmcpxVoRiQ/MPUTjUdIIOT9Um7Q=
 github.com/StackExchange/wmi v0.0.0-20180116203802-5d049714c4a6/go.mod h1:3eOhrUMpNV+6aFIbp5/iudMxNCF27Vw2OZgy4xEx0Fg=
+github.com/VictoriaMetrics/fastcache v1.5.3 h1:2odJnXLbFZcoV9KYtQ+7TH1UOq3dn3AssMgieaezkR4=
+github.com/VictoriaMetrics/fastcache v1.5.3/go.mod h1:+jv9Ckb+za/P1ZRg/sulP5Ni1v49daAVERr0H3CuscE=
 github.com/VictoriaMetrics/fastcache v1.5.7 h1:4y6y0G8PRzszQUYIQHHssv/jgPHAb5qQuuDNdCbyAgw=
 github.com/VictoriaMetrics/fastcache v1.5.7/go.mod h1:ptDBkNMQI4RtmVo8VS/XwRY6RoTu1dAWCbrk+6WsEM8=
 github.com/aead/siphash v1.0.1/go.mod h1:Nywa3cDsYNNK3gaciGTWPwHt0wlpNV15vwmswBAUSII=
@@ -41,6 +44,7 @@ github.com/btcsuite/winsvc v1.0.0/go.mod h1:jsenWakMcC0zFBFurPLEAyrnc/teJEM1O46f
 github.com/cespare/cp v0.1.0/go.mod h1:SOGHArjBr4JWaSDEVpWpo/hNg6RoKrls6Oh40hiwW+s=
 github.com/cespare/xxhash v1.1.0 h1:a6HrQnmkObjyL+Gs60czilIUGqrzKutQD6XZog3p+ko=
 github.com/cespare/xxhash v1.1.0/go.mod h1:XrSqR1VqqWfGrhpAt58auRo0WTKS1nRRg3ghfAqPWnc=
+github.com/cespare/xxhash/v2 v2.0.1-0.20190104013014-3767db7a7e18/go.mod h1:HD5P3vAIAh+Y2GAxg0PrPN1P8WkepXGpjbUPDHJqqKM=
 github.com/cespare/xxhash/v2 v2.1.1 h1:6MnRN8NT7+YBpUIWxHtefFZOKTAPgGjpQSxqLNn0+qY=
 github.com/cespare/xxhash/v2 v2.1.1/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
 github.com/cloudflare/cloudflare-go v0.10.2-0.20190916151808-a80f83b9add9/go.mod h1:1MxXX1Ux4x6mqPmjkUgTP1CdXIBXKX7T+Jk9Gxrmx+U=
@@ -57,9 +61,16 @@ github.com/dgryski/go-farm v0.0.0-20190104051053-3adb47b1fb0f/go.mod h1:SqUrOPUn
 github.com/dgryski/go-sip13 v0.0.0-20181026042036-e10d5fee7954/go.mod h1:vAd38F8PWV+bWy6jNmig1y/TA+kYO4g3RSRF0IAv0no=
 github.com/dlclark/regexp2 v1.2.0/go.mod h1:2pZnwuY/m+8K6iRw6wQdMtk+rH5tNGR1i55kozfMjCc=
 github.com/docker/docker v1.4.2-0.20180625184442-8e610b2b55bf/go.mod h1:eEKB0N0r5NX/I1kEveEz05bcu8tLC/8azJZsviup8Sk=
+github.com/dop251/goja v0.0.0-20200106141417-aaec0e7bde29/go.mod h1:Mw6PkjjMXWbTj+nnj4s3QPXq1jaT0s5pC0iFD4+BOAA=
 github.com/dop251/goja v0.0.0-20200219165308-d1232e640a87/go.mod h1:Mw6PkjjMXWbTj+nnj4s3QPXq1jaT0s5pC0iFD4+BOAA=
 github.com/dustin/go-humanize v1.0.0/go.mod h1:HtrtbFcZ19U5GC7JDqmcUSB87Iq5E25KnS6fMYU6eOk=
 github.com/edsrzf/mmap-go v0.0.0-20160512033002-935e0e8a636c/go.mod h1:YO35OhQPt3KJa3ryjFM5Bs14WD66h8eGKpfaBNrHW5M=
+github.com/elastic/gosigar v0.8.1-0.20180330100440-37f05ff46ffa h1:XKAhUk/dtp+CV0VO6mhG2V7jA9vbcGcnYF/Ay9NjZrY=
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+github.com/ethereum/go-ethereum v1.9.10 h1:jooX7tWcscpC7ytufk73t9JMCeJQ7aJF2YmZJQEuvFo=
+github.com/ethereum/go-ethereum v1.9.10/go.mod h1:lXHkVo/MTvsEXfYsmNzelZ8R1e0DTvdk/wMZJIRpaRw=
+github.com/ethereum/go-ethereum v1.9.11 h1:Z0jugPDfuI5qsPY1XgBGVwikpdFK/ANqP7MrYvkmk+A=
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 github.com/fatih/color v1.3.0/go.mod h1:Zm6kSWBoL9eyXnKyktHP6abPY2pDugNf5KwzbycvMj4=
@@ -92,11 +103,13 @@ github.com/gorilla/websocket v1.4.1-0.20190629185528-ae1634f6a989/go.mod h1:E7qH
 github.com/graph-gophers/graphql-go v0.0.0-20191115155744-f33e81362277/go.mod h1:9CQHMSxwO4MprSdzoIEobiHpoLtHm77vfxsvsIN5Vuc=
 github.com/gxed/hashland/keccakpg v0.0.1/go.mod h1:kRzw3HkwxFU1mpmPP8v1WyQzwdGfmKFJ6tItnhQ67kU=
 github.com/gxed/hashland/murmur3 v0.0.1/go.mod h1:KjXop02n4/ckmZSnY2+HKcLud/tcmvhST0bie/0lS48=
+github.com/hashicorp/golang-lru v0.0.0-20160813221303-0a025b7e63ad/go.mod h1:/m3WP610KZHVQ1SGc6re/UDhFvYD7pJ4Ao+sR/qLZy8=
 github.com/hashicorp/golang-lru v0.5.1/go.mod h1:/m3WP610KZHVQ1SGc6re/UDhFvYD7pJ4Ao+sR/qLZy8=
 github.com/hashicorp/golang-lru v0.5.4 h1:YDjusn29QI/Das2iO9M0BHnIbxPeyuCHsjMW+lJfyTc=
 github.com/hashicorp/golang-lru v0.5.4/go.mod h1:iADmTwqILo4mZ8BN3D2Q6+9jd8WM5uGBxy+E8yxSoD4=
 github.com/hpcloud/tail v1.0.0 h1:nfCOvKYfkgYP8hkirhJocXT2+zOD8yUNjXaWfTlyFKI=
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+github.com/huin/goupnp v0.0.0-20161224104101-679507af18f3/go.mod h1:MZ2ZmwcBpvOoJ22IJsc7va19ZwoheaBk43rKg12SKag=
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@@ -167,6 +180,7 @@ github.com/karalabe/usb v0.0.0-20190919080040-51dc0efba356/go.mod h1:Od972xHfMJo
 github.com/kisielk/errcheck v1.1.0/go.mod h1:EZBBE59ingxPouuu3KfxchcWSUPOHkagtvWXihfKN4Q=
 github.com/kisielk/gotool v1.0.0/go.mod h1:XhKaO+MFFWcvkIS/tQcRk01m1F5IRFswLeQ+oQHNcck=
 github.com/kkdai/bstream v0.0.0-20161212061736-f391b8402d23/go.mod h1:J+Gs4SYgM6CZQHDETBtE9HaSEkGmuNXF86RwHhHUvq4=
+github.com/konsorten/go-windows-terminal-sequences v1.0.3/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
 github.com/koron/go-ssdp v0.0.0-20180514024734-4a0ed625a78b/go.mod h1:5Ky9EC2xfoUKUor0Hjgi2BJhCSXJfMOFlmyYrVKGQMk=
 github.com/kr/logfmt v0.0.0-20140226030751-b84e30acd515/go.mod h1:+0opPa2QZZtGFBFZlji/RkVcI2GknAs/DXo4wKdlNEc=
 github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo=
@@ -291,15 +305,19 @@ github.com/prometheus/common v0.0.0-20181113130724-41aa239b4cce/go.mod h1:daVV7q
 github.com/prometheus/procfs v0.0.0-20181005140218-185b4288413d/go.mod h1:c3At6R/oaqEKCNdg8wHV1ftS6bRYblBhIjjI8uT2IGk=
 github.com/prometheus/tsdb v0.6.2-0.20190402121629-4f204dcbc150/go.mod h1:qhTCs0VvXwvX/y3TZrWD7rabWM+ijKTux40TwIPHuXU=
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 github.com/rs/cors v0.0.0-20160617231935-a62a804a8a00/go.mod h1:gFx+x8UowdsKA9AchylcLynDq+nNFfI8FkUZdN/jGCU=
 github.com/rs/xhandler v0.0.0-20160618193221-ed27b6fd6521/go.mod h1:RvLn4FgxWubrpZHtQLnOf6EwhN2hEMusxZOhcW9H3UQ=
 github.com/russross/blackfriday/v2 v2.0.1/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
 github.com/shirou/gopsutil v2.20.5-0.20200531151128-663af789c085+incompatible h1:+gAR1bMhuoQnZMTWFIvp7ukynULPsteLzG+siZKLtD8=
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 github.com/spacemonkeygo/spacelog v0.0.0-20180420211403-2296661a0572/go.mod h1:w0SWMsp6j9O/dk4/ZpIhL+3CkG8ofA2vuv7k+ltqUMc=
 github.com/spaolacci/murmur3 v0.0.0-20180118202830-f09979ecbc72/go.mod h1:JwIasOWyU6f++ZhiEuf87xNszmSA2myDM2Kzu9HwQUA=
+github.com/spaolacci/murmur3 v1.0.1-0.20190317074736-539464a789e9/go.mod h1:JwIasOWyU6f++ZhiEuf87xNszmSA2myDM2Kzu9HwQUA=
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@@ -330,6 +348,7 @@ golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACk
 golang.org/x/crypto v0.0.0-20190426145343-a29dc8fdc734/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
 golang.org/x/crypto v0.0.0-20190513172903-22d7a77e9e5f/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
 golang.org/x/crypto v0.0.0-20190530122614-20be4c3c3ed5/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
+golang.org/x/crypto v0.0.0-20190611184440-5c40567a22f8 h1:1wopBVtVdWnn03fZelqdXTqk7U7zPQCb+T4rbU9ZEoU=
 golang.org/x/crypto v0.0.0-20190611184440-5c40567a22f8/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
 golang.org/x/crypto v0.0.0-20200311171314-f7b00557c8c4 h1:QmwruyY+bKbDDL0BaglrbZABEali68eoMFhTZpCjYVA=
 golang.org/x/crypto v0.0.0-20200311171314-f7b00557c8c4/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
@@ -338,6 +357,8 @@ golang.org/x/net v0.0.0-20181011144130-49bb7cea24b1/go.mod h1:mL1N/T3taQHkDXs73r
 golang.org/x/net v0.0.0-20190227160552-c95aed5357e7/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
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+golang.org/x/net v0.0.0-20190628185345-da137c7871d7 h1:rTIdg5QFRR7XCaK4LCjBiPbx8j4DQRpdYMnGn/bJUEU=
+golang.org/x/net v0.0.0-20190628185345-da137c7871d7/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20200425230154-ff2c4b7c35a0 h1:Jcxah/M+oLZ/R4/z5RzfPzGbPXnVDPkEDtf2JnuxN+U=
 golang.org/x/net v0.0.0-20200425230154-ff2c4b7c35a0/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A=
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@@ -349,7 +370,10 @@ golang.org/x/sys v0.0.0-20190219092855-153ac476189d/go.mod h1:STP8DvDyc/dI5b8T5h
 golang.org/x/sys v0.0.0-20190222072716-a9d3bda3a223/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
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+golang.org/x/sys v0.0.0-20190422165155-953cdadca894/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
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@@ -367,7 +391,9 @@ gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8
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 gopkg.in/natefinch/npipe.v2 v2.0.0-20160621034901-c1b8fa8bdcce/go.mod h1:5AcXVHNjg+BDxry382+8OKon8SEWiKktQR07RKPsv1c=
+gopkg.in/olebedev/go-duktape.v3 v3.0.0-20190213234257-ec84240a7772/go.mod h1:uAJfkITjFhyEEuUfm7bsmCZRbW5WRq8s9EY8HZ6hCns=
 gopkg.in/olebedev/go-duktape.v3 v3.0.0-20200603215123-a4a8cb9d2cbc/go.mod h1:uAJfkITjFhyEEuUfm7bsmCZRbW5WRq8s9EY8HZ6hCns=
+gopkg.in/sourcemap.v1 v1.0.5/go.mod h1:2RlvNNSMglmRrcvhfuzp4hQHwOtjxlbjX7UPY/GXb78=
 gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7 h1:uRGJdciOHaEIrze2W8Q3AKkepLTh2hOroT7a+7czfdQ=
 gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7/go.mod h1:dt/ZhP58zS4L8KSrWDmTeBkI65Dw0HsyUHuEVlX15mw=
 gopkg.in/urfave/cli.v1 v1.20.0/go.mod h1:vuBzUtMdQeixQj8LVd+/98pzhxNGQoyuPBlsXHOQNO0=

