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README.md
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README.md
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# Vulcanize DB
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[![Join the chat at https://gitter.im/vulcanizeio/VulcanizeDB](https://badges.gitter.im/vulcanizeio/VulcanizeDB.svg)](https://gitter.im/vulcanizeio/VulcanizeDB?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
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[![Build Status](https://travis-ci.com/vulcanize/maker-vulcanizedb.svg?token=MKcE2K7CRvKtdxSSnbap&branch=staging)](https://travis-ci.com/vulcanize/maker-vulcanizedb)
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[![Build Status](https://travis-ci.org/vulcanize/vulcanizedb.svg?branch=master)](https://travis-ci.org/vulcanize/vulcanizedb)
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## About
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@ -41,7 +39,6 @@ In order to install packages with `dep`, ensure you are in the project directory
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After `dep` finishes, dependencies should be installed within your `GOPATH` at the versions specified in `Gopkg.toml`.
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Because we are working with a modified version of the go-ethereum accounts/abi package, after running `dep ensure` you will need to run `git checkout vendor/github/ethereum/go-ethereum/accounts/abi` to checkout the modified dependency.
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This is explained in greater detail [here](https://github.com/vulcanize/maker-vulcanizedb/issues/41).
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Lastly, ensure that `GOPATH` is defined in your shell. If necessary, `GOPATH` can be set in `~/.bashrc` or `~/.bash_profile`, depending upon your system. It can be additionally helpful to add `$GOPATH/bin` to your shell's `$PATH`.
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@ -318,17 +315,17 @@ Also notice that the contract address used for the schema name has been down-cas
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## composeAndExecute
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The `composeAndExecute` command is used to compose and execute over an arbitrary set of custom transformers.
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This is accomplished by generating a Go pluggin which allows our `vulcanizedb` binary to link to external transformers, so
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long as they abide by our standard [interfaces](https://github.com/vulcanize/maker-vulcanizedb/tree/compose_and_execute/libraries/shared/transformer).
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long as they abide by our standard [interfaces](../staging/libraries/shared/transformer).
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This command requires Go 1.11+ and [Go plugins](https://golang.org/pkg/plugin/) only work on Unix based systems.
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### Writing custom transformers
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Storage Transformers
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* [Guide](https://github.com/vulcanize/maker-vulcanizedb/blob/compose_and_execute/libraries/shared/factories/storage/README.md)
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* [Example](https://github.com/vulcanize/maker-vulcanizedb/blob/compose_and_execute/libraries/shared/factories/storage/EXAMPLE.md)
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* [Guide](../staging/libraries/shared/factories/storage/README.md)
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* [Example](../staging/libraries/shared/factories/storage/EXAMPLE.md)
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Event Transformers
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* [Guide](https://github.com/vulcanize/maker-vulcanizedb/blob/event_docs/libraries/shared/factories/README.md)
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* [Guide](../staging/libraries/shared/factories/event/README.md)
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* [Example](https://github.com/vulcanize/ens_transformers/tree/working)
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### composeAndExecute configuration
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@ -392,12 +389,12 @@ The config provides information for composing a set of transformers:
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- `path` is the relative path from `repository` to the transformer's `TransformerInitializer` directory (initializer package).
