Cardano Wallet Backend - Logging & SQLite (hotfix)

Overview

Program	Platform	Description
cardano-wallet	linux-x86_64	A CLI tool to start and interact with a wallet server. See Key Features below.
cardano-wallet.sh	linux-x86_64	Auto-completion script for cardano-wallet

This release is a hotfix for v2019-06-24 which had a flaw regarding the wallet restoration: restoration workers wouldn't be restarted with restarts of the wallet server.

Main Features

See v2019-06-24

Bug Fixes

Ticket	Title
#484	Restoration workers aren't restarted with the server

Known Issues

Ticket	Title
#409	cardano-wallet server fails with an unfriendly error when it does not connect to http-bridge within a few seconds
#423	Starting mainnet server on testnet bridge results in unfriendly error message.

Installation Instruction

See v2019-06-24

Documentation

See v2019-06-24

Changelog

Bugs Sprint 25-26

PR	Description
#458	Scenarios for 0 amount tx for multi and single output for CLI and API
#486	re-start restoration workers when restarting the application,

Jörmungandr Integration

PR	Description
#463	Implement Jörmungandr NetworkLayer postTx
#464	fix Jörmungandr witness calculation
#470	Turn on integration tests for Jörmungandr (Part I: Addresses & Wallets scenarios),
#471	Make faucet with 10 available UTxO for Jörmungandr,
#473	Get initial fee policy from the network (Jörmungandr),
#475	Turn on integration tests for Jörmungandr (Part II: Transactions scenarios),
#480	Move generic CLI functionality into cardano-wallet-cli library.,
#483	Integrate Jörmungandr backend with CLI.,
#487	Stricter jörmungandr binary encoders regarding integer overflow,

Logging

PR	Description
#492	Sqlite: Use the structured logging approach,
#485	Review logging in API layer,
#449	tests: Add a small test of Sqlite logging

Miscellaneous / Technical Debts

PR	Description
#489	Test invalid cli args and params,
#482	Provide ToText and FromText instances for Hash \Genesis\,
#479	Add development flag for cardano-wallet target.,
#478	Add ToText/FromText instances for String.,
#477	Use arbitraryBoundedEnum instead of genericArbitrary where possible.,
#468	Add missing roundtrip ToText/FromText tests for Cardano.Wallet.Primitive data types.,
#459	update 'listWallets' status in API specifications,
#457	Fixed wrong timeout in test expectations + update API specification with latest feature availability,
#456	bump revision for iohk-monitoring-framework,
#455	bump version to 2019.6.24, preparing next release,
#454	Integration Test Scenarios on top of Jörmungandr (Initial Setup),
#453	another attempt trying to cope with 500 when fetching network tip shortly after init (bridge),
#452	Review transaction ids golden tests (only new addresses),
#451	Parameterize Tx data-type over the wallet core engine (allowing to work with different representations),
#450	Replace CLI --min-log-severity argument with --quiet and --verbose switches.

Full Changelog

Signatures

Name	Role	Approval
Matthias Benkort @KtorZ	Technical Team Lead	✔️
Piotr Stachyra @piotr-iohk	QA Engineer	✔️
Tatyana Valkevych @tatyanavych	Release Manager	✔️

Cardano Wallet Backend - Logging & SQLite

Overview

Program	Platform	Description
cardano-wallet	linux-x86_64	A CLI tool to start and interact with a wallet server. See Key Features below.
cardano-wallet.sh	linux-x86_64	Auto-completion script for cardano-wallet

This release tries to close the gap for allowing Daedalus to start integrating with the wallet backend. It also comes bundled with an SQLite persistence layer to allow saving to disk the wallet state. On the way to testnet and mainnet releases, we have also introduced better structured logging in this release, with some degrees of control regarding the verbosity of the software.

We have simplified a bit the software organization and merged together cardano-wallet and cardano-wallet-launcher in a single binary cardano-wallet. The launcher is now available as a launch command.

⚠️ This release contains a critical issue regarding wallet restoration (see #484).

This issue is fixed in v2019-07-02.