postgres/ancient.go

@@ -0,0 +1,238 @@
+// VulcanizeDB
+// Copyright © 2020 Vulcanize
+
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// This program 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 Affero General Public License for more details.
+
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+package pgipfsethdb
+
+import (
+	"database/sql"
+	"fmt"
+
+	"github.com/sirupsen/logrus"
+)
+
+const (
+	// FreezerHeaderTable indicates the name of the freezer header table.
+	FreezerHeaderTable = "headers"
+
+	// FreezerHashTable indicates the name of the freezer canonical hash table.
+	FreezerHashTable = "hashes"
+
+	// FreezerBodiesTable indicates the name of the freezer block body table.
+	FreezerBodiesTable = "bodies"
+
+	// FreezerReceiptTable indicates the name of the freezer receipts table.
+	FreezerReceiptTable = "receipts"
+
+	// FreezerDifficultyTable indicates the name of the freezer total difficulty table.
+	FreezerDifficultyTable = "diffs"
+
+	// ancient append Postgres statements
+	appendAncientHeaderPgStr   = "INSERT INTO eth.ancient_headers (block_number, header) VALUES ($1, $2) ON CONFLICT (block_number) DO UPDATE SET header = $2"
+	appendAncientHashPgStr     = "INSERT INTO eth.ancient_hashes (block_number, hash) VALUES ($1, $2) ON CONFLICT (block_number) DO UPDATE SET hash = $2"
+	appendAncientBodyPgStr     = "INSERT INTO eth.ancient_bodies (block_number, body) VALUES ($1, $2) ON CONFLICT (block_number) DO UPDATE SET body = $2"
+	appendAncientReceiptsPgStr = "INSERT INTO eth.ancient_receipts (block_number, receipts) VALUES ($1, $2) ON CONFLICT (block_number) DO UPDATE SET receipts = $2"
+	appendAncientTDPgStr       = "INSERT INTO eth.ancient_tds (block_number, td) VALUES ($1, $2) ON CONFLICT (block_number) DO UPDATE SET td = $2"
+
+	// ancient truncate Postgres statements
+	truncateAncientHeaderPgStr   = "DELETE FROM eth.ancient_headers WHERE block_number > $1"
+	truncateAncientHashPgStr     = "DELETE FROM eth.ancient_hashes WHERE block_number > $1"
+	truncateAncientBodiesPgStr   = "DELETE FROM eth.ancient_bodies WHERE block_number > $1"
+	truncateAncientReceiptsPgStr = "DELETE FROM eth.ancient_receipts WHERE block_number > $1"
+	truncateAncientTDPgStr       = "DELETE FROM eth.ancient_tds WHERE block_number > $1"
+
+	// ancient size Postgres statement
+	ancientSizePgStr = "SELECT pg_total_relation_size($1)"
+
+	// ancients Postgres statement
+	ancientsPgStr = "SELECT block_number FROM eth.ancient_headers ORDER BY block_number DESC LIMIT 1"
+
+	// ancient has Postgres statements
+	hasAncientHeaderPgStr   = "SELECT exists(SELECT 1 FROM eth.ancient_headers WHERE block_number = $1)"
+	hasAncientHashPgStr     = "SELECT exists(SELECT 1 FROM eth.ancient_hashes WHERE block_number = $1)"
+	hasAncientBodyPgStr     = "SELECT exists(SELECT 1 FROM eth.ancient_bodies WHERE block_number = $1)"
+	hasAncientReceiptsPgStr = "SELECT exists(SELECT 1 FROM eth.ancient_receipts WHERE block_number = $1)"
+	hasAncientTDPgStr       = "SELECT exists(SELECT 1 FROM eth.ancient_tds WHERE block_number = $1)"
+
+	// ancient get Postgres statements
+	getAncientHeaderPgStr   = "SELECT header FROM eth.ancient_headers WHERE block_number = $1"
+	getAncientHashPgStr     = "SELECT hash FROM eth.ancient_hashes WHERE block_number = $1"
+	getAncientBodyPgStr     = "SELECT body FROM eth.ancient_bodies WHERE block_number = $1"
+	getAncientReceiptsPgStr = "SELECT receipts FROM eth.ancient_receipts WHERE block_number = $1"
+	getAncientTDPgStr       = "SELECT td FROM eth.ancient_tds WHERE block_number = $1"
+)
+
+// HasAncient satisfies the ethdb.AncientReader interface
+// HasAncient returns an indicator whether the specified data exists in the ancient store
+func (d *Database) HasAncient(kind string, number uint64) (bool, error) {
+	var pgStr string
+	switch kind {
+	case FreezerHeaderTable:
+		pgStr = hasAncientHeaderPgStr
+	case FreezerHashTable:
+		pgStr = hasAncientHashPgStr
+	case FreezerBodiesTable:
+		pgStr = hasAncientBodyPgStr
+	case FreezerReceiptTable:
+		pgStr = hasAncientReceiptsPgStr
+	case FreezerDifficultyTable:
+		pgStr = hasAncientTDPgStr
+	default:
+		return false, fmt.Errorf("unexpected ancient kind: %s", kind)
+	}
+	has := new(bool)
+	return *has, d.db.Get(has, pgStr, number)
+}
+
+// Ancient satisfies the ethdb.AncientReader interface
+// Ancient retrieves an ancient binary blob from the append-only immutable files
+func (d *Database) Ancient(kind string, number uint64) ([]byte, error) {
+	var pgStr string
+	switch kind {
+	case FreezerHeaderTable:
+		pgStr = getAncientHeaderPgStr
+	case FreezerHashTable:
+		pgStr = getAncientHashPgStr
+	case FreezerBodiesTable:
+		pgStr = getAncientBodyPgStr
+	case FreezerReceiptTable:
+		pgStr = getAncientReceiptsPgStr
+	case FreezerDifficultyTable:
+		pgStr = getAncientTDPgStr
+	default:
+		return nil, fmt.Errorf("unexpected ancient kind: %s", kind)
+	}
+	data := new([]byte)
+	return *data, d.db.Get(data, pgStr, number)
+}
+
+// Ancients satisfies the ethdb.AncientReader interface
+// Ancients returns the ancient item numbers in the ancient store
+func (d *Database) Ancients() (uint64, error) {
+	num := new(uint64)
+	if err := d.db.Get(num, ancientsPgStr); err != nil {
+		if err == sql.ErrNoRows {
+			return 0, nil
+		}
+		return 0, err
+	}
+	return *num, nil
+}
+
+// AncientSize satisfies the ethdb.AncientReader interface
+// AncientSize returns the ancient size of the specified category
+func (d *Database) AncientSize(kind string) (uint64, error) {
+	var tableName string
+	switch kind {
+	case FreezerHeaderTable:
+		tableName = "eth.ancient_headers"
+	case FreezerHashTable:
+		tableName = "eth.ancient_hashes"
+	case FreezerBodiesTable:
+		tableName = "eth.ancient_bodies"
+	case FreezerReceiptTable:
+		tableName = "eth.ancient_receipts"
+	case FreezerDifficultyTable:
+		tableName = "eth.ancient_tds"
+	default:
+		return 0, fmt.Errorf("unexpected ancient kind: %s", kind)
+	}
+	size := new(uint64)
+	return *size, d.db.Get(size, ancientSizePgStr, tableName)
+}
+
+// AppendAncient satisfies the ethdb.AncientWriter interface
+// AppendAncient injects all binary blobs belong to block at the end of the append-only immutable table files
+func (d *Database) AppendAncient(number uint64, hash, header, body, receipts, td []byte) error {
+	// append in batch
+	var err error
+	if d.ancientTx == nil {
+		d.ancientTx, err = d.db.Beginx()
+		if err != nil {
+			return err
+		}
+	}
+	defer func() {
+		if err != nil {
+			if err := d.ancientTx.Rollback(); err != nil {
+				logrus.Error(err)
+				d.ancientTx = nil
+			}
+		}
+	}()
+
+	if _, err := d.ancientTx.Exec(appendAncientHashPgStr, number, hash); err != nil {
+		return err
+	}
+	if _, err := d.ancientTx.Exec(appendAncientHeaderPgStr, number, header); err != nil {
+		return err
+	}
+	if _, err := d.ancientTx.Exec(appendAncientBodyPgStr, number, body); err != nil {
+		return err
+	}
+	if _, err := d.ancientTx.Exec(appendAncientReceiptsPgStr, number, receipts); err != nil {
+		return err
+	}
+	_, err = d.ancientTx.Exec(appendAncientTDPgStr, number, td)
+	return err
+}
+
+// TruncateAncients satisfies the ethdb.AncientWriter interface
+// TruncateAncients discards all but the first n ancient data from the ancient store
+func (d *Database) TruncateAncients(n uint64) error {
+	// truncate in batch
+	var err error
+	if d.ancientTx == nil {
+		d.ancientTx, err = d.db.Beginx()
+		if err != nil {
+			return err
+		}
+	}
+	defer func() {
+		if err != nil {
+			if err := d.ancientTx.Rollback(); err != nil {
+				logrus.Error(err)
+				d.ancientTx = nil
+			}
+		}
+	}()
+	if _, err := d.ancientTx.Exec(truncateAncientHeaderPgStr, n); err != nil {
+		return err
+	}
+	if _, err := d.ancientTx.Exec(truncateAncientHashPgStr, n); err != nil {
+		return err
+	}
+	if _, err := d.ancientTx.Exec(truncateAncientBodiesPgStr, n); err != nil {
+		return err
+	}
+	if _, err := d.ancientTx.Exec(truncateAncientReceiptsPgStr, n); err != nil {
+		return err
+	}
+	_, err = d.ancientTx.Exec(truncateAncientTDPgStr, n)
+	return err
+}
+
+// Sync satisfies the ethdb.AncientWriter interface
+// Sync flushes all in-memory ancient store data to disk
+func (d *Database) Sync() error {
+	if d.ancientTx == nil {
+		return nil
+	}
+	if err := d.ancientTx.Commit(); err != nil {
+		return err
+	}
+	d.ancientTx = nil
+	return nil
+}

