Merge pull request #94 from vulcanize/documentation-updates

Documentation updates

README.md

@@ -7,35 +7,40 @@
 
 
 ## Table of Contents
-1. [Background](../staging/README.md#background)
+1. [Background](#background)
-1. [Dependencies](../staging/README.md#dependencies)
+1. [Install](#install)
-1. [Install](../staging/README.md#install)
+1. [Usage](#usage)
-1. [Usage](../staging/README.md#usage)
+1. [Contributing](#contributing)
-1. [Tests](../staging/README.md#tests)
+1. [License](#license)
-1. [API](../staging/README.md#API)
-1. [Contributing](../staging/README.md#contributing)
-1. [License](../staging/README.md#license)
 
 
 ## Background
 The same data structures and encodings that make Ethereum an effective and trust-less distributed virtual machine
 complicate data accessibility and usability for dApp developers. VulcanizeDB improves Ethereum data accessibility by
-providing a suite of tools to ease the extraction and transformation of data into a more useful state.
+providing a suite of tools to ease the extraction and transformation of data into a more useful state, including
+allowing for exposing aggregate data from a suite of smart contracts.
 
+VulanizeDB includes processes that sync, transform and expose data. Syncing involves
+querying an Ethereum node and then persisting core data into a Postgres database. Transforming focuses on using previously synced data to
+query for and transform log event and storage data for specifically configured smart contract addresses. Exposing data is a matter of getting
+data from VulcanizeDB's underlying Postgres database and making it accessible.
 
-## Dependencies
+![VulcanizeDB Overview Diagram](documentation/diagrams/vdb-overview.png)
+
+## Install
+
+1. [Dependencies](#dependencies)
+1. [Building the project](#building-the-project)
+1. [Setting up the database](#setting-up-the-database)
+1. [Configuring a synced Ethereum node](#configuring-a-synced-ethereum-node)
+
+### Dependencies
  - Go 1.11+
  - Postgres 11.2
  - Ethereum Node
    - [Go Ethereum](https://ethereum.github.io/go-ethereum/downloads/) (1.8.23+)
    - [Parity 1.8.11+](https://github.com/paritytech/parity/releases)
 
-
-## Install
-1. [Building the project](../staging/README.md#building-the-project)
-1. [Setting up the database](../staging/README.md#setting-up-the-database)
-1. [Configuring a synced Ethereum node](../staging/README.md#configuring-a-synced-ethereum-node)
-
 ### Building the project
 Download the codebase to your local `GOPATH` via:
 
@@ -68,7 +73,8 @@ It can be additionally helpful to add `$GOPATH/bin` to your shell's `$PATH`.
 
     * See below for configuring additional environments
     
-In some cases (such as recent Ubuntu systems), it may be necessary to overcome failures of password authentication from localhost. To allow access on Ubuntu, set localhost connections via hostname, ipv4, and ipv6 from peer/md5 to trust in: /etc/postgresql/<version>/pg_hba.conf
+In some cases (such as recent Ubuntu systems), it may be necessary to overcome failures of password authentication from
+localhost. To allow access on Ubuntu, set localhost connections via hostname, ipv4, and ipv6 from peer/md5 to trust in: /etc/postgresql/<version>/pg_hba.conf
 
 (It should be noted that trusted auth should only be enabled on systems without sensitive data in them: development and local test databases)
 
@@ -80,8 +86,9 @@ In some cases (such as recent Ubuntu systems), it may be necessary to overcome f
         - The IPC file is called `geth.ipc`.
         - The geth IPC file path is printed to the console when you start geth.
         - The default location is:
-          - Mac: `<full home path>/Library/Ethereum`
+          - Mac: `<full home path>/Library/Ethereum/geth.ipc`
           - Linux: `<full home path>/ethereum/geth.ipc`
+        - Note: the geth.ipc file may not exist until you've started the geth process
 
       - For Parity:
         - The IPC file is called `jsonrpc.ipc`.
@@ -98,27 +105,35 @@ In some cases (such as recent Ubuntu systems), it may be necessary to overcome f
 
 
 ## Usage
-Usage is broken up into two processes:
+As mentioned above, VulcanizeDB's processes can be split into three categories: syncing, transforming and exposing data.
 
 ### Data syncing
-To provide data for transformations, raw Ethereum data must first be synced into vDB.
+To provide data for transformations, raw Ethereum data must first be synced into VulcanizeDB.
-This is accomplished through the use of the `headerSync`, `sync`, or `coldImport` commands.
+This is accomplished through the use of the `headerSync`, `fullSync`, or `coldImport` commands.
-These commands are described in detail [here](../staging/documentation/sync.md).
+These commands are described in detail [here](documentation/data-syncing.md).
 