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- Transformer repositories need to be cloned into the user's $GOPATH (`go get`)
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- `type` is the type of the transformer; indicating which type of watcher it works with (for now, there are only two options: `eth_event` and `eth_storage`)
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- `eth_storage` indicates the transformer works with the [storage watcher](https://github.com/vulcanize/maker-vulcanizedb/blob/staging/libraries/shared/watcher/storage_watcher.go)
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- `eth_storage` indicates the transformer works with the [storage watcher](../staging/libraries/shared/watcher/storage_watcher.go)
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that fetches state and storage diffs from an ETH node (instead of, for example, from IPFS)
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- `eth_event` indicates the transformer works with the [event watcher](https://github.com/vulcanize/maker-vulcanizedb/blob/staging/libraries/shared/watcher/event_watcher.go)
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- `eth_event` indicates the transformer works with the [event watcher](../staging/libraries/shared/watcher/event_watcher.go)
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that fetches event logs from an ETH node
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- `eth_contract` indicates the transformer works with the [contract watcher](https://github.com/vulcanize/maker-vulcanizedb/blob/omni_update/libraries/shared/watcher/generic_watcher.go)
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that is made to work with [contract_watcher pkg](https://github.com/vulcanize/maker-vulcanizedb/tree/staging/pkg/omni)
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- `eth_contract` indicates the transformer works with the [contract watcher](../staging/libraries/shared/watcher/contract_watcher.go)
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that is made to work with [contract_watcher pkg](../staging/pkg/contract_watcher)
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based transformers which work with either a light or full sync vDB to watch events and poll public methods ([example](https://github.com/vulcanize/ens_transformers/blob/working/transformers/domain_records/transformer.go))
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- `migrations` is the relative path from `repository` to the db migrations directory for the transformer
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- `rank` determines the order that migrations are ran, with lower ranked migrations running first
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@ -446,12 +443,12 @@ func (e exporter) Export() []interface1.EventTransformerInitializer, []interface
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To plug in an external transformer we need to:
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* Create a [package](https://github.com/vulcanize/ens_transformers/blob/working/transformers/registry/new_owner/initializer/initializer.go)
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that exports a variable `TransformerInitializer`, `StorageTransformerInitializer`, or `ContractTransformerInitializer` that are of type [TransformerInitializer](https://github.com/vulcanize/maker-vulcanizedb/blob/compose_and_execute/libraries/shared/transformer/event_transformer.go#L33)
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or [StorageTransformerInitializer](https://github.com/vulcanize/maker-vulcanizedb/blob/compose_and_execute/libraries/shared/transformer/storage_transformer.go#L31),
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or [ContractTransformerInitializer](https://github.com/vulcanize/maker-vulcanizedb/blob/omni_update/libraries/shared/transformer/contract_transformer.go#L31), respectively
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* Design the transformers to work in the context of their [event](https://github.com/vulcanize/maker-vulcanizedb/blob/compose_and_execute/libraries/shared/watcher/event_watcher.go#L83),
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[storage](https://github.com/vulcanize/maker-vulcanizedb/blob/compose_and_execute/libraries/shared/watcher/storage_watcher.go#L53),
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or [contract](https://github.com/vulcanize/maker-vulcanizedb/blob/omni_update/libraries/shared/watcher/contract_watcher.go#L68) watcher execution modes
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that exports a variable `TransformerInitializer`, `StorageTransformerInitializer`, or `ContractTransformerInitializer` that are of type [TransformerInitializer](../staging/libraries/shared/transformer/event_transformer.go#L33)
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or [StorageTransformerInitializer](../staging/libraries/shared/transformer/storage_transformer.go#L31),
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or [ContractTransformerInitializer](../staging/libraries/shared/transformer/contract_transformer.go#L31), respectively
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* Design the transformers to work in the context of their [event](../staging/libraries/shared/watcher/event_watcher.go#L83),
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[storage](../staging/libraries/shared/watcher/storage_watcher.go#L53),
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or [contract](../staging/libraries/shared/watcher/contract_watcher.go#L68) watcher execution modes
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* Create db migrations to run against vulcanizeDB so that we can store the transformer output
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* Do not `goose fix` the transformer migrations
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* Specify migration locations for each transformer in the config with the `exporter.transformer.migrations` fields
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VulcanizeDB has shared code built out for building and plugging in event transformers
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### [Event Watcher (light sync)](https://github.com/vulcanize/maker-vulcanizedb/blob/staging/libraries/shared/watcher/event_watcher.go)
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### [Event Watcher (light sync)](../staging/libraries/shared/watcher/event_watcher.go)
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The event watcher is responsible for continuously fetching and delegating chunks of logs and their associated header to the appropriate transformers.