postgres/ancient_test.go

@@ -0,0 +1,232 @@
+// VulcanizeDB
+// Copyright © 2019 Vulcanize
+
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// This program 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 Affero General Public License for more details.
+
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+package pgipfsethdb_test
+
+import (
+	"math/big"
+
+	"github.com/ethereum/go-ethereum/core/types"
+	"github.com/ethereum/go-ethereum/ethdb"
+	"github.com/ethereum/go-ethereum/rlp"
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+
+	"github.com/vulcanize/ipfs-ethdb/postgres"
+)
+
+var (
+	ancientDB                ethdb.Database
+	testBlockNumber          uint64 = 1
+	testAncientHeader               = types.Header{Number: big.NewInt(2)}
+	testAncientHeaderRLP, _         = rlp.EncodeToBytes(testHeader2)
+	testAncientHash                 = testAncientHeader.Hash().Bytes()
+	testAncientBodyBytes            = make([]byte, 10000)
+	testAncientReceiptsBytes        = make([]byte, 5000)
+	testAncientTD, _                = new(big.Int).SetString("1000000000000000000000", 10)
+	testAncientTDBytes              = testAncientTD.Bytes()
+)
+
+var _ = Describe("Ancient", func() {
+	BeforeEach(func() {
+		db, err = pgipfsethdb.TestDB()
+		Expect(err).ToNot(HaveOccurred())
+		ancientDB = pgipfsethdb.NewDatabase(db)
+
+	})
+	AfterEach(func() {
+		err = pgipfsethdb.ResetTestDB(db)
+		Expect(err).ToNot(HaveOccurred())
+	})
+
+	Describe("AppendAncient/Sync/Has", func() {
+		It("adds eth objects to the Ancient database and returns whether or not an ancient record exists", func() {
+			hasAncient(testBlockNumber, false)
+
+			err = ancientDB.AppendAncient(testBlockNumber, testAncientHash, testAncientHeaderRLP, testAncientBodyBytes, testAncientReceiptsBytes, testAncientTDBytes)
+			Expect(err).ToNot(HaveOccurred())
+
+			hasAncient(testBlockNumber, false)
+
+			err = ancientDB.Sync()
+			Expect(err).ToNot(HaveOccurred())
+
+			hasAncient(testBlockNumber, true)
+		})
+	})
+
+	Describe("AppendAncient/Sync/Ancient", func() {
+		It("adds the eth objects to the Ancient database and returns the ancient objects on request", func() {
+			hasAncient(testBlockNumber, false)
+
+			_, err := ancientDB.Ancient(pgipfsethdb.FreezerHeaderTable, testBlockNumber)
+			Expect(err).To(HaveOccurred())
+			_, err = ancientDB.Ancient(pgipfsethdb.FreezerHashTable, testBlockNumber)
+			Expect(err).To(HaveOccurred())
+			_, err = ancientDB.Ancient(pgipfsethdb.FreezerBodiesTable, testBlockNumber)
+			Expect(err).To(HaveOccurred())
+			_, err = ancientDB.Ancient(pgipfsethdb.FreezerReceiptTable, testBlockNumber)
+			Expect(err).To(HaveOccurred())
+			_, err = ancientDB.Ancient(pgipfsethdb.FreezerDifficultyTable, testBlockNumber)
+			Expect(err).To(HaveOccurred())
+
+			err = ancientDB.AppendAncient(testBlockNumber, testAncientHash, testAncientHeaderRLP, testAncientBodyBytes, testAncientReceiptsBytes, testAncientTDBytes)
+			Expect(err).ToNot(HaveOccurred())
+			err = ancientDB.Sync()
+			Expect(err).ToNot(HaveOccurred())
+
+			hasAncient(testBlockNumber, true)
+
+			ancientHeader, err := ancientDB.Ancient(pgipfsethdb.FreezerHeaderTable, testBlockNumber)
+			Expect(err).ToNot(HaveOccurred())
+			Expect(ancientHeader).To(Equal(testAncientHeaderRLP))
+
+			ancientHash, err := ancientDB.Ancient(pgipfsethdb.FreezerHashTable, testBlockNumber)
+			Expect(err).ToNot(HaveOccurred())
+			Expect(ancientHash).To(Equal(testAncientHash))
+
+			ancientBody, err := ancientDB.Ancient(pgipfsethdb.FreezerBodiesTable, testBlockNumber)
+			Expect(err).ToNot(HaveOccurred())
+			Expect(ancientBody).To(Equal(testAncientBodyBytes))
+
+			ancientReceipts, err := ancientDB.Ancient(pgipfsethdb.FreezerReceiptTable, testBlockNumber)
+			Expect(err).ToNot(HaveOccurred())
+			Expect(ancientReceipts).To(Equal(testAncientReceiptsBytes))
+
+			ancientTD, err := ancientDB.Ancient(pgipfsethdb.FreezerDifficultyTable, testBlockNumber)
+			Expect(err).ToNot(HaveOccurred())
+			Expect(ancientTD).To(Equal(testAncientTDBytes))
+		})
+	})
+
+	Describe("AppendAncient/Sync/Ancients", func() {
+		It("returns the height of the ancient database", func() {
+			ancients, err := ancientDB.Ancients()
+			Expect(err).ToNot(HaveOccurred())
+			Expect(ancients).To(Equal(uint64(0)))
+
+			for i := uint64(0); i <= 100; i++ {
+				hasAncient(i, false)
+				err = ancientDB.AppendAncient(i, testAncientHash, testAncientHeaderRLP, testAncientBodyBytes, testAncientReceiptsBytes, testAncientTDBytes)
+				Expect(err).ToNot(HaveOccurred())
+			}
+
+			err = ancientDB.Sync()
+			Expect(err).ToNot(HaveOccurred())
+
+			for i := uint64(0); i <= 100; i++ {
+				hasAncient(i, true)
+			}
+			ancients, err = ancientDB.Ancients()
+			Expect(err).ToNot(HaveOccurred())
+			Expect(ancients).To(Equal(uint64(100)))
+		})
+	})
+
+	Describe("AppendAncient/Truncate/Sync", func() {
+		It("truncates the ancient database to the provided height", func() {
+			for i := uint64(0); i <= 100; i++ {
+				hasAncient(i, false)
+				err = ancientDB.AppendAncient(i, testAncientHash, testAncientHeaderRLP, testAncientBodyBytes, testAncientReceiptsBytes, testAncientTDBytes)
+				Expect(err).ToNot(HaveOccurred())
+			}
+
+			err = ancientDB.Sync()
+			Expect(err).ToNot(HaveOccurred())
+
+			err = ancientDB.TruncateAncients(50)
+			Expect(err).ToNot(HaveOccurred())
+
+			for i := uint64(0); i <= 100; i++ {
+				hasAncient(i, true)
+			}
+
+			ancients, err := ancientDB.Ancients()
+			Expect(err).ToNot(HaveOccurred())
+			Expect(ancients).To(Equal(uint64(100)))
+
+			err = ancientDB.Sync()
+			Expect(err).ToNot(HaveOccurred())
+
+			for i := uint64(0); i <= 100; i++ {
+				if i <= 50 {
+					hasAncient(i, true)
+				} else {
+					hasAncient(i, false)
+				}
+			}
+
+			ancients, err = ancientDB.Ancients()
+			Expect(err).ToNot(HaveOccurred())
+			Expect(ancients).To(Equal(uint64(50)))
+		})
+	})
+
+	Describe("AppendAncient/Sync/AncientSize", func() {
+		It("adds the eth objects to the Ancient database and returns the ancient objects on request", func() {
+			for i := uint64(0); i <= 100; i++ {
+				hasAncient(i, false)
+				err = ancientDB.AppendAncient(i, testAncientHash, testAncientHeaderRLP, testAncientBodyBytes, testAncientReceiptsBytes, testAncientTDBytes)
+				Expect(err).ToNot(HaveOccurred())
+			}
+
+			err = ancientDB.Sync()
+			Expect(err).ToNot(HaveOccurred())
+
+			for i := uint64(0); i <= 100; i++ {
+				hasAncient(i, true)
+			}
+
+			ancientHeaderSize, err := ancientDB.AncientSize(pgipfsethdb.FreezerHeaderTable)
+			Expect(err).ToNot(HaveOccurred())
+			Expect(ancientHeaderSize).To(Equal(uint64(106496)))
+
+			ancientHashSize, err := ancientDB.AncientSize(pgipfsethdb.FreezerHashTable)
+			Expect(err).ToNot(HaveOccurred())
+			Expect(ancientHashSize).To(Equal(uint64(32768)))
+
+			ancientBodySize, err := ancientDB.AncientSize(pgipfsethdb.FreezerBodiesTable)
+			Expect(err).ToNot(HaveOccurred())
+			Expect(ancientBodySize).To(Equal(uint64(73728)))
+
+			ancientReceiptsSize, err := ancientDB.AncientSize(pgipfsethdb.FreezerReceiptTable)
+			Expect(err).ToNot(HaveOccurred())
+			Expect(ancientReceiptsSize).To(Equal(uint64(65536)))
+
+			ancientTDSize, err := ancientDB.AncientSize(pgipfsethdb.FreezerDifficultyTable)
+			Expect(err).ToNot(HaveOccurred())
+			Expect(ancientTDSize).To(Equal(uint64(32768)))
+		})
+	})
+})
+
+func hasAncient(blockNumber uint64, shouldHave bool) {
+	has, err := ancientDB.HasAncient(pgipfsethdb.FreezerHeaderTable, blockNumber)
+	Expect(err).ToNot(HaveOccurred())
+	Expect(has).To(Equal(shouldHave))
+	has, err = ancientDB.HasAncient(pgipfsethdb.FreezerHashTable, blockNumber)
+	Expect(err).ToNot(HaveOccurred())
+	Expect(has).To(Equal(shouldHave))
+	has, err = ancientDB.HasAncient(pgipfsethdb.FreezerBodiesTable, blockNumber)
+	Expect(err).ToNot(HaveOccurred())
+	Expect(has).To(Equal(shouldHave))
+	has, err = ancientDB.HasAncient(pgipfsethdb.FreezerReceiptTable, blockNumber)
+	Expect(err).ToNot(HaveOccurred())
+	Expect(has).To(Equal(shouldHave))
+	has, err = ancientDB.HasAncient(pgipfsethdb.FreezerDifficultyTable, blockNumber)
+	Expect(err).ToNot(HaveOccurred())
+	Expect(has).To(Equal(shouldHave))
+}

postgres/batch.go

@@ -17,6 +17,7 @@
 package pgipfsethdb
 
 import (
+	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/ethdb"
 	"github.com/jmoiron/sqlx"
 )
@@ -26,6 +27,7 @@ type Batch struct {
 	db          *sqlx.DB
 	tx          *sqlx.Tx
 	valueSize   int
+	replayCache map[string][]byte
 }
 
 // NewBatch returns a ethdb.Batch interface for PG-IPFS
@@ -33,6 +35,7 @@ func NewBatch(db *sqlx.DB, tx *sqlx.Tx) ethdb.Batch {
 	b := &Batch{
 		db:          db,
 		tx:          tx,
+		replayCache: make(map[string][]byte),
 	}
 	if tx == nil {
 		b.Reset()
@@ -44,26 +47,30 @@ func NewBatch(db *sqlx.DB, tx *sqlx.Tx) ethdb.Batch {
 // Put inserts the given value into the key-value data store
 // Key is expected to be the keccak256 hash of value
 func (b *Batch) Put(key []byte, value []byte) (err error) {
-	mhKey, err := MultihashKeyFromKeccak256(key)
+	dsKey, prefix, err := DatastoreKeyFromGethKey(key)
 	if err != nil {
 		return err
 	}
-	if _, err = b.tx.Exec(putPgStr, mhKey, value); err != nil {
+	if _, err = b.tx.Exec(putPgStr, dsKey, value); err != nil {
+		return err
+	}
+	if _, err = b.tx.Exec(putPreimagePgStr, key, dsKey, prefix); err != nil {
 		return err
 	}
 	b.valueSize += len(value)
+	b.replayCache[common.Bytes2Hex(key)] = value
 	return nil
 }
 
 // Delete satisfies the ethdb.Batch interface
 // Delete removes the key from the key-value data store
 func (b *Batch) Delete(key []byte) (err error) {
-	mhKey, err := MultihashKeyFromKeccak256(key)
+	_, err = b.tx.Exec(deletePgStr, key)
 	if err != nil {
 		return err
 	}
-	_, err = b.tx.Exec(deletePgStr, mhKey)
+	delete(b.replayCache, common.Bytes2Hex(key))
-	return err
+	return nil
 }
 
 // ValueSize satisfies the ethdb.Batch interface
@@ -75,17 +82,32 @@ func (b *Batch) ValueSize() int {
 
 // Write satisfies the ethdb.Batch interface
 // Write flushes any accumulated data to disk
+// Reset should be called after every write
 func (b *Batch) Write() error {
 	if b.tx == nil {
 		return nil
 	}
-	return b.tx.Commit()
+	if err := b.tx.Commit(); err != nil {
+		return err
+	}
+	b.replayCache = nil
+	return nil
 }
 
 // Replay satisfies the ethdb.Batch interface
 // Replay replays the batch contents
 func (b *Batch) Replay(w ethdb.KeyValueWriter) error {
-	return errNotSupported
+	if b.tx != nil {
+		b.tx.Rollback()
+		b.tx = nil
+	}
+	for key, value := range b.replayCache {
+		if err := w.Put(common.Hex2Bytes(key), value); err != nil {
+			return err
+		}
+	}
+	b.replayCache = nil
+	return nil
 }
 
 // Reset satisfies the ethdb.Batch interface
@@ -97,5 +119,6 @@ func (b *Batch) Reset() {
 	if err != nil {
 		panic(err)
 	}
+	b.replayCache = make(map[string][]byte)
 	b.valueSize = 0
 }

postgres/batch_test.go

@@ -32,7 +32,7 @@ var (
 	batch             ethdb.Batch
 	testHeader2       = types.Header{Number: big.NewInt(2)}
 	testValue2, _     = rlp.EncodeToBytes(testHeader2)
-	testEthKey2   = testHeader2.Hash().Bytes()
+	testKeccakEthKey2 = testHeader2.Hash().Bytes()
 )
 
 var _ = Describe("Batch", func() {
@@ -49,24 +49,24 @@ var _ = Describe("Batch", func() {
 
 	Describe("Put/Write", func() {
 		It("adds the key-value pair to the batch", func() {
-			_, err = database.Get(testEthKey)
+			_, err = database.Get(testKeccakEthKey)
 			Expect(err).To(HaveOccurred())
 			Expect(err.Error()).To(ContainSubstring("sql: no rows in result set"))
-			_, err = database.Get(testEthKey2)
+			_, err = database.Get(testKeccakEthKey2)
 			Expect(err).To(HaveOccurred())
 			Expect(err.Error()).To(ContainSubstring("sql: no rows in result set"))
 
-			err = batch.Put(testEthKey, testValue)
+			err = batch.Put(testKeccakEthKey, testValue)
 			Expect(err).ToNot(HaveOccurred())
-			err = batch.Put(testEthKey2, testValue2)
+			err = batch.Put(testKeccakEthKey2, testValue2)
 			Expect(err).ToNot(HaveOccurred())
 			err = batch.Write()
 			Expect(err).ToNot(HaveOccurred())
 
-			val, err := database.Get(testEthKey)
+			val, err := database.Get(testKeccakEthKey)
 			Expect(err).ToNot(HaveOccurred())
 			Expect(val).To(Equal(testValue))
-			val2, err := database.Get(testEthKey2)
+			val2, err := database.Get(testKeccakEthKey2)
 			Expect(err).ToNot(HaveOccurred())
 			Expect(val2).To(Equal(testValue2))
 		})
@@ -74,25 +74,25 @@ var _ = Describe("Batch", func() {
 
 	Describe("Delete/Reset/Write", func() {
 		It("deletes the key-value pair in the batch", func() {
-			err = batch.Put(testEthKey, testValue)
+			err = batch.Put(testKeccakEthKey, testValue)
 			Expect(err).ToNot(HaveOccurred())
-			err = batch.Put(testEthKey2, testValue2)
+			err = batch.Put(testKeccakEthKey2, testValue2)
 			Expect(err).ToNot(HaveOccurred())
 			err = batch.Write()
 			Expect(err).ToNot(HaveOccurred())
 
 			batch.Reset()
-			err = batch.Delete(testEthKey)
+			err = batch.Delete(testKeccakEthKey)
 			Expect(err).ToNot(HaveOccurred())
-			err = batch.Delete(testEthKey2)
+			err = batch.Delete(testKeccakEthKey2)
 			Expect(err).ToNot(HaveOccurred())
 			err = batch.Write()
 			Expect(err).ToNot(HaveOccurred())
 