Main Features

cardano-wallet

• A command-line interface which exposes the following features (see CLI manual below):

  • Create and Delete wallet
  • Get details of a particular wallet
  • List all known wallets
  • Generate BIP-39 mnemonic sentence (english) of various sizes
  • Update wallet metadata
  • Create and submit transactions from a single wallet
  • List known (used or unused) addresses of a wallet
  • ![][new] --state option for cardano-wallet address list
  • ![][new] serve command (replaces server ⚠️ breaking-change ⚠️)
  • ![][new] launch command (replaces cardano-wallet-launcher ⚠️ breaking-change ⚠️)
  • ![][new] --state-dir option for cardano-wallet launch
  • ![][new] --database option for cardano-wallet serve
  • ![][new] --random-port option for cardano-wallet launch and cardano-wallet serve
  • ![][new] --quiet and --verbose options for cardano-wallet launch and cardano-wallet serve

• A web server which exposes the following features (see API Documentation below):

  • Create and Delete wallet
  • Get details of a particular wallet
  • List all known wallets
  • Update wallet metadata & wallet encryption passphrase
  • Create and submit transactions from a single wallet
  • List known (used or unused) addresses of a wallet
  • ![][new] Filter addresses by state (used or unused)
  • ![][new] SQLite backend to persist the wallet state to disk!
  • ![][new] API request / response logging
  • ![][new] Database debug logs
  • ![][new] (Partial) application-level logs

• ![][new] Node.js-compatible IPC server with custom protocol

Known Limitations

• ⚠️ Only one address derivation scheme is supported: sequential scheme (a.k.a. Icarus' address style or, addresses à la BIP-44).

• ⚠️ So far, only one backend is supported: cardano-http-bridge (run on the Byron-OFT era, experimental stability).

Bug Fixes

Ticket	Title
#250	GET v2/wallets does not list wallets from oldest to newest
#260	No additional error message in case of 4xx responses
#324	Bech32 occassionally fails when decoding a string with an omitted character
#326	Cannot post transaction after updating wallet's passphrase
#333	Sending transaction to not-valid address (yet being base58 encoded string) gives HTTP 500 -> "Something went wrong"
#364	Transaction with amount 0 on http bridge fails with error HTTP 500
#397	CLI wrongly returns exit code 0 when providing not existing wallet id
#398	CLI unnecessarily asks for password when posting transaction from a non-existing wallet
#403	API swagger specification isn't a valid swagger file

Known Issues

Ticket	Title
#409	cardano-wallet server fails with unpleasant error when does not connect to http-bridge within a few seconds
#423	Starting mainnet server on testnet bridge results in unfriendly error message.
#484	Restoration workers aren't restarted with the server

Installation Instruction

Please note that currently only Unix\Linux platform is supported.

1. Install cardano-http-bridge from our fork.

   • Install the rust toolchain.
   • In terminal run cargo install --git https://github.com/KtorZ/cardano-http-bridge.git --branch cardano-wallet-integration
   • make sure $HOME/.cargo/bin is on your $PATH

2. Download cardano-wallet and put it in the directory that is on your $PATH, e.g. /usr/local/bin. Make sure to add exec permissions on binary files:

   • chmod u+x cardano-wallet

3. Start cardano-wallet --help and see available parameters.

Documentation

Link	Audience
API Documentation	Users of the Cardano Wallet API
Haddock Documentation	Haskell Developers using the cardano-wallet as a library
CLI Manual	Users of the Cardano Wallet API

Changelog

SQLite implementation for the DB Layer

PR	Description
#259	Generate DBLayer tests with quickcheck-state-machine
#337	Sqlite: add more locking to DBLayer methods
#341	Sqlite: Initial benchmark for putTxHistory
#347	Sqlite: use repsertMany instead of deleteMany+putMany
#348	Sqlite benchmark: Use a file-based DB
#349	Some small fixes to DB.StateMachine module.
#360	Sqlite: Fix deletion for larger numbers of checkpoints/transactions
#367	Make DB QSM tests fail if one or more tags are not covered.
#370	Recreate passing tests and file-based and in-memory runQuery
#377	cli: Add "local" network to launcher, and --state-dir for the database
#378	Clean ups of Sqlite test code
#379	Use SQLite in restoration benchmark (instead of MVar implementation)
#406	Use SQLite in integration tests scenarios (instead of MVar)
#413	Additional tests checking if files exists when using --database and --state-dir options