 ### Data transformation
-Contract watchers use the raw data that has been synced into Postgres to filter out and apply transformations to specific data of interest.
+Data transformation uses the raw data that has been synced into Postgres to filter out and apply transformations to
+specific data of interest. Since there are different types of data that may be useful for observing smart contracts, it
+follows that there are different ways to transform this data. We've started by categorizing this into Generic and
+Custom transformers:
 
-There is a built-in `contractWatcher` command which provides generic transformation of most contract data.
+- Generic Contract Transformer: Generic contract transformation can be done using a built-in command,
-The `contractWatcher` command is described further [here](../staging/documentation/contractWatcher.md).
+`contractWatcher`, which transforms contract events provided the contract's ABI is available. It also
+provides some state variable coverage by automating polling of public methods, with some restrictions.
+`contractWatcher` is described further [here](documentation/generic-transformer.md).
 
-In many cases a custom transformer or set of transformers will need to be written to provide complete or more comprehensive coverage or to optimize other aspects of the output for a specific end-use.
+- Custom Transformers: In many cases custom transformers will need to be written to provide
-In this case we have provided the `compose`, `execute`, and `composeAndExecute` commands for running custom transformers from external repositories.
+more comprehensive coverage of contract data. In this case we have provided the `compose`, `execute`, and
+`composeAndExecute` commands for running custom transformers from external repositories. Documentation on how to write,
+build and run custom transformers as Go plugins can be found
+[here](documentation/custom-transformers.md).
 
-Usage of the `compose`, `execute`, and `composeAndExecute` commands is described further [here](../staging/documentation/composeAndExecute.md).
+### Exposing the data
+[Postgraphile](https://www.graphile.org/postgraphile/) is used to expose GraphQL endpoints for our database schemas, this is described in detail [here](documentation/postgraphile.md).
 
-Documentation on how to build custom transformers to work with these commands can be found [here](../staging/documentation/transformers.md).
 
-## Tests
+### Tests
 - Replace the empty `ipcPath` in the `environments/infura.toml` with a path to a full node's eth_jsonrpc endpoint (e.g. local geth node ipc path or infura url)
     - Note: integration tests require configuration with an archival node
 - `createdb vulcanize_private` will create the test db
@@ -126,15 +141,13 @@ Documentation on how to build custom transformers to work with these commands ca
 - `make test` will run the unit tests and skip the integration tests
 - `make integrationtest` will run just the integration tests
 
-## API
-[Postgraphile](https://www.graphile.org/postgraphile/) is used to expose GraphQL endpoints for our database schemas, this is described in detail [here](../staging/documentation/postgraphile.md).
-
 
 ## Contributing
-Contributions are welcome! For more on this, please see [here](../staging/documentation/contributing.md).
+Contributions are welcome!
 
-Small note: If editing the Readme, please conform to the [standard-readme specification](https://github.com/RichardLitt/standard-readme).
+VulcanizeDB follows the [Contributor Covenant Code of Conduct](https://www.contributor-covenant.org/version/1/4/code-of-conduct).
 
+For more information on contributing, please see [here](documentation/contributing.md).
 
 ## License
-[AGPL-3.0](../staging/LICENSE) © Vulcanize Inc
+[AGPL-3.0](LICENSE) © Vulcanize Inc

cmd/contractWatcher.go

@@ -26,7 +26,7 @@ import (
 
 	st "github.com/vulcanize/vulcanizedb/libraries/shared/transformer"
 	ft "github.com/vulcanize/vulcanizedb/pkg/contract_watcher/full/transformer"
-	lt "github.com/vulcanize/vulcanizedb/pkg/contract_watcher/header/transformer"
+	ht "github.com/vulcanize/vulcanizedb/pkg/contract_watcher/header/transformer"
 	"github.com/vulcanize/vulcanizedb/utils"
 )
 
@@ -99,7 +99,7 @@ func contractWatcher() {
 	con.PrepConfig()
 	switch mode {
 	case "header":
-		t = lt.NewTransformer(con, blockChain, &db)
+		t = ht.NewTransformer(con, blockChain, &db)
 	case "full":
 		t = ft.NewTransformer(con, blockChain, &db)
 	default:

cmd/fullSync.go

@@ -29,14 +29,14 @@ import (
 	"github.com/vulcanize/vulcanizedb/utils"
 )
 
-// syncCmd represents the sync command
+// fullSyncCmd represents the fullSync command
-var syncCmd = &cobra.Command{
+var fullSyncCmd = &cobra.Command{
-	Use:   "sync",
+	Use:   "fullSync",
 	Short: "Syncs VulcanizeDB with local ethereum node",
 	Long: `Syncs VulcanizeDB with local ethereum node. Populates
 Postgres with blocks, transactions, receipts, and logs.
 