-			_, err = database.Get(testEthKey)
+			_, err = database.Get(testKeccakEthKey)
 			Expect(err).To(HaveOccurred())
 			Expect(err.Error()).To(ContainSubstring("sql: no rows in result set"))
-			_, err = database.Get(testEthKey2)
+			_, err = database.Get(testKeccakEthKey2)
 			Expect(err).To(HaveOccurred())
 			Expect(err.Error()).To(ContainSubstring("sql: no rows in result set"))
 		})
@@ -100,9 +100,9 @@ var _ = Describe("Batch", func() {
 
 	Describe("ValueSize/Reset", func() {
 		It("returns the size of data in the batch queued for write", func() {
-			err = batch.Put(testEthKey, testValue)
+			err = batch.Put(testKeccakEthKey, testValue)
 			Expect(err).ToNot(HaveOccurred())
-			err = batch.Put(testEthKey2, testValue2)
+			err = batch.Put(testKeccakEthKey2, testValue2)
 			Expect(err).ToNot(HaveOccurred())
 			err = batch.Write()
 			Expect(err).ToNot(HaveOccurred())
@@ -115,4 +115,30 @@ var _ = Describe("Batch", func() {
 			Expect(size).To(Equal(0))
 		})
 	})
+
+	Describe("Replay", func() {
+		It("returns the size of data in the batch queued for write", func() {
+			err = batch.Put(testKeccakEthKey, testValue)
+			Expect(err).ToNot(HaveOccurred())
+			err = batch.Put(testKeccakEthKey2, testValue2)
+			Expect(err).ToNot(HaveOccurred())
+
+			_, err = database.Get(testKeccakEthKey)
+			Expect(err).To(HaveOccurred())
+			Expect(err.Error()).To(ContainSubstring("sql: no rows in result set"))
+			_, err = database.Get(testKeccakEthKey2)
+			Expect(err).To(HaveOccurred())
+			Expect(err.Error()).To(ContainSubstring("sql: no rows in result set"))
+
+			err = batch.Replay(database)
+			Expect(err).ToNot(HaveOccurred())
+
+			val, err := database.Get(testKeccakEthKey)
+			Expect(err).ToNot(HaveOccurred())
+			Expect(val).To(Equal(testValue))
+			val2, err := database.Get(testKeccakEthKey2)
+			Expect(err).ToNot(HaveOccurred())
+			Expect(val2).To(Equal(testValue2))
+		})
+	})
 })

postgres/database.go

@@ -17,27 +17,28 @@
 package pgipfsethdb
 
 import (
-	"errors"
 	"fmt"
 	"strings"
 
+	"github.com/sirupsen/logrus"
+
 	"github.com/ethereum/go-ethereum/ethdb"
 	"github.com/jmoiron/sqlx"
 )
 
-var errNotSupported = errors.New("this operation is not supported")
+const (
-
+	hasPgStr         = "SELECT exists(SELECT 1 FROM eth.key_preimages WHERE eth_key = $1)"
-var (
+	getPgStr         = "SELECT data FROM public.blocks INNER JOIN eth.key_preimages ON (ipfs_key = blocks.key) WHERE eth_key = $1"
-	hasPgStr    = "SELECT exists(select 1 from public.blocks WHERE key = $1)"
-	getPgStr    = "SELECT data FROM public.blocks WHERE key = $1"
 	putPgStr         = "INSERT INTO public.blocks (key, data) VALUES ($1, $2) ON CONFLICT (key) DO NOTHING"
-	deletePgStr = "DELETE FROM public.blocks WHERE key = $1"
+	putPreimagePgStr = "INSERT INTO eth.key_preimages (eth_key, ipfs_key, prefix) VALUES ($1, $2, $3) ON CONFLICT (eth_key) DO UPDATE SET (ipfs_key, prefix) = ($2, $3)"
+	deletePgStr      = "DELETE FROM public.blocks USING eth.key_preimages WHERE ipfs_key = blocks.key AND eth_key = $1"
 	dbSizePgStr      = "SELECT pg_database_size(current_database())"
 )
 
 // Database is the type that satisfies the ethdb.Database and ethdb.KeyValueStore interfaces for PG-IPFS Ethereum data using a direct Postgres connection
 type Database struct {
 	db        *sqlx.DB
+	ancientTx *sqlx.Tx
 }
 
 // NewKeyValueStore returns a ethdb.KeyValueStore interface for PG-IPFS
@@ -56,46 +57,54 @@ func NewDatabase(db *sqlx.DB) ethdb.Database {
 
 // Has satisfies the ethdb.KeyValueReader interface
 // Has retrieves if a key is present in the key-value data store
+// Has uses the eth.key_preimages table
 func (d *Database) Has(key []byte) (bool, error) {
-	mhKey, err := MultihashKeyFromKeccak256(key)
-	if err != nil {
-		return false, err
-	}
 	var exists bool
-	return exists, d.db.Get(&exists, hasPgStr, mhKey)
+	return exists, d.db.Get(&exists, hasPgStr, key)
 }
 
 // Get satisfies the ethdb.KeyValueReader interface
 // Get retrieves the given key if it's present in the key-value data store
+// Get uses the eth.key_preimages table
 func (d *Database) Get(key []byte) ([]byte, error) {
-	mhKey, err := MultihashKeyFromKeccak256(key)
-	if err != nil {
-		return nil, err
-	}
 	var data []byte
-	return data, d.db.Get(&data, getPgStr, mhKey)
+	return data, d.db.Get(&data, getPgStr, key)
 }
 
 // Put satisfies the ethdb.KeyValueWriter interface
 // Put inserts the given value into the key-value data store
 // Key is expected to be the keccak256 hash of value
+// Put inserts the keccak256 key into the eth.key_preimages table
 func (d *Database) Put(key []byte, value []byte) error {
-	mhKey, err := MultihashKeyFromKeccak256(key)
+	dsKey, prefix, err := DatastoreKeyFromGethKey(key)
 	if err != nil {
 		return err
 	}
-	_, err = d.db.Exec(putPgStr, mhKey, value)
+	tx, err := d.db.Beginx()
+	if err != nil {
+		return err
+	}
+	defer func() {
+		if err != nil {
+			if err := tx.Rollback(); err != nil {
+				logrus.Error(err)
+			}
+		} else {
+			err = tx.Commit()
+		}
+	}()
+	if _, err = tx.Exec(putPgStr, dsKey, value); err != nil {
+		return err
+	}
+	_, err = tx.Exec(putPreimagePgStr, key, dsKey, prefix)
 	return err
 }
 
 // Delete satisfies the ethdb.KeyValueWriter interface
 // Delete removes the key from the key-value data store
+// Delete uses the eth.key_preimages table
 func (d *Database) Delete(key []byte) error {
-	mhKey, err := MultihashKeyFromKeccak256(key)
+	_, err := d.db.Exec(deletePgStr, key)
-	if err != nil {
-		return err
-	}
-	_, err = d.db.Exec(deletePgStr, mhKey)
 	return err
 }
 
@@ -176,7 +185,8 @@ func (d *Database) Stat(property string) (string, error) {
 // Compact satisfies the ethdb.Compacter interface
 // Compact flattens the underlying data store for the given key range
 func (d *Database) Compact(start []byte, limit []byte) error {
-	return errNotSupported
+	// this leveldb functionality doesn't translate to Postgres
+	return nil
 }
 
 // NewBatch satisfies the ethdb.Batcher interface
@@ -186,15 +196,23 @@ func (d *Database) NewBatch() ethdb.Batch {
 	return NewBatch(d.db, nil)
 }
 
-// NewIterator satisfies the ethdb.Iteratee interface
+// NewIterator creates a binary-alphabetical iterator over the entire keyspace
-// it creates a binary-alphabetical iterator over a subset
+// contained within the key-value database.
-// of database content with a particular key prefix, starting at a particular
+func (d *Database) NewIterator() ethdb.Iterator {
-// initial key (or after, if it does not exist).
+	return NewIterator(nil, nil, d.db)
-//
+}
-// Note: This method assumes that the prefix is NOT part of the start, so there's
+
-// no need for the caller to prepend the prefix to the start
+// NewIteratorWithStart creates a binary-alphabetical iterator over a subset of
-func (d *Database) NewIterator(prefix []byte, start []byte) ethdb.Iterator {
+// database content starting at a particular initial key (or after, if it does
-	return NewIterator(start, prefix, d.db)
+// not exist).
+func (d *Database) NewIteratorWithStart(start []byte) ethdb.Iterator {
+	return NewIterator(start, nil, d.db)
+}
+
+// NewIteratorWithPrefix creates a binary-alphabetical iterator over a subset
+// of database content with a particular key prefix.
+func (d *Database) NewIteratorWithPrefix(prefix []byte) ethdb.Iterator {
+	return NewIterator(nil, prefix, d.db)
 }
 
 // Close satisfies the io.Closer interface
@@ -202,45 +220,3 @@ func (d *Database) NewIterator(prefix []byte, start []byte) ethdb.Iterator {
 func (d *Database) Close() error {
 	return d.db.DB.Close()
 }
-
-// HasAncient satisfies the ethdb.AncientReader interface
-// HasAncient returns an indicator whether the specified data exists in the ancient store
-func (d *Database) HasAncient(kind string, number uint64) (bool, error) {
-	return false, errNotSupported
-}
-
-// Ancient satisfies the ethdb.AncientReader interface
-// Ancient retrieves an ancient binary blob from the append-only immutable files
-func (d *Database) Ancient(kind string, number uint64) ([]byte, error) {
-	return nil, errNotSupported
-}
-
-// Ancients satisfies the ethdb.AncientReader interface
-// Ancients returns the ancient item numbers in the ancient store
-func (d *Database) Ancients() (uint64, error) {
-	return 0, errNotSupported
-}
-
-// AncientSize satisfies the ethdb.AncientReader interface
-// AncientSize returns the ancient size of the specified category
-func (d *Database) AncientSize(kind string) (uint64, error) {
-	return 0, errNotSupported
-}
-
-// AppendAncient satisfies the ethdb.AncientWriter interface
-// AppendAncient injects all binary blobs belong to block at the end of the append-only immutable table files
-func (d *Database) AppendAncient(number uint64, hash, header, body, receipt, td []byte) error {
-	return errNotSupported
-}
-
-// TruncateAncients satisfies the ethdb.AncientWriter interface
-// TruncateAncients discards all but the first n ancient data from the ancient store
-func (d *Database) TruncateAncients(n uint64) error {
-	return errNotSupported
-}
-
-// Sync satisfies the ethdb.AncientWriter interface
-// Sync flushes all in-memory ancient store data to disk
-func (d *Database) Sync() error {
-	return errNotSupported
-}

postgres/database_test.go

@@ -19,6 +19,8 @@ package pgipfsethdb_test
 import (
 	"math/big"
 
+	"github.com/ethereum/go-ethereum/common"
+
 	"github.com/ethereum/go-ethereum/core/types"
 	"github.com/ethereum/go-ethereum/ethdb"
 	"github.com/ethereum/go-ethereum/rlp"
@@ -35,8 +37,21 @@ var (
 	err              error
 	testHeader       = types.Header{Number: big.NewInt(1337)}
 	testValue, _     = rlp.EncodeToBytes(testHeader)
-	testEthKey   = testHeader.Hash().Bytes()
+	testKeccakEthKey = testHeader.Hash().Bytes()
-	testMhKey, _ = pgipfsethdb.MultihashKeyFromKeccak256(testEthKey)
+	testMhKey, _     = pgipfsethdb.MultihashKeyFromKeccak256(testKeccakEthKey)
+
+	testPrefixedEthKey = append(append([]byte("prefix"), pgipfsethdb.KeyDelineation...), testKeccakEthKey...)
+	testPrefixedDsKey  = common.Bytes2Hex(testPrefixedEthKey)
+
+	testSuffixedEthKey = append(append(testPrefixedEthKey, pgipfsethdb.KeyDelineation...), []byte("suffix")...)
+	testSuffixedDsKey  = common.Bytes2Hex(testSuffixedEthKey)
+
+	testHeaderEthKey = append(append(append(append(pgipfsethdb.HeaderPrefix, pgipfsethdb.KeyDelineation...),
+		[]byte("number")...), pgipfsethdb.NumberDelineation...), testKeccakEthKey...)
+	testHeaderDsKey = testMhKey
+
+	testPreimageEthKey = append(append(pgipfsethdb.PreimagePrefix, pgipfsethdb.KeyDelineation...), testKeccakEthKey...)
+	testPreimageDsKey  = testMhKey
 )
 
 var _ = Describe("Database", func() {
@@ -50,61 +65,321 @@ var _ = Describe("Database", func() {
 		Expect(err).ToNot(HaveOccurred())
 	})
 