Jörmungandr Integration

PR	Description
#310	Add Jörmungandr Servant Api Type
#313	Address Format in Shelley Era (Part 1: abstract over the address encoding)
#321	Jormungandr m with getTipId implementation
#322	Simplify folder structure, e.g. s/Binary.HttpBridge/HttpBridge.Binary/
#323	Miscellaneous Bech32 library fixes and improvements.
#325	Add Cardano.Wallet.Jormungandr.Network.Api
#327	Add extra debugging information to Bech32 decoding corruption tests.
#328	Add known-to-fail counterexamples to Bech32 string corruption tests.
#329	move Cardano.Environment.{HttpBridge,Jormungandr} to Cardano.Wallet.{HttpBridge,Jormungandr}.Environment
#332	Fix the Bech32 character mutation test.
#336	Address Format in Shelley (Part 2: implementing address encoder and decoders + tests)
#338	Fix index limits in Bech32 mutation tests
#340	Strengthen the precondition for the Bech32 mixed-case mutation test.
#362	Add initial support for serializing signed transaction
#369	Implement Jörmungandr getBlock and getDescendants
#382	review & fix jormungandr configuration to enable block production in BFT mode
#383	Jörmungandr: mkNetworkLayer with networkTip
#384	Change wallet currentTip from SlotId to BlockHeader
#385	Add labels to binary decoders for improved debugging
#394	Handle getBlockHeader special cases for proofs
#396	Relocate reusable integration tests components to core
#400	Preliminary integration tests between Jormungandr <-> Network Layer (networkTip)
#405	Implement NetworkLayer getNext for Jörmungandr
#417	Jörmungandr: Separate concern between keyToAddress and get/putAddress
#424	Cr...

Cardano Wallet Backend - Transaction Support

Overview

Program	Platform	Description
cardano-wallet	linux-x86_64	A CLI tool to start and interact with a wallet server. See Key Features below.
cardano-wallet.sh	linux-x86_64	Auto-completion script for cardano-wallet
cardano-wallet-launcher	linux-x86_64	A commodity utility to launch a wallet server with a corresponding node backend.

This release brings full transaction support (on Byron network) to the API and the command-line. It also contains a few minor bug fixes and documentation improvements (as well as much more descriptive and user-friendly errors from the API and the command-line).

Key Features

cardano-wallet

• A command-line interface which exposes the following features (see CLI manual below):

  • Create and Delete wallet
  • Get details of a particular wallet
  • List all known wallets
  • Generate BIP-39 mnemonic sentence (english) of various sizes
  • ![][new] Update wallet metadata
  • ![][new] Create and submit transactions from a single wallet
  • ![][new] List known (used or unused) addresses of a wallet

• A web server which exposes the following features (see API Documentation below):

  • Create and Delete wallet
  • Get details of a particular wallet
  • List all known wallets
  • ![][new] Update wallet metadata & wallet encryption passphrase
  • ![][new] Create and submit transactions from a single wallet
  • ![][new] List known (used or unused) addresses of a wallet

cardano-wallet-launcher

• A command-line interface which starts and supervise both a wallet server and a cardano-http-bridge

Known Limitations

• ⚠️ Only one address derivation scheme is supported: sequential scheme (a.k.a. Icarus' address style or, addresses à la BIP-44).

• ⚠️ So far, only one backend is supported: cardano-http-bridge (run on the Byron-OFT era, experimental stability).

• ⚠️ The wallet backend server is shipped with only an in memory storage which is volatile: restarting the server will erase the memory completely.

Bug Fixes

Ticket	Title
#291	Shuffle statistical tests sometimes fail...

Known Issues

Ticket	Title
#250	GET v2/wallets does not list wallets from oldest to newest
#260	No additional error message in case of 4xx responses
#324	Bech32 occassionally fails when decoding a string with an omitted character
#326	Cannot post transaction after updating wallet's passphrase
#333	Sending transaction to not-valid address (yet being base58 encoded string) gives HTTP 500 -> "Something went wrong"
#364	Transaction with amount 0 on http bridge fails with error HTTP 500
#397	CLI wrongly returns exit code 0 when providing not existing wallet id
#398	CLI unnecessarily asks for password when posting transaction from a non-existing wallet
#403	API swagger specification isn't a valid swagger file

Installation Instruction

Please note that currently only Unix\Linux platform is supported.