-./vulcanizedb sync --starting-block-number 0 --config public.toml
+./vulcanizedb fullSync --starting-block-number 0 --config public.toml
 
 Expects ethereum node to be running and requires a .toml config:
 
@@ -49,14 +49,14 @@ Expects ethereum node to be running and requires a .toml config:
   ipcPath = "/Users/user/Library/Ethereum/geth.ipc"
 `,
 	Run: func(cmd *cobra.Command, args []string) {
-		sync()
+		fullSync()
 	},
 }
 
 func init() {
-	rootCmd.AddCommand(syncCmd)
+	rootCmd.AddCommand(fullSyncCmd)
 
-	syncCmd.Flags().Int64VarP(&startingBlockNumber, "starting-block-number", "s", 0, "Block number to start syncing from")
+	fullSyncCmd.Flags().Int64VarP(&startingBlockNumber, "starting-block-number", "s", 0, "Block number to start syncing from")
 }
 
 func backFillAllBlocks(blockchain core.BlockChain, blockRepository datastore.BlockRepository, missingBlocksPopulated chan int, startingBlockNumber int64) {
@@ -67,20 +67,20 @@ func backFillAllBlocks(blockchain core.BlockChain, blockRepository datastore.Blo
 	missingBlocksPopulated <- populated
 }
 
-func sync() {
+func fullSync() {
 	ticker := time.NewTicker(pollingInterval)
 	defer ticker.Stop()
 
 	blockChain := getBlockChain()
 	lastBlock, err := blockChain.LastBlock()
 	if err != nil {
-		log.Error("sync: Error getting last block: ", err)
+		log.Error("fullSync: Error getting last block: ", err)
 	}
 	if lastBlock.Int64() == 0 {
 		log.Fatal("geth initial: state sync not finished")
 	}
 	if startingBlockNumber > lastBlock.Int64() {
-		log.Fatal("sync: starting block number > current block number")
+		log.Fatal("fullSync: starting block number > current block number")
 	}
 
 	db := utils.LoadPostgres(databaseConfig, blockChain.Node())
@@ -94,7 +94,7 @@ func sync() {
 		case <-ticker.C:
 			window, err := validator.ValidateBlocks()
 			if err != nil {
-				log.Error("sync: error in validateBlocks: ", err)
+				log.Error("fullSync: error in validateBlocks: ", err)
 			}
 			log.Info(window.GetString())
 		case <-missingBlocksPopulated:

documentation/contributing.md

@@ -1,11 +1,25 @@
 # Contribution guidelines
 
-Contributions are welcome! In addition to core contributions, developers are encouraged to build their own custom transformers which
+Contributions are welcome! Please open an Issues or Pull Request for any changes.
+
+In addition to core contributions, developers are encouraged to build their own custom transformers which
 can be run together with other custom transformers using the [composeAndExeucte](../../staging/documentation/composeAndExecute.md) command.
 
+## Pull Requests
+- `go fmt` is run as part of `make test` and `make integrationtest`, please make sure to check in the format changes.
+- Ensure that new code is well tested, including integration testing if applicable.
+- Make sure the build is passing.
+- Update the README or any [documentation files](./) as necessary. If editing the Readme, please
+conform to the
+[standard-readme specification](https://github.com/RichardLitt/standard-readme).
+- Once a Pull Request has received two approvals it can be merged in by a core developer.
+
 ## Creating a new migration file
 1. `make new_migration NAME=add_columnA_to_table1`
     - This will create a new timestamped migration file in `db/migrations`
 1. Write the migration code in the created file, under the respective `goose` pragma
     - Goose automatically runs each migration in a transaction; don't add `BEGIN` and `COMMIT` statements.
-1. Core migrations should be committed in their `goose fix`ed form.
+1. Core migrations should be committed in their `goose fix`ed form. To do this, run `make version_migrations` which
+converts timestamped migrations to migrations versioned by an incremented integer.
+
+VulcanizeDB follows the [Contributor Covenant Code of Conduct](https://www.contributor-covenant.org/version/1/4/code-of-conduct).

documentation/custom-transformers.md

@@ -1,44 +1,80 @@
-# composeAndExecute
+# Custom Transformers
-The `composeAndExecute` command is used to compose and execute over an arbitrary set of custom transformers.
+When the capabilities of the generic `contractWatcher` are not sufficient, custom transformers tailored to a specific
-This is accomplished by generating a Go pluggin which allows the `vulcanizedb` binary to link to external transformers, so
+purpose can be leveraged.
-long as they abide by one of the standard [interfaces](../staging/libraries/shared/transformer).
 