-	Describe("Has", func() {
+	Describe("Has - Keccak keys", func() {
 		It("returns false if a key-pair doesn't exist in the db", func() {
-			has, err := database.Has(testEthKey)
+			has, err := database.Has(testKeccakEthKey)
 			Expect(err).ToNot(HaveOccurred())
 			Expect(has).ToNot(BeTrue())
 		})
 		It("returns true if a key-pair exists in the db", func() {
 			_, err = db.Exec("INSERT into public.blocks (key, data) VALUES ($1, $2)", testMhKey, testValue)
 			Expect(err).ToNot(HaveOccurred())
-			has, err := database.Has(testEthKey)
+			_, err = db.Exec("INSERT into eth.key_preimages (eth_key, ipfs_key) VALUES ($1, $2)", testKeccakEthKey, testMhKey)
+			Expect(err).ToNot(HaveOccurred())
+			has, err := database.Has(testKeccakEthKey)
 			Expect(err).ToNot(HaveOccurred())
 			Expect(has).To(BeTrue())
 		})
 	})
 
-	Describe("Get", func() {
+	Describe("Has - Prefixed keys", func() {
+		It("returns false if a key-pair doesn't exist in the db", func() {
+			has, err := database.Has(testPrefixedEthKey)
+			Expect(err).ToNot(HaveOccurred())
+			Expect(has).ToNot(BeTrue())
+		})
+		It("returns true if a key-pair exists in the db", func() {
+			_, err = db.Exec("INSERT into public.blocks (key, data) VALUES ($1, $2)", testPrefixedDsKey, testValue)
+			Expect(err).ToNot(HaveOccurred())
+			_, err = db.Exec("INSERT into eth.key_preimages (eth_key, ipfs_key) VALUES ($1, $2)", testPrefixedEthKey, testPrefixedDsKey)
+			Expect(err).ToNot(HaveOccurred())
+			has, err := database.Has(testPrefixedEthKey)
+			Expect(err).ToNot(HaveOccurred())
+			Expect(has).To(BeTrue())
+		})
+	})
+
+	Describe("Has - Suffixed keys", func() {
+		It("returns false if a key-pair doesn't exist in the db", func() {
+			has, err := database.Has(testSuffixedEthKey)
+			Expect(err).ToNot(HaveOccurred())
+			Expect(has).ToNot(BeTrue())
+		})
+		It("returns true if a key-pair exists in the db", func() {
+			_, err = db.Exec("INSERT into public.blocks (key, data) VALUES ($1, $2)", testSuffixedDsKey, testValue)
+			Expect(err).ToNot(HaveOccurred())
+			_, err = db.Exec("INSERT into eth.key_preimages (eth_key, ipfs_key) VALUES ($1, $2)", testSuffixedEthKey, testSuffixedDsKey)
+			Expect(err).ToNot(HaveOccurred())
+			has, err := database.Has(testSuffixedEthKey)
+			Expect(err).ToNot(HaveOccurred())
+			Expect(has).To(BeTrue())
+		})
+	})
+
+	Describe("Has - Header keys", func() {
+		It("returns false if a key-pair doesn't exist in the db", func() {
+			has, err := database.Has(testHeaderEthKey)
+			Expect(err).ToNot(HaveOccurred())
+			Expect(has).ToNot(BeTrue())
+		})
+		It("returns true if a key-pair exists in the db", func() {
+			_, err = db.Exec("INSERT into public.blocks (key, data) VALUES ($1, $2)", testHeaderDsKey, testValue)
+			Expect(err).ToNot(HaveOccurred())
+			_, err = db.Exec("INSERT into eth.key_preimages (eth_key, ipfs_key) VALUES ($1, $2)", testHeaderEthKey, testHeaderDsKey)
+			Expect(err).ToNot(HaveOccurred())
+			has, err := database.Has(testHeaderEthKey)
+			Expect(err).ToNot(HaveOccurred())
+			Expect(has).To(BeTrue())
+		})
+	})
+
+	Describe("Has - Preimage keys", func() {
+		It("returns false if a key-pair doesn't exist in the db", func() {
+			has, err := database.Has(testPreimageEthKey)
+			Expect(err).ToNot(HaveOccurred())
+			Expect(has).ToNot(BeTrue())
+		})
+		It("returns true if a key-pair exists in the db", func() {
+			_, err = db.Exec("INSERT into public.blocks (key, data) VALUES ($1, $2)", testPreimageDsKey, testValue)
+			Expect(err).ToNot(HaveOccurred())
+			_, err = db.Exec("INSERT into eth.key_preimages (eth_key, ipfs_key) VALUES ($1, $2)", testPreimageEthKey, testPreimageDsKey)
+			Expect(err).ToNot(HaveOccurred())
+			has, err := database.Has(testPreimageEthKey)
+			Expect(err).ToNot(HaveOccurred())
+			Expect(has).To(BeTrue())
+		})
+	})
+
+	Describe("Get - Keccak keys", func() {
 		It("throws an err if the key-pair doesn't exist in the db", func() {
-			_, err = database.Get(testEthKey)
+			_, err = database.Get(testKeccakEthKey)
 			Expect(err).To(HaveOccurred())
 			Expect(err.Error()).To(ContainSubstring("sql: no rows in result set"))
 		})
 		It("returns the value associated with the key, if the pair exists", func() {
 			_, err = db.Exec("INSERT into public.blocks (key, data) VALUES ($1, $2)", testMhKey, testValue)
 			Expect(err).ToNot(HaveOccurred())
-			val, err := database.Get(testEthKey)
+			_, err = db.Exec("INSERT into eth.key_preimages (eth_key, ipfs_key) VALUES ($1, $2)", testKeccakEthKey, testMhKey)
+			Expect(err).ToNot(HaveOccurred())
+			val, err := database.Get(testKeccakEthKey)
 			Expect(err).ToNot(HaveOccurred())
 			Expect(val).To(Equal(testValue))
 		})
 	})
 
-	Describe("Put", func() {
+	Describe("Get - Prefixed keys", func() {
+		It("throws an err if the key-pair doesn't exist in the db", func() {
+			_, err = database.Get(testPrefixedEthKey)
+			Expect(err).To(HaveOccurred())
+			Expect(err.Error()).To(ContainSubstring("sql: no rows in result set"))
+		})
+		It("returns the value associated with the key, if the pair exists", func() {
+			_, err = db.Exec("INSERT into public.blocks (key, data) VALUES ($1, $2)", testPrefixedDsKey, testValue)
+			Expect(err).ToNot(HaveOccurred())
+			_, err = db.Exec("INSERT into eth.key_preimages (eth_key, ipfs_key) VALUES ($1, $2)", testPrefixedEthKey, testPrefixedDsKey)
+			Expect(err).ToNot(HaveOccurred())
+			val, err := database.Get(testPrefixedEthKey)
+			Expect(err).ToNot(HaveOccurred())
+			Expect(val).To(Equal(testValue))
+		})
+	})
+
+	Describe("Get - Suffixed keys", func() {
+		It("throws an err if the key-pair doesn't exist in the db", func() {
+			_, err = database.Get(testSuffixedEthKey)
+			Expect(err).To(HaveOccurred())
+			Expect(err.Error()).To(ContainSubstring("sql: no rows in result set"))
+		})
+		It("returns the value associated with the key, if the pair exists", func() {
+			_, err = db.Exec("INSERT into public.blocks (key, data) VALUES ($1, $2)", testSuffixedDsKey, testValue)
+			Expect(err).ToNot(HaveOccurred())
+			_, err = db.Exec("INSERT into eth.key_preimages (eth_key, ipfs_key) VALUES ($1, $2)", testSuffixedEthKey, testSuffixedDsKey)
+			Expect(err).ToNot(HaveOccurred())
+			val, err := database.Get(testSuffixedEthKey)
+			Expect(err).ToNot(HaveOccurred())
+			Expect(val).To(Equal(testValue))
+		})
+	})
+
+	Describe("Get - Header keys", func() {
+		It("throws an err if the key-pair doesn't exist in the db", func() {
+			_, err = database.Get(testHeaderEthKey)
+			Expect(err).To(HaveOccurred())
+			Expect(err.Error()).To(ContainSubstring("sql: no rows in result set"))
+		})
+		It("returns the value associated with the key, if the pair exists", func() {
+			_, err = db.Exec("INSERT into public.blocks (key, data) VALUES ($1, $2)", testHeaderDsKey, testValue)
+			Expect(err).ToNot(HaveOccurred())
+			_, err = db.Exec("INSERT into eth.key_preimages (eth_key, ipfs_key) VALUES ($1, $2)", testHeaderEthKey, testHeaderDsKey)
+			Expect(err).ToNot(HaveOccurred())
+			val, err := database.Get(testHeaderEthKey)
+			Expect(err).ToNot(HaveOccurred())
+			Expect(val).To(Equal(testValue))
+		})
+	})
+
+	Describe("Get - Preimage keys", func() {
+		It("throws an err if the key-pair doesn't exist in the db", func() {
+			_, err = database.Get(testPreimageEthKey)
+			Expect(err).To(HaveOccurred())
+			Expect(err.Error()).To(ContainSubstring("sql: no rows in result set"))
+		})
+		It("returns the value associated with the key, if the pair exists", func() {
+			_, err = db.Exec("INSERT into public.blocks (key, data) VALUES ($1, $2)", testPreimageDsKey, testValue)
+			Expect(err).ToNot(HaveOccurred())
+			_, err = db.Exec("INSERT into eth.key_preimages (eth_key, ipfs_key) VALUES ($1, $2)", testPreimageEthKey, testPreimageDsKey)
+			Expect(err).ToNot(HaveOccurred())
+			val, err := database.Get(testPreimageEthKey)
+			Expect(err).ToNot(HaveOccurred())
+			Expect(val).To(Equal(testValue))
+		})
+	})
+
+	Describe("Put - Keccak keys", func() {
 		It("persists the key-value pair in the database", func() {
-			_, err = database.Get(testEthKey)
+			_, err = database.Get(testKeccakEthKey)
 			Expect(err).To(HaveOccurred())
 			Expect(err.Error()).To(ContainSubstring("sql: no rows in result set"))
 
-			err = database.Put(testEthKey, testValue)
+			err = database.Put(testKeccakEthKey, testValue)
 			Expect(err).ToNot(HaveOccurred())
-			val, err := database.Get(testEthKey)
+			val, err := database.Get(testKeccakEthKey)
 			Expect(err).ToNot(HaveOccurred())
 			Expect(val).To(Equal(testValue))
 		})
 	})
 
-	Describe("Delete", func() {
+	Describe("Put - Prefixed keys", func() {
+		It("persists the key-value pair in the database", func() {
+			_, err = database.Get(testPrefixedEthKey)
+			Expect(err).To(HaveOccurred())
+			Expect(err.Error()).To(ContainSubstring("sql: no rows in result set"))
+
+			err = database.Put(testPrefixedEthKey, testValue)
+			Expect(err).ToNot(HaveOccurred())
+			val, err := database.Get(testPrefixedEthKey)
+			Expect(err).ToNot(HaveOccurred())
+			Expect(val).To(Equal(testValue))
+		})
+	})
+
+	Describe("Put - Suffixed keys", func() {
+		It("persists the key-value pair in the database", func() {
+			_, err = database.Get(testSuffixedEthKey)
+			Expect(err).To(HaveOccurred())
+			Expect(err.Error()).To(ContainSubstring("sql: no rows in result set"))
+
+			err = database.Put(testSuffixedEthKey, testValue)
+			Expect(err).ToNot(HaveOccurred())
+			val, err := database.Get(testSuffixedEthKey)
+			Expect(err).ToNot(HaveOccurred())
+			Expect(val).To(Equal(testValue))
+		})
+	})
+
+	Describe("Put - Header keys", func() {
+		It("persists the key-value pair in the database", func() {
+			_, err = database.Get(testHeaderEthKey)
+			Expect(err).To(HaveOccurred())
+			Expect(err.Error()).To(ContainSubstring("sql: no rows in result set"))
+
+			err = database.Put(testHeaderEthKey, testValue)
+			Expect(err).ToNot(HaveOccurred())
+			val, err := database.Get(testHeaderEthKey)
+			Expect(err).ToNot(HaveOccurred())
+			Expect(val).To(Equal(testValue))
+		})
+	})
+
+	Describe("Put - Preimage keys", func() {
+		It("persists the key-value pair in the database", func() {
+			_, err = database.Get(testPreimageEthKey)
+			Expect(err).To(HaveOccurred())
+			Expect(err.Error()).To(ContainSubstring("sql: no rows in result set"))
+
+			err = database.Put(testPreimageEthKey, testValue)
+			Expect(err).ToNot(HaveOccurred())
+			val, err := database.Get(testPreimageEthKey)
+			Expect(err).ToNot(HaveOccurred())
+			Expect(val).To(Equal(testValue))
+		})
+	})
+
+	Describe("Delete - Keccak keys", func() {
 		It("removes the key-value pair from the database", func() {
-			err = database.Put(testEthKey, testValue)
+			err = database.Put(testKeccakEthKey, testValue)
 			Expect(err).ToNot(HaveOccurred())
-			val, err := database.Get(testEthKey)
+			val, err := database.Get(testKeccakEthKey)
 			Expect(err).ToNot(HaveOccurred())
 			Expect(val).To(Equal(testValue))
 