1. Install cardano-http-bridge.

   • Install the rust toolchain.
   • In terminal run cargo install --git https://github.com/input-output-hk/cardano-http-bridge.git
   • make sure $HOME/.cargo/bin is on your $PATH

2. Download cardano-wallet and cardano-wallet-launcher and put it in the directory that is on your $PATH, e.g. /usr/local/bin. Make sure to add exec permissions on binary files:

   • chmod u+x cardano-wallet cardano-wallet-launcher

3. Start cardano-wallet-launcher --help and see available parameters and follow instructions about how to install cardano-http-bridge if you haven't done already in point 1.

⚠️ The wallet server & launcher both expect a NETWORK ENV var to be available with one of the following value:

• mainnet
• testnet
• staging (not supported)

This variable commands which network the software should connect to and interact with.

Documentation

Link	Audience
API Documentation	Users of the Cardano Wallet API
Haddock Documentation	Haskell Developers using the cardano-wallet as a library
CLI Manual	Users of the Cardano Wallet API

Changelog

SQLite implementation for the DB Layer

PR	Description
#246	Tidy up some of the formatting within Cardano.Wallet.DB.Sqlite.
#247	Set up database connection and create tables
#270	Relocate properties to DBSpec for further sharing
#272	Add functions for serializing keys as text
#276	Sqlite: add a test of cascading delete
#282	SQLite: Add put/readPrivateKey to DBLayer
#283	Sqlite: add checkpoints and transactions to DBLayer
#288	Sqlite: implement withLock from DBLayer
#293	Add indexes to certain SQLite table columns
#300	Sqlite: enable db property tests and fix failures

Jörmungandr High-Level Integration

PR	Description
#244	Scaffold lib/jormungandr folder
#319	Include more examples from BIP-173 vectors in tests
#245	Jörmungandr block format header decoding
#248	Bech32 Library - port of reference implementation
#266	Add 'Initial' message-decoder with config parameters
#271	Use richer errors for Bech32 encoder and decoder
#273	Implement Jörmungandr Transaction-message decoder
#275	Docs, polish and config param 16
#277	Further enhancements to the Bech32 library.
#284	Build Jörmungandr on CI - another take
#287	Make CI faster especially on PR builds
#290	Remove redundant job condition in travis (already at top-level)
#296	Improve bech32 coveralls
#297	Add Jörmungandr integration tests
#305	Add genesis.yaml and instructions for how to use it
#309	Change jormungandr rest port to 8081
#312	Fix Bech32 decoder + encoder

Transaction Support

PR	Description
#258	Enable transaction support in integration tests for cardano-http-bridge
#263	Integration test: Polling for wallet fixture & Better error handling
#269	Fix references to 'ApiTransaction' in swagger specification
#274	Implement ability to list addresses in the wallet layer, API and CLI
#281	First end-to-end transaction Integration test (with http-bridge)
#301	Transaction integration tests
#317	Review Fee Window for Tx scenarios

Miscellaneous / Technical Debts

PR	Description
#241	Use more natural English in the CLI usage string.
#243	Start reviewing Primitive.Types docs
#249	Wallet Management Remaining Endpoints: update & update passphrase
#251	WALLETS_GET,LIST,DELETE integration tests
#252	update 4xx responses in API spec
#253	Add CLI manual to README
#254	Parse name and wallet-id as argument
#255	Fix warning about license-file of lib/cli/cardano-wallet-cli.cabal
#257	Wallet update integration tests
#261	Wallet update passphrase integration tests
#262	Add bors.toml
#264	Basic integration scenarios for CLI
#267	Fix inconsitent response code wallet update
#278	More integration tests for CLI (including minor fixes in CLI)
#279	Take into account out-of-process executions for code coverage
#285	Fix bors config
#289	show feature availability in API specification
#303	Release deployments tweaks + template

Bugs - Sprint 19/20

PR	Description
#292	Fix Change Calculation
#295	fix shuffle tests in CoinSelectionSpec once and for all
#298	More Descriptive Errors (Part 1/2)
#299	More Descriptive Errors (Part 2/2)
#304	Remove temporary code from CLI for ...

Cardano Wallet Backend - Wallet Management

Overview

Program	Platform	Description
cardano-wallet	linux-x86_64	A CLI tool to start and interact with a wallet server. See Key Features below.
cardano-wallet-launcher	linux-x86_64	A commodity utility to launch a wallet server with a corresponding node backend.