-Additionally, there are separate `compose` and `execute` commands to allow pre-building and linking to a pre-built .so file.
+Individual custom transformers can be composed together from any number of external repositories and executed as a 
+single process using the `compose` and `execute` commands or the `composeAndExecute` command. This is accomplished by
+generating a Go plugin which allows the `vulcanizedb` binary to link to the external transformers, so long as they 
+abide by one of the standard [interfaces](../staging/libraries/shared/transformer).
 
-**NOTE:**
+## Writing custom transformers
-1. It is necessary that the .so file was built with the same exact dependencies that are present in the execution environment,
+For help with writing different types of custom transformers please see below:
-i.e. we need to `compose` and `execute` the plugin .so file with the same exact version of vulcanizeDB.
-1. The plugin migrations are run during the plugin's composition. As such, if `execute` is used to run a prebuilt .so in a different
-environment than the one it was composed in then the migrations for that plugin will first need to be manually ran against that environment's Postgres database.
 
-These commands require Go 1.11+ and use [Go plugins](https://golang.org/pkg/plugin/) which only work on Unix-based systems.
+Storage Transformers: transform data derived from contract storage tries
-There is also an ongoing [conflict](https://github.com/golang/go/issues/20481) between Go plugins and the use vendored dependencies which
+   * [Guide](../../staging/libraries/shared/factories/storage/README.md)
-imposes certain limitations on how the plugins are built.
+   * [Example](../../staging/libraries/shared/factories/storage/EXAMPLE.md)
 
-## Commands
+Event Transformers: transform data derived from Ethereum log events
-The `compose` and `composeAndExecute` commands assume you are in the vulcanizdb directory located at your system's `$GOPATH`,
+   * [Guide](../../staging/libraries/shared/factories/event/README.md)
-and that all of the transformer repositories for building the plugin are present at their `$GOPATH` directories.
+   * [Example 1](https://github.com/vulcanize/ens_transformers/tree/master/transformers/registar)
+   * [Example 2](https://github.com/vulcanize/ens_transformers/tree/master/transformers/registry)
+   * [Example 3](https://github.com/vulcanize/ens_transformers/tree/master/transformers/resolver)
 
-The `execute` command does not require the plugin transformer dependencies be located in their
+Contract Transformers: transform data derived from Ethereum log events and use it to poll public contract methods
-`$GOPATH` directories, instead it expects a prebuilt .so file (of the name specified in the config file)
+   * [Example 1](https://github.com/vulcanize/account_transformers)
-to be in `$GOPATH/src/github.com/vulcanize/vulcanizedb/plugins/` and, as noted above, also expects the plugin
+   * [Example 2](https://github.com/vulcanize/ens_transformers/tree/master/transformers/domain_records)
-db migrations to have already been ran against the database.
 
-compose:
+## Preparing custom transformers to work as part of a plugin
+To plug in an external transformer we need to:
 
-`./vulcanizedb compose --config=./environments/config_name.toml`
+1. Create a package that exports a variable `TransformerInitializer`, `StorageTransformerInitializer`, or `ContractTransformerInitializer` that are of type [TransformerInitializer](../staging/libraries/shared/transformer/event_transformer.go#L33)
+or [StorageTransformerInitializer](../../staging/libraries/shared/transformer/storage_transformer.go#L31),
+or [ContractTransformerInitializer](../../staging/libraries/shared/transformer/contract_transformer.go#L31), respectively
+2. Design the transformers to work in the context of their [event](../staging/libraries/shared/watcher/event_watcher.go#L83),
+[storage](../../staging/libraries/shared/watcher/storage_watcher.go#L53),
+or [contract](../../staging/libraries/shared/watcher/contract_watcher.go#L68) watcher execution modes
+3. Create db migrations to run against vulcanizeDB so that we can store the transformer output
+    * Do not `goose fix` the transformer migrations, this is to ensure they are always ran after the core vulcanizedb migrations which are kept in their fixed form
+    * Specify migration locations for each transformer in the config with the `exporter.transformer.migrations` fields
+    * If the base vDB migrations occupy this path as well, they need to be in their `goose fix`ed form
+    as they are [here](../../staging/db/migrations)
 
-execute:
+To update a plugin repository with changes to the core vulcanizedb repository, run `dep ensure` to update its dependencies.
 
-`./vulcanizedb execute --config=./environments/config_name.toml`
+## Building and Running Custom Transformers
+### Commands
+* The `compose`, `execute`, `composeAndExecute` commands require Go 1.11+ and use [Go plugins](https://golang
+.org/pkg/plugin/) which only work on Unix-based systems.
 
-composeAndExecute:
+* There is an ongoing [conflict](https://github.com/golang/go/issues/20481) between Go plugins and the use of vendored
+dependencies which imposes certain limitations on how the plugins are built.
 