-			err = database.Delete(testEthKey)
+			err = database.Delete(testKeccakEthKey)
 			Expect(err).ToNot(HaveOccurred())
-			_, err = database.Get(testEthKey)
+			_, err = database.Get(testKeccakEthKey)
+			Expect(err).To(HaveOccurred())
+			Expect(err.Error()).To(ContainSubstring("sql: no rows in result set"))
+		})
+	})
+
+	Describe("Delete - Prefixed keys", func() {
+		It("removes the key-value pair from the database", func() {
+			err = database.Put(testPrefixedEthKey, testValue)
+			Expect(err).ToNot(HaveOccurred())
+			val, err := database.Get(testPrefixedEthKey)
+			Expect(err).ToNot(HaveOccurred())
+			Expect(val).To(Equal(testValue))
+
+			err = database.Delete(testPrefixedEthKey)
+			Expect(err).ToNot(HaveOccurred())
+			_, err = database.Get(testPrefixedEthKey)
+			Expect(err).To(HaveOccurred())
+			Expect(err.Error()).To(ContainSubstring("sql: no rows in result set"))
+		})
+	})
+
+	Describe("Delete - Suffixed keys", func() {
+		It("removes the key-value pair from the database", func() {
+			err = database.Put(testSuffixedEthKey, testValue)
+			Expect(err).ToNot(HaveOccurred())
+			val, err := database.Get(testSuffixedEthKey)
+			Expect(err).ToNot(HaveOccurred())
+			Expect(val).To(Equal(testValue))
+
+			err = database.Delete(testSuffixedEthKey)
+			Expect(err).ToNot(HaveOccurred())
+			_, err = database.Get(testSuffixedEthKey)
+			Expect(err).To(HaveOccurred())
+			Expect(err.Error()).To(ContainSubstring("sql: no rows in result set"))
+		})
+	})
+
+	Describe("Delete - Header keys", func() {
+		It("removes the key-value pair from the database", func() {
+			err = database.Put(testHeaderEthKey, testValue)
+			Expect(err).ToNot(HaveOccurred())
+			val, err := database.Get(testHeaderEthKey)
+			Expect(err).ToNot(HaveOccurred())
+			Expect(val).To(Equal(testValue))
+
+			err = database.Delete(testHeaderEthKey)
+			Expect(err).ToNot(HaveOccurred())
+			_, err = database.Get(testHeaderEthKey)
+			Expect(err).To(HaveOccurred())
+			Expect(err.Error()).To(ContainSubstring("sql: no rows in result set"))
+		})
+	})
+
+	Describe("Delete - Preimage keys", func() {
+		It("removes the key-value pair from the database", func() {
+			err = database.Put(testPreimageEthKey, testValue)
+			Expect(err).ToNot(HaveOccurred())
+			val, err := database.Get(testPreimageEthKey)
+			Expect(err).ToNot(HaveOccurred())
+			Expect(val).To(Equal(testValue))
+
+			err = database.Delete(testPreimageEthKey)
+			Expect(err).ToNot(HaveOccurred())
+			_, err = database.Get(testPreimageEthKey)
 			Expect(err).To(HaveOccurred())
 			Expect(err.Error()).To(ContainSubstring("sql: no rows in result set"))
 		})

postgres/db/migrations/00001_create_ipfs_blocks_table.sql

@@ -0,0 +1,8 @@
+-- +goose Up
+CREATE TABLE IF NOT EXISTS public.blocks (
+  key TEXT UNIQUE NOT NULL,
+  data BYTEA NOT NULL
+);
+
+-- +goose Down
+DROP TABLE public.blocks;

postgres/db/migrations/00002_create_eth_schema.sql

@@ -0,0 +1,5 @@
+-- +goose Up
+CREATE SCHEMA eth;
+
+-- +goose Down
+DROP SCHEMA eth;

postgres/db/migrations/00003_create_eth_key_preimages_table.sql

@@ -0,0 +1,9 @@
+-- +goose Up
+CREATE TABLE IF NOT EXISTS eth.key_preimages (
+  eth_key BYTEA UNIQUE NOT NULL,
+  prefix BYTEA,
+  ipfs_key TEXT NOT NULL REFERENCES public.blocks (key) ON DELETE CASCADE DEFERRABLE INITIALLY DEFERRED
+);
+
+-- +goose Down
+DROP TABLE eth.key_preimages;

postgres/db/migrations/00004_create_eth_ancient_headers_table.sql

@@ -0,0 +1,8 @@
+-- +goose Up
+CREATE TABLE IF NOT EXISTS eth.ancient_headers (
+  block_number BIGINT UNIQUE NOT NULL,
+  header BYTEA NOT NULL
+);
+
+-- +goose Down
+DROP TABLE eth.ancient_headers;

postgres/db/migrations/00005_create_eth_ancient_hashes_table.sql

@@ -0,0 +1,8 @@
+-- +goose Up
+CREATE TABLE IF NOT EXISTS eth.ancient_hashes (
+  block_number BIGINT UNIQUE NOT NULL,
+  hash BYTEA NOT NULL
+);
+
+-- +goose Down
+DROP TABLE eth.ancient_hashes;

postgres/db/migrations/00006_create_eth_ancient_bodies_table.sql

@@ -0,0 +1,8 @@
+-- +goose Up
+CREATE TABLE IF NOT EXISTS eth.ancient_bodies (
+  block_number BIGINT UNIQUE NOT NULL,
+  body BYTEA NOT NULL
+);
+
+-- +goose Down
+DROP TABLE eth.ancient_bodies;

postgres/db/migrations/00007_create_eth_ancient_receipts_table.sql

@@ -0,0 +1,8 @@
+-- +goose Up
+CREATE TABLE IF NOT EXISTS eth.ancient_receipts (
+  block_number BIGINT UNIQUE NOT NULL,
+  receipts BYTEA NOT NULL
+);
+
+-- +goose Down
+DROP TABLE eth.ancient_receipts;

postgres/db/migrations/00008_create_eth_ancient_tds_table.sql

@@ -0,0 +1,8 @@
+-- +goose Up
+CREATE TABLE IF NOT EXISTS eth.ancient_tds (
+  block_number BIGINT UNIQUE NOT NULL,
+  td BYTEA NOT NULL
+);
+
+-- +goose Down
+DROP TABLE eth.ancient_tds;

postgres/doc.md

@@ -33,7 +33,7 @@ func main() {
 
     database := pgipfsethdb.NewDatabase(db)
     stateDatabase := state.NewDatabase(database)
-    stateDB, _ := state.New(common.Hash{}, stateDatabase, nil)
+    stateDB, _ := state.New(common.Hash{}, stateDatabase)
     stateDBNodeIterator := state.NewNodeIterator(stateDB)
     // do stuff with the statedb node iterator
 }

postgres/iterator.go

@@ -21,15 +21,31 @@ import (
 	"github.com/jmoiron/sqlx"
 )
 
+const (
+	initPgStr = `SELECT eth_key, data FROM public.blocks
+				INNER JOIN eth.key_preimages ON (ipfs_key = key)
+				WHERE eth_key = $1`
+	nextPgStr = `SELECT eth_key, data FROM public.blocks
+				INNER JOIN eth.key_preimages ON (ipfs_key = key)
+				WHERE eth_key > $1
+				ORDER BY eth_key LIMIT 1`
+	nextPgStrWithPrefix = `SELECT eth_key, data FROM public.blocks
+				INNER JOIN eth.key_preimages ON (ipfs_key = key)
+				WHERE eth_key > $1 AND prefix = $2 
+				ORDER BY eth_key LIMIT 1`
+)
+
+type nextModel struct {
+	Key   []byte `db:"eth_key"`
+	Value []byte `db:"data"`
+}
+
 // Iterator is the type that satisfies the ethdb.Iterator interface for PG-IPFS Ethereum data using a direct Postgres connection
-// Iteratee interface is used in Geth for various tests, trie/sync_bloom.go (for fast sync),
-// rawdb.InspectDatabase, and the new core/state/snapshot features.
-// This should not be confused with trie.NodeIterator or state.NodeIteraor (which can be constructed
-// from the ethdb.KeyValueStoreand ethdb.Database interfaces)
 type Iterator struct {
 	db                               *sqlx.DB
-	currentKey, prefix []byte
+	currentKey, prefix, currentValue []byte
 	err                              error
+	init                             bool
 }
 
 // NewIterator returns an ethdb.Iterator interface for PG-IPFS
@@ -38,6 +54,7 @@ func NewIterator(start, prefix []byte, db *sqlx.DB) ethdb.Iterator {
 		db:         db,
 		prefix:     prefix,
 		currentKey: start,
+		init:       start != nil,
 	}
 }
 
@@ -45,9 +62,26 @@ func NewIterator(start, prefix []byte, db *sqlx.DB) ethdb.Iterator {
 // Next moves the iterator to the next key/value pair
 // It returns whether the iterator is exhausted
 func (i *Iterator) Next() bool {
-	// this is complicated by the ipfs db keys not being the keccak256 hashes
+	next := new(nextModel)
-	// go-ethereum usage of this method expects the iteration to occur over keccak256 keys
+	if i.init {
-	panic("implement me: Next")
+		i.init = false
+		if err := i.db.Get(next, initPgStr, i.currentKey); err != nil {
+			i.currentKey, i.currentValue, i.err = nil, nil, err
+			return false
+		}
+	} else if i.prefix != nil {
+		if err := i.db.Get(next, nextPgStrWithPrefix, i.currentKey, i.prefix); err != nil {
+			i.currentKey, i.currentValue, i.err = nil, nil, err
+			return false
+		}
+	} else {
+		if err := i.db.Get(next, nextPgStr, i.currentKey); err != nil {
+			i.currentKey, i.currentValue, i.err = nil, nil, err
+			return false
+		}
+	}
+	i.currentKey, i.currentValue, i.err = next.Key, next.Value, nil
+	return true
 }
 
 // Error satisfies the ethdb.Iterator interface
@@ -70,19 +104,12 @@ func (i *Iterator) Key() []byte {
 // The caller should not modify the contents of the returned slice
 // and its contents may change on the next call to Next
 func (i *Iterator) Value() []byte {
-	mhKey, err := MultihashKeyFromKeccak256(i.currentKey)
+	return i.currentValue
-	if err != nil {
-		i.err = err
-		return nil
-	}
-	var data []byte
-	i.err = i.db.Get(&data, getPgStr, mhKey)
-	return data
 }
 
 // Release satisfies the ethdb.Iterator interface
 // Release releases associated resources
 // Release should always succeed and can be called multiple times without causing error
 func (i *Iterator) Release() {
-	i.db.Close()
+	i.db, i.currentKey, i.currentValue, i.err, i.prefix = nil, nil, nil, nil, nil
 }