Key Features

This release contains support for basic wallet management features via web
server (JSON through HTTP) or a command-line interface.

cardano-wallet

• A command-line interface which exposes the following features (see CLI manual below):

  • ![][new] Create and Delete wallet
  • ![][new] Get details of a particular wallet
  • ![][new] List all known wallets
  • ![][new] generate mnemonic sentence (english) of various sizes

• A web server which exposes the following features (see API Documentation below):

  • ![][new] Create and Delete wallet
  • ![][new] Get details of a particular wallet
  • ![][new] List all known wallets

cardano-wallet-launcher

• A command-line interface which starts and supervise both a wallet server and a cardano-http-bridge

Known Limitations

• ⚠️ Only one address derivation scheme is supported: sequential scheme (a.k.a. Icarus' address style or, addresses à la BIP-44).

• ⚠️ So far, only one backend is supported: cardano-http-bridge (run on the Byron-OFT era, experimental stability).

• ⚠️ The wallet backend server is shipped with only an in memory storage which is volatile: restarting the server will erase the memory completely.

Known Issues

Ticket	Title
#250	GET v2/wallets does not list wallets from oldest to newest
#291	Shuffle statistical tests sometimes fail...

Bug Fixes

• N/A

Installation Instruction

Please note that currently only Unix\Linux platform is supported.

1. Install cardano-http-bridge.

   • Install the rust toolchain.
   • In terminal run cargo install --git https://github.com/input-output-hk/cardano-http-bridge.git
   • make sure $HOME/.cargo/bin is on your $PATH

2. Download cardano-wallet and cardano-wallet-launcher and put it in the directory that is on your $PATH, e.g. /usr/local/bin. Make sure to add exec permissions on binary files:

   • chmod u+x cardano-wallet cardano-wallet-launcher

3. Start cardano-wallet-launcher --help and see available parameters and follow instructions about how to install cardano-http-bridge if you haven't done already in point 1.

NOTE:

The wallet server & launcher both expect a NETWORK ENV var to be available with one of the following value:

• mainnet
• testnet
• staging (not supported)

This variable commands which network the software should connect to and interact with.

Documentation

Link	Audience
API Documentation	Users of the Cardano Wallet API
Haddock Documentation	Haskell Developers using the cardano-wallet as a library
CLI Manual	Users of the Cardano Wallet API

Changelog

Wallet Layer Integration (with cardano-http-bridge)

PR	Description
#88	Add property tests for the database layer
#97	Fix typo in http-bridge tests
#98	Increase test coverage for http-bridge integration
#115	Technical debt: add unit tests for network and wallet layer
#132	Http-bridge with a local cluster in integration tests
#134	Move test data archives
#135	Get cardano-node-simple available in CI & allow manipulating stream output when launching commands
#149	Prevent network layer to "die" when node backend fails
#153	Better test coverage for 'Network.listen'
#179	Runtime network configuration as ENV var
#193	Provide clearer failure reason when wallet is not syncing
#202	Redirect launcher, wallet & bridge output to temporary files during integration tests
#205	Review high-level interfaces ('IsOurs', 'IsOwned', 'GenChange') to be more granular
#207	Parameterize wallet core over the 'TxId' format
#210	Parameterize wallet core over the 'Address' format
#212	Code re-organization: Extract Http-bridge specifics into a dedicated package
#226	Make integration tests failing with a clear message on mainnet and staging

Restore Historical Data

PR	Description
#137	Add tracking of known transactions to the wallet model
#150	Store transaction history outside of the wallet state
#156	Wallet Id deterministic calculation from root public key
#158	Extend DB layer & wallet to support wallet metadata
#172	Unify 'watchWallet', 'listen', 'processWallet', 'tick' etc.. into one 'restoreWallet'
#180	Implement some missing API handlers for the wallets endpoints
#234	Fix 'slotRatio' case where the numerator is further than the denominator

Benchmarking & Nightly Builds

PR	Description
#120	Remove unused semigroup instance for address pools
#157	Add restore benchmarks
#160	Add new "special" address discovery scheme (proportional ownership) for testing and benchmarking
#169	Fix benchmarks on Buildkite after last refactor
#187	Add buildkite nightly build badge (and link) to README
#190	Move ENV var export from buildkite script to buildkite pipeline settings

Coin Selection, transaction creation & submission

PR	Description
[#114](https://github.com/input-output-hk/cardano-wallet...