-`./vulcanizedb composeAndExecute --config=./environments/config_name.toml`
+* Separate `compose` and `execute` commands allow pre-building and linking to the pre-built .so file. So, if
+these are run independently, instead of using `composeAndExecute`, a couple of things need to be considered:
+    * It is necessary that the .so file was built with the same exact dependencies that are present in the execution
+    environment, i.e. we need to `compose` and `execute` the plugin .so file with the same exact version of vulcanizeDB.
+    * The plugin migrations are run during the plugin's composition. As such, if `execute` is used to run a prebuilt .so
+    in a different environment than the one it was composed in, then the database structure will need to be loaded 
+    into the environment's Postgres database. This can either be done by manually loading the plugin's schema into 
+    Postgres, or by manually running the plugin's migrations.
      
-## Flags
+* The `compose` and `composeAndExecute` commands assume you are in the vulcanizdb directory located at your system's 
+`$GOPATH`, and that the plugin dependencies are present at their `$GOPATH` directories.
 
-The `compose` and `composeAndExecute` commands can be passed optional flags to specify the operation of the watchers:
+* The `execute` command does not require the plugin transformer dependencies be located in their `$GOPATH` directories,
+instead it expects a .so file (of the name specified in the config file) to be in
+`$GOPATH/src/github.com/vulcanize/vulcanizedb/plugins/` and, as noted above, also expects the plugin db migrations to
+ have already been ran against the database.
+
+ * Usage:
+     * compose: `./vulcanizedb compose --config=environments/config_name.toml`
+
+     * execute: `./vulcanizedb execute --config=environments/config_name.toml`
+
+     * composeAndExecute: `./vulcanizedb composeAndExecute --config=environments/config_name.toml`
+
+### Flags
+The `execute` and `composeAndExecute` commands can be passed optional flags to specify the operation of the watchers:
 
 - `--recheck-headers`/`-r` - specifies whether to re-check headers for events after the header has already been queried for watched logs.
 Can be useful for redundancy if you suspect that your node is not always returning all desired logs on every query.
@@ -50,7 +86,7 @@ Defaults to `false`.
 Argument is expected to be a duration (integer measured in nanoseconds): e.g. `-q=10m30s` (for 10 minute, 30 second intervals).
 Defaults to `5m` (5 minutes).
 
-## Configuration
+### Configuration
 A .toml config file is specified when executing the commands.
 The config provides information for composing a set of transformers from external repositories:
 

documentation/data-syncing.md

@@ -0,0 +1,81 @@
+# Syncing commands
+These commands are used to sync raw Ethereum data into Postgres, with varying levels of data granularity.
+
+## headerSync
+Syncs block headers from a running Ethereum node into the VulcanizeDB table `headers`.
+- Queries the Ethereum node using RPC calls.
+- Validates headers from the last 15 blocks to ensure that data is up to date.
+- Useful when you want a minimal baseline from which to track targeted data on the blockchain (e.g. individual smart
+contract storage values or event logs).
+- Handles chain reorgs by [validating the most recent blocks' hashes](../pkg/history/header_validator.go). If the hash is
+different from what we have already stored in the database, the header record will be updated.
+
+#### Usage
+- Run: `./vulcanizedb headerSync --config <config.toml> --starting-block-number <block-number>`
+- The config file must be formatted as follows, and should contain an ipc path to a running Ethereum node:
+```toml
+[database]
+    name     = "vulcanize_public"
+    hostname = "localhost"
+    user     = "vulcanize"
+    password = "vulcanize"
+    port     = 5432
+
+[client]
+    ipcPath  = <path to a running Ethereum node>
+```
+- Alternatively, the ipc path can be passed as a flag instead `--client-ipcPath`.
+
+## fullSync
+Syncs blocks, transactions, receipts and logs from a running Ethereum node into VulcanizeDB tables named
+`blocks`, `uncles`, `full_sync_transactions`, `full_sync_receipts` and `logs`. 
+- Queries the Ethereum node using RPC calls.
+- Validates headers from the last 15 blocks to ensure that data is up to date.
+- Useful when you want to maintain a broad cache of what's happening on the blockchain.
+- Handles chain reorgs by [validating the most recent blocks' hashes](../pkg/history/header_validator.go). If the hash is
+different from what we have already stored in the database, the header record will be updated.
+
+#### Usage
+- Run `./vulcanizedb fullSync --config <config.toml> --starting-block-number <block-number>`
+- The config file must be formatted as follows, and should contain an ipc path to a running Ethereum node:
+```toml
+[database]
+    name     = "vulcanize_public"
+    hostname = "localhost"
+    user     = "vulcanize"
+    password = "vulcanize"
+    port     = 5432
+
+[client]
+    ipcPath  = <path to a running Ethereum node>
+```
+- Alternatively, the ipc path can be passed as a flag instead `--client-ipcPath`.
+
+*Please note, that if you are fast syncing your Ethereum node, wait for the initial sync to finish.*
+
+## coldImport
+Syncs VulcanizeDB from Geth's underlying LevelDB datastore and persists Ethereum blocks, 
+transactions, receipts and logs into VulcanizeDB tables named `blocks`, `uncles`, 
+`full_sync_transactions`, `full_sync_receipts` and `logs` respectively.
+
+#### Usage
+1. Ensure the Ethereum node you're point at is not running, and that it has synced to the desired block height.
+1. Run `./vulcanizedb coldImport --config <config.toml>`
+1. Optional flags:
+    - `--starting-block-number <block number>`/`-s <block number>`: block number to start syncing from
+    - `--ending-block-number <block number>`/`-e <block number>`: block number to sync to
+    - `--all`/`-a`: sync all missing blocks
+
+The config file can be formatted as follows, and must contain the LevelDB path.
+
+```toml
+[database]
+    name     = "vulcanize_public"
+    hostname = "localhost"
+    user     = "vulcanize"
+    password = "vulcanize"
+    port     = 5432
+
+[client]
+    leveldbpath = "/Users/user/Library/Ethereum/geth/chaindata"
+```