postgres/iterator_test.go

@@ -0,0 +1,513 @@
+// VulcanizeDB
+// Copyright © 2020 Vulcanize
+
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// This program 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 Affero General Public License for more details.
+
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+package pgipfsethdb_test
+
+import (
+	"database/sql"
+
+	"github.com/ethereum/go-ethereum/ethdb"
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+
+	"github.com/vulcanize/ipfs-ethdb/postgres"
+)
+
+var (
+	iterator            ethdb.Iterator
+	testPrefix          = []byte("testPrefix")
+	testEthKey1         = []byte{'\x01'}
+	testEthKey2         = []byte{'\x01', '\x01'}
+	testEthKey3         = []byte{'\x01', '\x02'}
+	testEthKey4         = []byte{'\x01', '\x0e'}
+	testEthKey5         = []byte{'\x01', '\x02', '\x01'}
+	testEthKey6         = []byte{'\x01', '\x0e', '\x01'}
+	prefixedTestEthKey1 = append(append(testPrefix, pgipfsethdb.KeyDelineation...), testEthKey1...)
+	prefixedTestEthKey2 = append(append(testPrefix, pgipfsethdb.KeyDelineation...), testEthKey2...)
+	prefixedTestEthKey3 = append(append(testPrefix, pgipfsethdb.KeyDelineation...), testEthKey3...)
+	prefixedTestEthKey4 = append(append(testPrefix, pgipfsethdb.KeyDelineation...), testEthKey4...)
+	prefixedTestEthKey5 = append(append(testPrefix, pgipfsethdb.KeyDelineation...), testEthKey5...)
+	prefixedTestEthKey6 = append(append(testPrefix, pgipfsethdb.KeyDelineation...), testEthKey6...)
+	mockValue1          = []byte{1}
+	mockValue2          = []byte{2}
+	mockValue3          = []byte{3}
+	mockValue4          = []byte{4}
+	mockValue5          = []byte{5}
+	mockValue6          = []byte{6}
+)
+
+var _ = Describe("Iterator", func() {
+	BeforeEach(func() {
+		db, err = pgipfsethdb.TestDB()
+		Expect(err).ToNot(HaveOccurred())
+		database = pgipfsethdb.NewDatabase(db)
+		// non-prefixed entries
+		err = database.Put(testEthKey1, mockValue1)
+		Expect(err).ToNot(HaveOccurred())
+		err = database.Put(testEthKey2, mockValue2)
+		Expect(err).ToNot(HaveOccurred())
+		err = database.Put(testEthKey3, mockValue3)
+		Expect(err).ToNot(HaveOccurred())
+		err = database.Put(testEthKey4, mockValue4)
+		Expect(err).ToNot(HaveOccurred())
+		err = database.Put(testEthKey5, mockValue5)
+		Expect(err).ToNot(HaveOccurred())
+		err = database.Put(testEthKey6, mockValue6)
+		Expect(err).ToNot(HaveOccurred())
+		// prefixed entries
+		err = database.Put(prefixedTestEthKey1, mockValue1)
+		Expect(err).ToNot(HaveOccurred())
+		err = database.Put(prefixedTestEthKey2, mockValue2)
+		Expect(err).ToNot(HaveOccurred())
+		err = database.Put(prefixedTestEthKey3, mockValue3)
+		Expect(err).ToNot(HaveOccurred())
+		err = database.Put(prefixedTestEthKey4, mockValue4)
+		Expect(err).ToNot(HaveOccurred())
+		err = database.Put(prefixedTestEthKey5, mockValue5)
+		Expect(err).ToNot(HaveOccurred())
+		err = database.Put(prefixedTestEthKey6, mockValue6)
+		Expect(err).ToNot(HaveOccurred())
+	})
+	AfterEach(func() {
+		err = pgipfsethdb.ResetTestDB(db)
+		Expect(err).ToNot(HaveOccurred())
+	})
+
+	Describe("NewIterator", func() {
+		It("iterates over the entire key-set (prefixed or not)", func() {
+			iterator = database.NewIterator()
+			Expect(iterator.Value()).To(BeNil())
+			Expect(iterator.Key()).To(BeNil())
+			Expect(iterator.Error()).To(BeNil())
+
+			more := iterator.Next()
+			Expect(more).To(BeTrue())
+			Expect(iterator.Key()).To(Equal(testEthKey1))
+			Expect(iterator.Value()).To(Equal(mockValue1))
+			Expect(iterator.Error()).To(BeNil())
+
+			more = iterator.Next()
+			Expect(more).To(BeTrue())
+			Expect(iterator.Key()).To(Equal(testEthKey2))
+			Expect(iterator.Value()).To(Equal(mockValue2))
+			Expect(iterator.Error()).To(BeNil())
+
+			more = iterator.Next()
+			Expect(more).To(BeTrue())
+			Expect(iterator.Key()).To(Equal(testEthKey3))
+			Expect(iterator.Value()).To(Equal(mockValue3))
+			Expect(iterator.Error()).To(BeNil())
+
+			more = iterator.Next()
+			Expect(more).To(BeTrue())
+			Expect(iterator.Key()).To(Equal(testEthKey5))
+			Expect(iterator.Value()).To(Equal(mockValue5))
+			Expect(iterator.Error()).To(BeNil())
+
+			more = iterator.Next()
+			Expect(more).To(BeTrue())
+			Expect(iterator.Key()).To(Equal(testEthKey4))
+			Expect(iterator.Value()).To(Equal(mockValue4))
+			Expect(iterator.Error()).To(BeNil())
+
+			more = iterator.Next()
+			Expect(more).To(BeTrue())
+			Expect(iterator.Key()).To(Equal(testEthKey6))
+			Expect(iterator.Value()).To(Equal(mockValue6))
+			Expect(iterator.Error()).To(BeNil())
+
+			more = iterator.Next()
+			Expect(more).To(BeTrue())
+			Expect(iterator.Key()).To(Equal(prefixedTestEthKey1))
+			Expect(iterator.Value()).To(Equal(mockValue1))
+			Expect(iterator.Error()).To(BeNil())
+
+			more = iterator.Next()
+			Expect(more).To(BeTrue())
+			Expect(iterator.Key()).To(Equal(prefixedTestEthKey2))
+			Expect(iterator.Value()).To(Equal(mockValue2))
+			Expect(iterator.Error()).To(BeNil())
+
+			more = iterator.Next()
+			Expect(more).To(BeTrue())
+			Expect(iterator.Key()).To(Equal(prefixedTestEthKey3))
+			Expect(iterator.Value()).To(Equal(mockValue3))
+			Expect(iterator.Error()).To(BeNil())
+
+			more = iterator.Next()
+			Expect(more).To(BeTrue())
+			Expect(iterator.Key()).To(Equal(prefixedTestEthKey5))
+			Expect(iterator.Value()).To(Equal(mockValue5))
+			Expect(iterator.Error()).To(BeNil())
+
+			more = iterator.Next()
+			Expect(more).To(BeTrue())
+			Expect(iterator.Key()).To(Equal(prefixedTestEthKey4))
+			Expect(iterator.Value()).To(Equal(mockValue4))
+			Expect(iterator.Error()).To(BeNil())
+
+			more = iterator.Next()
+			Expect(more).To(BeTrue())
+			Expect(iterator.Key()).To(Equal(prefixedTestEthKey6))
+			Expect(iterator.Value()).To(Equal(mockValue6))
+			Expect(iterator.Error()).To(BeNil())
+
+			more = iterator.Next()
+			Expect(more).ToNot(BeTrue())
+			Expect(iterator.Value()).To(BeNil())
+			Expect(iterator.Key()).To(BeNil())
+			Expect(iterator.Error()).To(Equal(sql.ErrNoRows))
+		})
+	})
+
+	Describe("NewIteratorWithPrefix", func() {
+		It("iterates over all db entries that have the provided prefix", func() {
+			iterator = database.NewIteratorWithPrefix(testPrefix)
+			Expect(iterator.Value()).To(BeNil())
+			Expect(iterator.Key()).To(BeNil())
+			Expect(iterator.Error()).To(BeNil())
+
+			more := iterator.Next()
+			Expect(more).To(BeTrue())
+			Expect(iterator.Key()).To(Equal(prefixedTestEthKey1))
+			Expect(iterator.Value()).To(Equal(mockValue1))
+			Expect(iterator.Error()).To(BeNil())
+
+			more = iterator.Next()
+			Expect(more).To(BeTrue())
+			Expect(iterator.Key()).To(Equal(prefixedTestEthKey2))
+			Expect(iterator.Value()).To(Equal(mockValue2))
+			Expect(iterator.Error()).To(BeNil())
+
+			more = iterator.Next()
+			Expect(more).To(BeTrue())
+			Expect(iterator.Key()).To(Equal(prefixedTestEthKey3))
+			Expect(iterator.Value()).To(Equal(mockValue3))
+			Expect(iterator.Error()).To(BeNil())
+
+			more = iterator.Next()
+			Expect(more).To(BeTrue())
+			Expect(iterator.Key()).To(Equal(prefixedTestEthKey5))
+			Expect(iterator.Value()).To(Equal(mockValue5))
+			Expect(iterator.Error()).To(BeNil())
+
+			more = iterator.Next()
+			Expect(more).To(BeTrue())
+			Expect(iterator.Key()).To(Equal(prefixedTestEthKey4))
+			Expect(iterator.Value()).To(Equal(mockValue4))
+			Expect(iterator.Error()).To(BeNil())
+
+			more = iterator.Next()
+			Expect(more).To(BeTrue())
+			Expect(iterator.Key()).To(Equal(prefixedTestEthKey6))
+			Expect(iterator.Value()).To(Equal(mockValue6))
+			Expect(iterator.Error()).To(BeNil())
+
+			more = iterator.Next()
+			Expect(more).ToNot(BeTrue())
+			Expect(iterator.Value()).To(BeNil())
+			Expect(iterator.Key()).To(BeNil())
+			Expect(iterator.Error()).To(Equal(sql.ErrNoRows))
+		})
+
+		It("behaves as no prefix is provided if prefix is nil", func() {
+			iterator = database.NewIteratorWithPrefix(nil)
+			Expect(iterator.Value()).To(BeNil())
+			Expect(iterator.Key()).To(BeNil())
+			Expect(iterator.Error()).To(BeNil())
+
+			more := iterator.Next()
+			Expect(more).To(BeTrue())
+			Expect(iterator.Key()).To(Equal(testEthKey1))
+			Expect(iterator.Value()).To(Equal(mockValue1))
+			Expect(iterator.Error()).To(BeNil())
+
+			more = iterator.Next()
+			Expect(more).To(BeTrue())
+			Expect(iterator.Key()).To(Equal(testEthKey2))
+			Expect(iterator.Value()).To(Equal(mockValue2))
+			Expect(iterator.Error()).To(BeNil())
+
+			more = iterator.Next()
+			Expect(more).To(BeTrue())
+			Expect(iterator.Key()).To(Equal(testEthKey3))
+			Expect(iterator.Value()).To(Equal(mockValue3))
+			Expect(iterator.Error()).To(BeNil())
+
+			more = iterator.Next()
+			Expect(more).To(BeTrue())
+			Expect(iterator.Key()).To(Equal(testEthKey5))
+			Expect(iterator.Value()).To(Equal(mockValue5))
+			Expect(iterator.Error()).To(BeNil())
+
+			more = iterator.Next()
+			Expect(more).To(BeTrue())
+			Expect(iterator.Key()).To(Equal(testEthKey4))
+			Expect(iterator.Value()).To(Equal(mockValue4))
+			Expect(iterator.Error()).To(BeNil())
+
+			more = iterator.Next()
+			Expect(more).To(BeTrue())
+			Expect(iterator.Key()).To(Equal(testEthKey6))
+			Expect(iterator.Value()).To(Equal(mockValue6))
+			Expect(iterator.Error()).To(BeNil())
+
+			more = iterator.Next()
+			Expect(more).To(BeTrue())
+			Expect(iterator.Key()).To(Equal(prefixedTestEthKey1))
+			Expect(iterator.Value()).To(Equal(mockValue1))
+			Expect(iterator.Error()).To(BeNil())
+
+			more = iterator.Next()
+			Expect(more).To(BeTrue())
+			Expect(iterator.Key()).To(Equal(prefixedTestEthKey2))
+			Expect(iterator.Value()).To(Equal(mockValue2))
+			Expect(iterator.Error()).To(BeNil())
+
+			more = iterator.Next()
+			Expect(more).To(BeTrue())
+			Expect(iterator.Key()).To(Equal(prefixedTestEthKey3))
+			Expect(iterator.Value()).To(Equal(mockValue3))
+			Expect(iterator.Error()).To(BeNil())
+
+			more = iterator.Next()
+			Expect(more).To(BeTrue())
+			Expect(iterator.Key()).To(Equal(prefixedTestEthKey5))
+			Expect(iterator.Value()).To(Equal(mockValue5))
+			Expect(iterator.Error()).To(BeNil())
+
+			more = iterator.Next()
+			Expect(more).To(BeTrue())
+			Expect(iterator.Key()).To(Equal(prefixedTestEthKey4))
+			Expect(iterator.Value()).To(Equal(mockValue4))
+			Expect(iterator.Error()).To(BeNil())
+
+			more = iterator.Next()
+			Expect(more).To(BeTrue())
+			Expect(iterator.Key()).To(Equal(prefixedTestEthKey6))
+			Expect(iterator.Value()).To(Equal(mockValue6))
+			Expect(iterator.Error()).To(BeNil())
+
+			more = iterator.Next()
+			Expect(more).ToNot(BeTrue())
+			Expect(iterator.Value()).To(BeNil())
+			Expect(iterator.Key()).To(BeNil())
+			Expect(iterator.Error()).To(Equal(sql.ErrNoRows))
+		})
+
+		It("considers empty but non-nil []byte a valid prefix, which precludes iteration over any other prefixed keys", func() {
+			iterator = database.NewIteratorWithPrefix([]byte{})
+			Expect(iterator.Value()).To(BeNil())
+			Expect(iterator.Key()).To(BeNil())
+			Expect(iterator.Error()).To(BeNil())
+
+			more := iterator.Next()
+			Expect(more).To(BeTrue())
+			Expect(iterator.Key()).To(Equal(testEthKey1))
+			Expect(iterator.Value()).To(Equal(mockValue1))
+			Expect(iterator.Error()).To(BeNil())
+
+			more = iterator.Next()
+			Expect(more).To(BeTrue())
+			Expect(iterator.Key()).To(Equal(testEthKey2))
+			Expect(iterator.Value()).To(Equal(mockValue2))
+			Expect(iterator.Error()).To(BeNil())
+
+			more = iterator.Next()
+			Expect(more).To(BeTrue())
+			Expect(iterator.Key()).To(Equal(testEthKey3))
+			Expect(iterator.Value()).To(Equal(mockValue3))
+			Expect(iterator.Error()).To(BeNil())
+
+			more = iterator.Next()
+			Expect(more).To(BeTrue())
+			Expect(iterator.Key()).To(Equal(testEthKey5))
+			Expect(iterator.Value()).To(Equal(mockValue5))
+			Expect(iterator.Error()).To(BeNil())
+
+			more = iterator.Next()
+			Expect(more).To(BeTrue())
+			Expect(iterator.Key()).To(Equal(testEthKey4))
+			Expect(iterator.Value()).To(Equal(mockValue4))
+			Expect(iterator.Error()).To(BeNil())
+
+			more = iterator.Next()
+			Expect(more).To(BeTrue())
+			Expect(iterator.Key()).To(Equal(testEthKey6))
+			Expect(iterator.Value()).To(Equal(mockValue6))
+			Expect(iterator.Error()).To(BeNil())
+
+			more = iterator.Next()
+			Expect(more).ToNot(BeTrue())
+			Expect(iterator.Value()).To(BeNil())
+			Expect(iterator.Key()).To(BeNil())
+			Expect(iterator.Error()).To(Equal(sql.ErrNoRows))
+		})
+	})
+
+	Describe("NewIteratorWithStart", func() {
+		It("iterates over the entire key-set (prefixed or not) starting with at the provided path", func() {
+			iterator = database.NewIteratorWithStart(testEthKey2)
+			Expect(iterator.Value()).To(BeNil())
+			Expect(iterator.Key()).To(Equal(testEthKey2))
+			Expect(iterator.Error()).To(BeNil())
+
+			more := iterator.Next()
+			Expect(more).To(BeTrue())
+			Expect(iterator.Key()).To(Equal(testEthKey2))
+			Expect(iterator.Value()).To(Equal(mockValue2))
+			Expect(iterator.Error()).To(BeNil())
+
+			more = iterator.Next()
+			Expect(more).To(BeTrue())
+			Expect(iterator.Key()).To(Equal(testEthKey3))
+			Expect(iterator.Value()).To(Equal(mockValue3))
+			Expect(iterator.Error()).To(BeNil())
+
+			more = iterator.Next()
+			Expect(more).To(BeTrue())
+			Expect(iterator.Key()).To(Equal(testEthKey5))
+			Expect(iterator.Value()).To(Equal(mockValue5))
+			Expect(iterator.Error()).To(BeNil())
+
+			more = iterator.Next()
+			Expect(more).To(BeTrue())
+			Expect(iterator.Key()).To(Equal(testEthKey4))
+			Expect(iterator.Value()).To(Equal(mockValue4))
+			Expect(iterator.Error()).To(BeNil())
+
+			more = iterator.Next()
+			Expect(more).To(BeTrue())
+			Expect(iterator.Key()).To(Equal(testEthKey6))
+			Expect(iterator.Value()).To(Equal(mockValue6))
+			Expect(iterator.Error()).To(BeNil())
+
+			more = iterator.Next()
+			Expect(more).To(BeTrue())
+			Expect(iterator.Key()).To(Equal(prefixedTestEthKey1))
+			Expect(iterator.Value()).To(Equal(mockValue1))
+			Expect(iterator.Error()).To(BeNil())
+
+			more = iterator.Next()
+			Expect(more).To(BeTrue())
+			Expect(iterator.Key()).To(Equal(prefixedTestEthKey2))
+			Expect(iterator.Value()).To(Equal(mockValue2))
+			Expect(iterator.Error()).To(BeNil())
+
+			more = iterator.Next()
+			Expect(more).To(BeTrue())
+			Expect(iterator.Key()).To(Equal(prefixedTestEthKey3))
+			Expect(iterator.Value()).To(Equal(mockValue3))
+			Expect(iterator.Error()).To(BeNil())
+
+			more = iterator.Next()
+			Expect(more).To(BeTrue())
+			Expect(iterator.Key()).To(Equal(prefixedTestEthKey5))
+			Expect(iterator.Value()).To(Equal(mockValue5))
+			Expect(iterator.Error()).To(BeNil())
+
+			more = iterator.Next()
+			Expect(more).To(BeTrue())
+			Expect(iterator.Key()).To(Equal(prefixedTestEthKey4))
+			Expect(iterator.Value()).To(Equal(mockValue4))
+			Expect(iterator.Error()).To(BeNil())
+
+			more = iterator.Next()
+			Expect(more).To(BeTrue())
+			Expect(iterator.Key()).To(Equal(prefixedTestEthKey6))
+			Expect(iterator.Value()).To(Equal(mockValue6))
+			Expect(iterator.Error()).To(BeNil())
+
+			more = iterator.Next()
+			Expect(more).ToNot(BeTrue())
+			Expect(iterator.Value()).To(BeNil())
+			Expect(iterator.Key()).To(BeNil())
+			Expect(iterator.Error()).To(Equal(sql.ErrNoRows))
+		})
+
+		It("iterates over the entire key-set (prefixed or not) starting with at the provided path", func() {
+			iterator = database.NewIteratorWithStart(prefixedTestEthKey3)
+			Expect(iterator.Value()).To(BeNil())
+			Expect(iterator.Key()).To(Equal(prefixedTestEthKey3))
+			Expect(iterator.Error()).To(BeNil())
+
+			more := iterator.Next()
+			Expect(more).To(BeTrue())
+			Expect(iterator.Key()).To(Equal(prefixedTestEthKey3))
+			Expect(iterator.Value()).To(Equal(mockValue3))
+			Expect(iterator.Error()).To(BeNil())
+
+			more = iterator.Next()
+			Expect(more).To(BeTrue())
+			Expect(iterator.Key()).To(Equal(prefixedTestEthKey5))
+			Expect(iterator.Value()).To(Equal(mockValue5))
+			Expect(iterator.Error()).To(BeNil())
+
+			more = iterator.Next()
+			Expect(more).To(BeTrue())
+			Expect(iterator.Key()).To(Equal(prefixedTestEthKey4))
+			Expect(iterator.Value()).To(Equal(mockValue4))
+			Expect(iterator.Error()).To(BeNil())
+
+			more = iterator.Next()
+			Expect(more).To(BeTrue())
+			Expect(iterator.Key()).To(Equal(prefixedTestEthKey6))
+			Expect(iterator.Value()).To(Equal(mockValue6))
+			Expect(iterator.Error()).To(BeNil())
+
+			more = iterator.Next()
+			Expect(more).ToNot(BeTrue())
+			Expect(iterator.Value()).To(BeNil())
+			Expect(iterator.Key()).To(BeNil())
+			Expect(iterator.Error()).To(Equal(sql.ErrNoRows))
+		})
+	})
+
+	Describe("Release", func() {
+		It("releases resources associated with the Iterator", func() {
+			iterator = database.NewIteratorWithStart(testEthKey2)
+			Expect(iterator.Value()).To(BeNil())
+			Expect(iterator.Key()).To(Equal(testEthKey2))
+			Expect(iterator.Error()).To(BeNil())
+
+			more := iterator.Next()
+			Expect(more).To(BeTrue())
+			Expect(iterator.Key()).To(Equal(testEthKey2))
+			Expect(iterator.Value()).To(Equal(mockValue2))
+			Expect(iterator.Error()).To(BeNil())
+
+			iterator.Release()
+			iterator.Release() // check that we don't panic if called multiple times
+
+			Expect(iterator.Value()).To(BeNil())
+			Expect(iterator.Key()).To(BeNil())
+			Expect(iterator.Error()).To(BeNil())
+			Expect(func() { iterator.Next() }).To(Panic()) // check that we panic if we try to use released iterator
+
+			// We can still create a new iterator from the same backing db
+			iterator = database.NewIteratorWithStart(testEthKey2)
+			Expect(iterator.Value()).To(BeNil())
+			Expect(iterator.Key()).To(Equal(testEthKey2))
+			Expect(iterator.Error()).To(BeNil())
+
+			more = iterator.Next()
+			Expect(more).To(BeTrue())
+			Expect(iterator.Key()).To(Equal(testEthKey2))
+			Expect(iterator.Value()).To(Equal(mockValue2))
+			Expect(iterator.Error()).To(BeNil())
+		})
+	})
+})

