District UI Module for Mobile Browser Integration

district-ui-mobile

Clojurescript re-mount module, that provides mobile integration.

Installation

Add [district0x/district-ui-mobile "1.0.0"] into your project.clj

Quickstart

district.ui.mobile first needs to be initialized, as defined in the re-mount pattern.

Include district.ui.mobile within the main file where you call mount/start

;; core.cljs, or main.cljs, etc...
(require '[mount.core :as mount])
(require '[district.ui.mobile])

;; optional initialization options
(def district-ui-options
  {:mobile {:force-mobile-device false}})

(mount/start (with-args district-ui-options))

Subscriptions can then be made to determine if the web application is being viewed from mobile devices, specifically Android or iOS devices.

;; re-frame view file
(require '[re-frame :refer [subscribe]])
(require '[district.ui.mobile.subs :as mobile-subs])

(defn show-device []
  (let [android? (subscribe [::mobile-subs/android?])
        ios? (subscribe [::mobile-subs/ios?])]
    (fn []
     [:div
      (cond
       @android? [:span "You are on an Android device."]
       @ios? [:span "You are on an iOS (iPhone, iPad) device."]
       :else [:span "We don't know if you're on a mobile device."])])))

Another use-case is determining if the device is coinbase-compatible.

;; re-frame view file
(require '[re-frame :refer [subscribe]])
(require '[district.ui.mobile.subs :as mobile-subs])

(defn coinbase-dialog []
  (let [coinbase-compatible? (subscribe [::mobile-subs/coinbase-compatible?])]
    (fn []
     [:div
      (if @coinbase-compatible?
        [:span "Mobile device is coinbase compatible."]
        [:span "Device is not coinbase compatible."])])))

API Overview

• district.ui.mobile
• district.ui.mobile.subs
  • ::android?
  • ::ios?
  • ::coinbase-compatible?

district.ui.mobile

This namespace contains the mobile mount module.

You can pass the following args while initiating this module:

• :force-mobile-device Used to imitate a mobile browser. Accepts one of the values: true (android), :android, :ios, or false. By default, this value is set to false.

For example, if I wanted to imitate an iOS device:

(ns my-district.core
 (:require [mount.core :as mount]
           [district.ui.mobile]
           ;;...
           ))

(-> (mount/with-args
     {:mobile {:force-mobile-device :ios}
      ;; Additional mount options...
      })
    (mount/start))

district.ui.mobile.subs

re-frame subscriptions provided by this module:

::android? []

Returns true if an Android mobile device is viewing the web application, otherwise false

::ios? []

Returns true if an iOS mobile device (iPhone, iPad) is viewing the web application, otherwise false.

::coinbase-compatible? []

Returns true if an coinbase-compatible mobile device is viewing the web application, otherwise false.

Development

Testing

$ lein doo

Download Details:
Author: district0x
Source Code: https://github.com/district0x/district-ui-mobile
License: EPL-1.0 License

#blockchain   #cryptocurrency   #district0x   #web3   #clojure 

District UI for Web3 Sync

district-ui-web3-sync-now

Clojurescript re-mount module, that synchronises UI time with the blockchain time.

Installation

Add [district0x/district-ui-web3-sync-now "1.0.3-2"] into your project.clj. Include [district.ui.web3-sync-now] in your CLJS file, where you use mount/start.

API Overview

Warning: district0x modules are still in early stages, therefore API can change in a future.

district.ui.web3-sync-now

This namespace contains now mount module. This module has no configuration parameters.

(ns my-district.core
  (:require [mount.core :as mount]
            [district.ui.now]
            [district.ui.web3]
            [district.ui.web3-sync-now]
            [district.ui.logging]))

(-> (mount/with-args {:logging {:level :info}
                      :web3 {:url "http://127.0.0.1:8549"}})
    (mount/start))

After the :start lifecycle method gets called this module waits for the :district.ui.web3.events/web3-created event and sets :district.ui.now.subs/now time to the last block time on the blockchain. Set the logging level to get notified of errors and/or successfull events.

district.ui.web3-sync-now.events

re-frame events provided by this module:

::increment-now

Event to increment now time in a re-frame db and the (testrpc) blockchain time by a number of seconds.

(ns my-district.core
  (:require [district.ui.web3-sync-now.events :as sync-now-events]
            [re-frame.core :as re-frame]))

(re-frame/dispatch [::sync-now-events/increment-now 300])

Errors and successfully handled events will be logged to the JS console.

::block-number

This is an utility event called by the :start lifecycle method of the module. It wraps the re-frame-web3-fx web3/call effect and chains the returned last block number to the ::get-block event. In a typical application you will never need to call this event yourself.

::get-block

This is an utility event which wraps the re-frame-web3-fx web3/call effect and chains the returned last block object to the ::set-now. In a typical application you will never need to call this event yourself.

::set-now

This is an utility event which sets the :district.ui.now.subs/now time from the last block time. Upon success it will log to the JS console. In a typical application you will never need to call this event yourself.

Development

Run test suite:

lein deps
# To run tests and rerun on changes
lein doo chrome tests

Install into local repo:

lein install

Download Details:
Author: district0x
Source Code: https://github.com/district0x/district-ui-web3-sync-now
License: EPL-1.0 License

#blockchain   #cryptocurrency   #district0x   #web3   #clojure 

District UI Component for Calendar Reminders

district-ui-component-add-to-calendar

Clojurescript mount + re-frame component for a district UI, that provides reagent UI component for adding calendar reminders. Works with Google Calendar and Apple Calendar.