documentation/generic-transformer.md

@@ -1,4 +1,4 @@
-# contractWatcher
+# Generic Transformer
 The `contractWatcher` command is a built-in generic contract watcher. It can watch any and all events for a given contract provided the contract's ABI is available.
 It also provides some state variable coverage by automating polling of public methods, with some restrictions:
 1. The method must have 2 or less arguments

documentation/postgraphile.md

@@ -9,13 +9,15 @@ As of April 30, 2019, you can run Postgraphile pointed at the default `vulcanize
 
 ```
 npm install -g postgraphile
-postgraphile --connection postgres://localhost/vulcanize_public --schema=public,custom --disable-default-mutations
+postgraphile --connection postgres://localhost/vulcanize_public --schema=public,custom --disable-default-mutations --no-ignore-rbac
 ```
 
 Arguments:
-- `--connection` specifies the database. The above command connects to the default `vulcanize_public` database defined in [the example config](../staging/environments/public.toml.example).
+- `--connection` specifies the database. The above command connects to the default `vulcanize_public` database 
+defined in [the example config](../environments/public.toml.example).
 - `--schema` defines what schema(s) to expose. The above exposes the `public` schema (for core VulcanizeDB data) as well as a `custom` schema (where `custom` is the name of a schema defined in executed transformers).
 - `--disable-default-mutations` prevents Postgraphile from exposing create, update, and delete operations on your data, which are otherwise enabled by default.
+- `--no-ignore-rbac` ensures that Postgraphile will only expose the tables, columns, fields, and query functions that the user has explicit access to.
 
 ## Customizing Postgraphile
 

documentation/repository-maintenance.md

@@ -0,0 +1,27 @@
+# Repository Maintenance
+
+## Diagrams
+- Diagrams were created with [draw.io](draw.io).
+- To update a diagram:
+  1. Go to [draw.io](draw.io).
+  1. Click on *File > Open from* and choose the location of the diagram you want to update.
+  1. Once open in draw.io, you may update it.
+  1. Export the diagram to this repository's directory and add commit it.
+  
+  
+## Generating the Changelog
+We use [github-changelog-generator](https://github.com/github-changelog-generator/github-changelog-generator) to 
+generate release Changelogs. To be consistent with previous Changelogs, the following flags should be passed to the 
+command:
+
+```
+--user vulcanize
+--project vulcanizedb
+--token {YOUR_GITHUB_TOKEN}
+--no-issues
+--usernames-as-github-logins
+--since-tag {PREVIOUS_RELEASE_TAG}
+```
+
+More information on why your github token is needed, and how to generate it here:https://github
+.com/github-changelog-generator/github-changelog-generator#github-token 

documentation/sync.md

@@ -1,26 +0,0 @@
-# Syncing commands
-These commands are used to sync raw Ethereum data into Postgres.
-
-## headerSync
-Syncs VulcanizeDB with the configured Ethereum node, populating only block headers.
-This command is useful when you want a minimal baseline from which to track targeted data on the blockchain (e.g. individual smart contract storage values or event logs).
-1. Start Ethereum node
-1. In a separate terminal start VulcanizeDB:
-    - `./vulcanizedb headerSync --config <config.toml> --starting-block-number <block-number>`
-    
-## sync
-Syncs VulcanizeDB with the configured Ethereum node, populating blocks, transactions, receipts, and logs.
-This command is useful when you want to maintain a broad cache of what's happening on the blockchain.
-1. Start Ethereum node (**if fast syncing your Ethereum node, wait for initial sync to finish**)
-1. In a separate terminal start VulcanizeDB:
-    - `./vulcanizedb sync --config <config.toml> --starting-block-number <block-number>`
-
-## coldImport
-Sync VulcanizeDB from the LevelDB underlying a Geth node.
-1. Assure node is not running, and that it has synced to the desired block height.
-1. Start vulcanize_db
-   - `./vulcanizedb coldImport --config <config.toml>`
-1. Optional flags:
-    - `--starting-block-number <block number>`/`-s <block number>`: block number to start syncing from
-    - `--ending-block-number <block number>`/`-e <block number>`: block number to sync to
-    - `--all`/`-a`: sync all missing blocks