postgres/key_type.go

@@ -0,0 +1,69 @@
+// VulcanizeDB
+// Copyright © 2020 Vulcanize
+
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// This program 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 Affero General Public License for more details.
+
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+package pgipfsethdb
+
+import "bytes"
+
+type KeyType uint
+
+const (
+	Invalid KeyType = iota
+	Static
+	Keccak
+	Prefixed
+	Suffixed
+	Header
+	Preimage
+)
+
+var (
+	// KeyDelineation is used to delineate the key prefixes and suffixes
+	KeyDelineation = []byte("-fix-")
+
+	// NumberDelineation is used to delineate the block number encoded in a key
+	NumberDelineation = []byte("-nmb-")
+
+	// Data item prefixes (use single byte to avoid mixing data types, avoid `i`, used for indexes).
+	HeaderPrefix   = []byte("h")           // headerPrefix + num (uint64 big endian) + hash -> header
+	PreimagePrefix = []byte("secure-key-") // preimagePrefix + hash -> preimage
+)
+
+// ResolveKeyType returns the key type based on the prefix
+func ResolveKeyType(key []byte) (KeyType, [][]byte) {
+	sk := bytes.Split(key, KeyDelineation)
+
+	// these heuristics are reliant on the current db key patterns
+	switch len(sk) {
+	case 1:
+		if len(sk[0]) < 32 {
+			return Static, sk
+		}
+		return Keccak, sk
+	case 2:
+		switch prefix := sk[0]; {
+		case bytes.Equal(prefix, HeaderPrefix):
+			return Header, bytes.Split(sk[1], NumberDelineation)
+		case bytes.Equal(prefix, PreimagePrefix):
+			return Preimage, sk
+		default:
+			return Prefixed, sk
+		}
+	case 3:
+		return Suffixed, sk
+	}
+	return Invalid, sk
+}

postgres/test_helpers.go

@@ -0,0 +1,67 @@
+// VulcanizeDB
+// Copyright © 2020 Vulcanize
+
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// This program 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 Affero General Public License for more details.
+
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+package pgipfsethdb
+
+import (
+	"github.com/jmoiron/sqlx"
+)
+
+// TestDB connect to the testing database
+// it assumes the database has the IPFS public.blocks table present
+// DO NOT use a production db for the test db, as it will remove all contents of the public.blocks table
+func TestDB() (*sqlx.DB, error) {
+	connectStr := "postgresql://localhost:5432/vulcanize_testing?sslmode=disable"
+	return sqlx.Connect("postgres", connectStr)
+}
+
+// ResetTestDB drops all rows in the test db public.blocks table
+func ResetTestDB(db *sqlx.DB) error {
+	tx, err := db.Beginx()
+	if err != nil {
+		return err
+	}
+	defer func() {
+		if p := recover(); p != nil {
+			tx.Rollback()
+			panic(p)
+		} else if err != nil {
+			tx.Rollback()
+		} else {
+			err = tx.Commit()
+		}
+	}()
+	if _, err := tx.Exec("TRUNCATE public.blocks CASCADE"); err != nil {
+		return err
+	}
+	if _, err := tx.Exec("TRUNCATE eth.key_preimages CASCADE"); err != nil {
+		return err
+	}
+	if _, err := tx.Exec("TRUNCATE eth.ancient_headers CASCADE"); err != nil {
+		return err
+	}
+	if _, err := tx.Exec("TRUNCATE eth.ancient_hashes CASCADE"); err != nil {
+		return err
+	}
+	if _, err := tx.Exec("TRUNCATE eth.ancient_bodies CASCADE"); err != nil {
+		return err
+	}
+	if _, err := tx.Exec("TRUNCATE eth.ancient_receipts CASCADE"); err != nil {
+		return err
+	}
+	_, err = tx.Exec("TRUNCATE eth.ancient_tds CASCADE")
+	return err
+}

postgres/util.go

@@ -17,9 +17,11 @@
 package pgipfsethdb
 
 import (
+	"fmt"
+
+	"github.com/ethereum/go-ethereum/common"
 	"github.com/ipfs/go-ipfs-blockstore"
 	"github.com/ipfs/go-ipfs-ds-help"
-	"github.com/jmoiron/sqlx"
 	_ "github.com/lib/pq" //postgres driver
 	"github.com/multiformats/go-multihash"
 )
@@ -34,16 +36,28 @@ func MultihashKeyFromKeccak256(h []byte) (string, error) {
 	return blockstore.BlockPrefix.String() + dbKey.String(), nil
 }
 
-// TestDB connect to the testing database
+// DatastoreKeyFromGethKey returns the public.blocks key from the provided geth key
-// it assumes the database has the IPFS public.blocks table present
+// It also returns the key's prefix, if it has one
-// DO NOT use a production db for the test db, as it will remove all contents of the public.blocks table
+func DatastoreKeyFromGethKey(h []byte) (string, []byte, error) {
-func TestDB() (*sqlx.DB, error) {
+	keyType, keyComponents := ResolveKeyType(h)
-	connectStr := "postgresql://localhost:5432/vulcanize_testing?sslmode=disable"
+	switch keyType {
-	return sqlx.Connect("postgres", connectStr)
+	case Keccak:
-}
+		mhKey, err := MultihashKeyFromKeccak256(h)
-
+		return mhKey, nil, err
-// ResetTestDB drops all rows in the test db public.blocks table
+	case Header:
-func ResetTestDB(db *sqlx.DB) error {
+		mhKey, err := MultihashKeyFromKeccak256(keyComponents[1])
-	_, err := db.Exec("TRUNCATE public.blocks")
+		return mhKey, keyComponents[0], err
-	return err
+	case Preimage:
+		mhKey, err := MultihashKeyFromKeccak256(keyComponents[1])
+		return mhKey, keyComponents[0], err
+	case Prefixed, Suffixed:
+		// This data is not mapped by hash => content by geth, store it using the prefixed/suffixed key directly
+		// I.e. the public.blocks datastore key == the hex representation of the geth key
+		// Alternatively, decompose the data and derive the hash
+		return common.Bytes2Hex(h), keyComponents[0], nil
+	case Static:
+		return common.Bytes2Hex(h), nil, nil
+	default:
+		return "", nil, fmt.Errorf("invalid formatting of database key: %x", h)
+	}
 }