Cardano Wallet Backend - Foundations

Overview

This initial release of Cardano Wallet Backend includes two binaries:

• cardano-wallet-server
• cardano-wallet-launcher

The cardano-wallet-server in future will serve API and CLI interfaces for the
wallet backend. In this release it is just a stub.

The cardano-wallet-launcher is responsible for starting (and terminating when
closed) the cardano-wallet-server and cardano-http-bridge which is an interface
that Cardano Wallet Backend uses to interact with the blockchain. The
cardano-http-bridge is therefore a prerequisite that needs to be installed
before running the cardano-wallet-launcher.

Key Features

• N/A

Bug Fixes

• N/A

Installation Instruction

Please note that currently only Unix\Linux platform is supported.

1. Install cardano-http-bridge.

   • Install the rust toolchain.
   • In terminal run cargo install --git https://github.com/input-output-hk/cardano-http-bridge.git
   • make sure $HOME/.cargo/bin is on your $PATH

2. Download cardano-wallet-server and cardano-wallet-launcher and put it in
   the directory that is on your $PATH, e.g. /usr/local/bin. Make sure to
   add exec permissions on binary files:

   • chmod u+x cardano-wallet-server cardano-wallet-launcher

3. Start cardano-wallet-launcher --help and see available parameters and
   follow instructions about how to install cardano-http-bridge if you
   haven't done already in point 1.

Documentation

Link	Audience
API Documentation	Users of the Cardano Wallet API
Haddock Documentation	Haskell Developers using the cardano-wallet as a library

Changelog

Setup new cardano-wallet repository & CI

PR	Description
#9	Stylish, hlint
#10	Version specification documents (api & formal specs)
#13	Add .gitignore
#15	Initial stack project and Travis CI
#17	Add .editorconfig
#18	Rename README to README.md (in specifications/api)
#19	Add Coveralls & Stylish Haskell to CI
#24	Re-introduce 'Acceptance Criteria' as part of the issue template
#31	Review .travis.yaml to allow multiple jobs & haddock export
#45	Fix 406 to be correct 410 error code in API specification
#65	Add build instructions for the http bridge in CI
#66	Update Wallet API specification draft document
#70	Add cardano-http-bridge to environment of stack --nix
#85	Review deploy pipeline for Travis for executables
#86	Add mising target to stack haskell coverage reports

Receive & Process Blocks (from cardano-http-bridge)

PR	Description
#28	Add block decoder
#32	Pack file decoder
#35	Adding ticking functionality for block polling
#37	Review folder structure, file documentation and pragmas
#40	Add a basic API client for the Rust Cardano HTTP Bridge
#41	Add nextBlocks function
#44	Review BlockSyncer Tests: Separate IO from pure code
#48	tests: Add a couple negative tests for block decoding
#49	Apply miscellaneous coding style fixes
#50	Tweak Blocks Generator + Moar Tests + Better Coverage
#54	Add startBlockSyncer
#57	Review style of ChainProducer modules + add license header
#60	Review Network Layer
#66	Merge BlockSyncer with NetworkLayer
#71	Allow BlockSyncer.listen to catch up with the node
#80	Integration Tests Http Bridge

Basic Launcher

PR	Description
#27	Docopt for CLI parsing
#38	Launch http bridge and wallet together
#75	launcher: When terminated, ensure child processes are cleaned up
#77	Add manual steps describing how to check launcher behavior regarding POSIX signals
#78	Make it possible to connect wallet to staging
#84	remove temporary dummy wallet server to avoid confusion
#87	QA review of #8

Support Wallet Creation

PR	Description
#25	Wallet Primitive Types
#29	Add additional wallet primitives and wallet layer primitives
#34	Compute TxId
#42	Implement txId hash using CBOR encoders
#43	Minimal Viable Wallet Layer
#46	Address Derivation (Sequential)
#47	Port Mnemonic Module
#51	Address Discovery (Sequential)
#58	Few more unit tests for mnemonics + adjusting wallet API spec
#59	Review Slotting as Primitive
#61	Add an extra bit of documentation to the 'AddressDerivation' module
#82	Add createWallet and getWallet tests

Wallet Layer Integration (with cardano-http-bridge)

PR	Description
#62	Add very preliminary interface/structure for wallet getter and creation
#64	Draft an initial interface for a DB Layer
#73	Connect Primitives to Layers
#81	Replace usage of 'mtl' with 'transformers'