documentation/transformers.md

@@ -1,40 +0,0 @@
-# Custom transformers
-When the capabilities of the generic `contractWatcher` are not sufficient, custom transformers tailored to a specific
-purpose can be leveraged.
-
-Individual transformers can be composed together from any number of external repositories and executed as a single process using
-the `compose` and `execute` commands or the `composeAndExecute` command.
-
-## Writing custom transformers
-For help with writing different types of custom transformers for the `composeAndExecute` set of commands, please see the below:
-
-Storage Transformers
-   * [Guide](../../staging/libraries/shared/factories/storage/README.md)
-   * [Example](../../staging/libraries/shared/factories/storage/EXAMPLE.md)
-
-Event Transformers
-   * [Guide](../../staging/libraries/shared/factories/event/README.md)
-   * [Example 1](https://github.com/vulcanize/ens_transformers/tree/master/transformers/registar)
-   * [Example 2](https://github.com/vulcanize/ens_transformers/tree/master/transformers/registry)
-   * [Example 3](https://github.com/vulcanize/ens_transformers/tree/master/transformers/resolver)
-
-Contract Transformers
-   * [Example 1](https://github.com/vulcanize/account_transformers)
-   * [Example 2](https://github.com/vulcanize/ens_transformers/tree/master/transformers/domain_records)
-
-## Preparing custom transformers to work as part of a plugin
-To plug in an external transformer we need to:
-
-1. Create a package that exports a variable `TransformerInitializer`, `StorageTransformerInitializer`, or `ContractTransformerInitializer` that are of type [TransformerInitializer](../staging/libraries/shared/transformer/event_transformer.go#L33)
-or [StorageTransformerInitializer](../../staging/libraries/shared/transformer/storage_transformer.go#L31),
-or [ContractTransformerInitializer](../../staging/libraries/shared/transformer/contract_transformer.go#L31), respectively
-2. Design the transformers to work in the context of their [event](../staging/libraries/shared/watcher/event_watcher.go#L83),
-[storage](../../staging/libraries/shared/watcher/storage_watcher.go#L53),
-or [contract](../../staging/libraries/shared/watcher/contract_watcher.go#L68) watcher execution modes
-3. Create db migrations to run against vulcanizeDB so that we can store the transformer output
-    * Do not `goose fix` the transformer migrations, this is to ensure they are always ran after the core vulcanizedb migrations which are kept in their fixed form
-    * Specify migration locations for each transformer in the config with the `exporter.transformer.migrations` fields
-    * If the base vDB migrations occupy this path as well, they need to be in their `goose fix`ed form
-    as they are [here](../../staging/db/migrations)
-
-To update a plugin repository with changes to the core vulcanizedb repository, run `dep ensure` to update its dependencies.

pkg/contract_watcher/full/transformer/transformer.go

@@ -164,7 +164,7 @@ func (tr *Transformer) Init() error {
 // Iterates through stored, initialized contract objects
 // Iterates through contract's event filters, grabbing watched event logs
 // Uses converter to convert logs into custom log type
-// Persists converted logs into custuom postgres tables
+// Persists converted logs into custom postgres tables
 // Calls selected methods, using token holder address generated during event log conversion
 func (tr *Transformer) Execute() error {
 	if len(tr.Contracts) == 0 {

pkg/core/blockchain.go

@@ -30,7 +30,7 @@ type BlockChain interface {
 	GetBlockByNumber(blockNumber int64) (Block, error)
 	GetEthLogsWithCustomQuery(query ethereum.FilterQuery) ([]types.Log, error)
 	GetHeaderByNumber(blockNumber int64) (Header, error)
-	GetHeaderByNumbers(blockNumbers []int64) ([]Header, error)
+	GetHeadersByNumbers(blockNumbers []int64) ([]Header, error)
 	GetLogs(contract Contract, startingBlockNumber *big.Int, endingBlockNumber *big.Int) ([]Log, error)
 	GetTransactions(transactionHashes []common.Hash) ([]TransactionModel, error)
 	LastBlock() (*big.Int, error)

pkg/fakes/mock_blockchain.go

@@ -98,7 +98,7 @@ func (chain *MockBlockChain) GetHeaderByNumber(blockNumber int64) (core.Header,
 	return core.Header{BlockNumber: blockNumber}, nil
 }
 