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Using the `compose` or `composeAndExecute` command, event watchers can be loaded with plugin event transformers and execute over them.
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### [Event Transformer](https://github.com/vulcanize/maker-vulcanizedb/blob/staging/libraries/shared/transformer/event_transformer.go)
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### [Event Transformer](../staging/libraries/shared/transformer/event_transformer.go)
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The event transformer is responsible for converting event logs into more useful data objects and storing them in Postgres.
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The event transformer is composed of converter and repository interfaces and a config struct:
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@ -371,10 +371,10 @@ ALTER TABLE public.checked_headers
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-- +goose Down
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DROP TABLE maker.bite;
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DROP TABLE example_schema.example_event;
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ALTER TABLE public.checked_headers
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DROP COLUMN bite_checked;
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DROP COLUMN example_event_checked;
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```
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Notice that we have also added a column to the `checked_headers` table for this event so that we can keep track
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@ -385,4 +385,4 @@ of which headers we have already filtered through for this event.
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To create a transformer for a contract event we need to create entities for unpacking the raw log, models to represent
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the final data structure, a converter to mediate this unpacking and conversion between entities to models, a repository to write
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these models to Postgres, db migrations to accommodate these models in Postgres, and a EventTransformerInitializer to export the
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configured transformer and load it as a plugin to the `compose` or `composeAndExecute` commands as described in the [main readme](https://github.com/vulcanize/maker-vulcanizedb/blob/staging/README.md#composeandexecute-configuration).
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configured transformer and load it as a plugin to the `compose` or `composeAndExecute` commands as described in the main readme.
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The CSV file is expected to have 5 columns: contract address, block hash, block number, storage key, storage value.
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We have [a branch on vulcanize/parity-ethereum](https://github.com/vulcanize/parity-ethereum/tree/watch-storage-diffs) that enables running a node that writes storage diffs this way.
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We also have [sample data](https://github.com/8thlight/maker-vulcanizedb/pull/132/files) that comes from running that node against Kovan through block 9796184.
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Looking forward, we would like to isolate this assumption as much as possible.
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We may end up needing to read CSV data that is formatted differently, or reading data from a non-CSV source, and we do not want resulting changes to cascade throughout the codebase.
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{
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"name": "vulcanizedb",
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"version": "1.0.0",
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"description": "[![Join the chat at https://gitter.im/vulcanizeio/VulcanizeDB](https://badges.gitter.im/vulcanizeio/VulcanizeDB.svg)](https://gitter.im/vulcanizeio/VulcanizeDB?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)",
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"description": "",
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"scripts": {
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"build": "rm -rf ./build/dist && webpack --config=./webpack.config.js",
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"lint": "tslint --project ./tsconfig.json --config ./tslint.json",
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// NOTE (jchristie@8thlight.com) This file helps Jasmine
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// NOTE: This file helps Jasmine
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// comprehend TS sourcemaps by installing a reporter
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// specifically for TypeScript
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const TSConsoleReporter = require('jasmine-ts-console-reporter');
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import { Server } from 'http';
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import { PluginHookFn } from 'postgraphile/build/postgraphile/pluginHook';
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// NOTE (jchristie@8thlight.com) Shape of the middleware is not
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// NOTE: Shape of the middleware is not
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// currently important to this application, but if a need arises,
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// any needed shape can be assigned from a custom type here. For
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// the time being, this is a named stub to provide clarity.
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@ -14,7 +14,7 @@ export interface PostgraphileOptions {
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watchPg: boolean;
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enableCors: boolean;
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graphiql: boolean;
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// NOTE (jchristie@8thlight.com) Shape of the middlewares is not
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// NOTE: Shape of the middlewares is not
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// currently important to this application, but if a need arises,
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// any needed shape can be assigned from a custom type here.
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webSocketMiddlewares: object[];
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