-func (chain *MockBlockChain) GetHeaderByNumbers(blockNumbers []int64) ([]core.Header, error) {
+func (chain *MockBlockChain) GetHeadersByNumbers(blockNumbers []int64) ([]core.Header, error) {
 	var headers []core.Header
 	for _, blockNumber := range blockNumbers {
 		var header = core.Header{BlockNumber: int64(blockNumber)}

pkg/geth/blockchain.go

@@ -79,7 +79,7 @@ func (blockChain *BlockChain) GetHeaderByNumber(blockNumber int64) (header core.
 	return blockChain.getPOWHeader(blockNumber)
 }
 
-func (blockChain *BlockChain) GetHeaderByNumbers(blockNumbers []int64) (header []core.Header, err error) {
+func (blockChain *BlockChain) GetHeadersByNumbers(blockNumbers []int64) (header []core.Header, err error) {
 	if blockChain.node.NetworkID == core.KOVAN_NETWORK_ID {
 		return blockChain.getPOAHeaders(blockNumbers)
 	}

pkg/geth/blockchain_test.go

@@ -93,7 +93,7 @@ var _ = Describe("Geth blockchain", func() {
 			})
 
 			It("fetches headers with multiple blocks", func() {
-				_, err := blockChain.GetHeaderByNumbers([]int64{100, 99})
+				_, err := blockChain.GetHeadersByNumbers([]int64{100, 99})
 
 				Expect(err).NotTo(HaveOccurred())
 				mockRpcClient.AssertBatchCalledWith("eth_getBlockByNumber", 2)
@@ -139,7 +139,7 @@ var _ = Describe("Geth blockchain", func() {
 				blockNumber := hexutil.Big(*big.NewInt(100))
 				mockRpcClient.SetReturnPOAHeaders([]vulcCore.POAHeader{{Number: &blockNumber}})
 
-				_, err := blockChain.GetHeaderByNumbers([]int64{100, 99})
+				_, err := blockChain.GetHeadersByNumbers([]int64{100, 99})
 
 				Expect(err).NotTo(HaveOccurred())
 				mockRpcClient.AssertBatchCalledWith("eth_getBlockByNumber", 2)

pkg/history/populate_headers.go

@@ -24,14 +24,14 @@ import (
 	"github.com/vulcanize/vulcanizedb/pkg/datastore/postgres/repositories"
 )
 
-func PopulateMissingHeaders(blockchain core.BlockChain, headerRepository datastore.HeaderRepository, startingBlockNumber int64) (int, error) {
+func PopulateMissingHeaders(blockChain core.BlockChain, headerRepository datastore.HeaderRepository, startingBlockNumber int64) (int, error) {
-	lastBlock, err := blockchain.LastBlock()
+	lastBlock, err := blockChain.LastBlock()
 	if err != nil {
 		log.Error("PopulateMissingHeaders: Error getting last block: ", err)
 		return 0, err
 	}
 
-	blockNumbers, err := headerRepository.MissingBlockNumbers(startingBlockNumber, lastBlock.Int64(), blockchain.Node().ID)
+	blockNumbers, err := headerRepository.MissingBlockNumbers(startingBlockNumber, lastBlock.Int64(), blockChain.Node().ID)
 	if err != nil {
 		log.Error("PopulateMissingHeaders: Error getting missing block numbers: ", err)
 		return 0, err
@@ -40,7 +40,7 @@ func PopulateMissingHeaders(blockchain core.BlockChain, headerRepository datasto
 	}
 
 	log.Printf("Backfilling %d blocks\n\n", len(blockNumbers))
-	_, err = RetrieveAndUpdateHeaders(blockchain, headerRepository, blockNumbers)
+	_, err = RetrieveAndUpdateHeaders(blockChain, headerRepository, blockNumbers)
 	if err != nil {
 		log.Error("PopulateMissingHeaders: Error getting/updating headers:", err)
 		return 0, err
@@ -48,8 +48,8 @@ func PopulateMissingHeaders(blockchain core.BlockChain, headerRepository datasto
 	return len(blockNumbers), nil
 }
 
-func RetrieveAndUpdateHeaders(chain core.BlockChain, headerRepository datastore.HeaderRepository, blockNumbers []int64) (int, error) {
+func RetrieveAndUpdateHeaders(blockChain core.BlockChain, headerRepository datastore.HeaderRepository, blockNumbers []int64) (int, error) {
-	headers, err := chain.GetHeaderByNumbers(blockNumbers)
+	headers, err := blockChain.GetHeadersByNumbers(blockNumbers)
 	for _, header := range headers {
 		_, err = headerRepository.CreateOrUpdateHeader(header)
 		if err != nil {