Installation

Add [district0x/district-ui-add-to-calendar "1.0.0"] into your project.clj.
Include [district.ui.component.add-to-calendar] in your CLJS file.

Usage

district.ui.component.add-to-calendar

This namespace contains reagent UI component.

Basic usage example:

(ns my-district
  (:require [cljs-time.core :as t]
            [reagent.core :as r]
            [district.ui.component.add-to-calendar :as add-to-calendar]))

(defn main-panel []
  [:div#page1 [add-to-calendar/add-to-calendar {:title "Test"
                                                :url "https://district0x.io"
                                                :description "description"
                                                :start-time (t/now)
                                                :end-time (t/now)}]])

(defn ^:export init []
  (r/render [main-panel] (.getElementById js/document "app")))

Download Details:
Author: district0x
Source Code: https://github.com/district0x/district-ui-component-add-to-calendar
License:

#blockchain   #cryptocurrency   #district0x  #web3   #clojure 

District0x Tasks: Voting Dapp to Assign Project Work To Contractors

district0x-tasks

Development

First time run

lein deps

Compile contracts (assumes you have solc installed):

lein solc

Auto compile contracts on changes:

lein solc auto

Start server:

ganache-cli -d -p 8545 -m district0x
lein repl
(start-server!)
node dev-server/district0x-tasks.js

Start UI:

lein garden once
lein repl
(start-ui!)
# go to http://localhost:4598/

How to do tests:

ganache-cli -d -p 8545 -m district0x
lein test-doo

If change contracts code:

; auto compile Solidity code in project when files changed
lein solc auto

Remember this doesn't trigger cljs tests. So you have to change cljs tests files to trigger. For example add new line.

QA env and Dockerfiles

See docker-compose file in https://github.com/district0x/pipelines

Download Details:
Author: district0x
Source Code: https://github.com/district0x/district0x-tasks
License: EPL-1.0 License

#blockchain   #cryptocurrency  #district0x   #web3   #clojure 

Leiningen Plugin for Compiling Solidity Smart Contracts

lein-solc

A Leiningen plugin for compiling Solidity smart contracts.

Installation

lein-solc is available from Clojars. The latest released version is: Here 
Add it to the :plugins vector of your project.clj.

Plugin assumes solc compiler is installed and on your $PATH.

Usage

You can specify the contracts to compile by adding an :solc map to your project.clj. It takes the following key value pairs:

• :src-path string with the path where the .sol source files are residing, relative to the projects root path.
• :build-path string with the path where the compiled output is written to, relative to the projects root directory.
• :abi? (optional) boolean, if true (default) output includes contract's abi interfaces.
• :bin? (optional) boolean, if true (default) output includes contract's bytecode.
• :truffle-artifacts? (optional) boolean, if true contracts are compiled into truffle artifacts, that can be required and deployed with truffle.
• :contracts vector of files with the Solidity contracts source code, relative to the src-path directory (you can also specify sub-directories), or :all to compile all of the contracts in the root of the src-path.
• :solc-err-only (optional) boolean, if true (default value) only compilation errors will be reported to the STDOUT.
• :verbose (optional) boolean, if false (default value) the STDOUT output is limited to the most important information.
• :byte-count boolean, if true after succesfull compilation the number of bytes in the compiled .bin file will be printed to the STDOUT. Only valid if :bin? is set to true.
• :optimize-runs (optional) map of contract filenames and parameter n values, where 0 <= n < inf is an estimated number of contract runs for optimizer tuning. It represents a trade-off between a smaller bytecode (low values) and cheaper transaction costs (high values).

Example:

:solc {:src-path "resources/contracts/src"
       :build-path "resources/contracts/build/"
       :contracts ["MyContract.sol" "sub/MySecondContract.sol"]
       :byte-count true
       :optimize-runs {"MyContract.sol" 1}}

The contracts in :contracts will be compiled when you do:

$ lein solc once

which is equivalent to lein solc. You can also watch the :contracts files and re-compile them on changes if you do:

$ lein solc auto

Download Details:
Author: district0x
Source Code: https://github.com/district0x/lein-solc
License: 

#blockchain   #cryptocurrency   #district0x   #web3   #clojure #smartcontract 

MemeFactory Smart Contracts EVM Package

Meme Factory EVM Package

This repository contains MemeFactory smart contracts packaged as a reusable EVM Package. You can deploy them as-is, or extend to suit your needs to build custom contracts and more complex decentralized systems.

Install

npm install memefactory-contracts

Packaged contracts

• DSAuth
• DSGuard
• EternalDb
• Registry
• MiniMeTokenFactory
• DankToken
• MemeToken
• MemeFactory

Development

prerequisites

You need ZeppelinOS comand-line interface installed:

npm install --global zos

Using this package

Create a new ZeppelinOS project, and add the memefactory-contracts EVM package:

zos init MyProject
zos link memefactory-contracts

Start session with a network called local (defined in truffle-config), using an address different from the default:

zos session --network local --from <address> --expires 3600

Deploy all the added logic contracts to the network (note that this step is only needed on local networks, when working on public networks ZeppelinOS will automatically used the pre-deployed implementation contracts):

zos push --deploy-dependencies

Developing and contributing to this package

Initialize project:

zos init memefactory-contracts

Add contracts:

zos add DSAuth:ds-auth
zos add DSGuard:ds-guard
zos add EternalDb:meme-registry-db
zos add Registry:meme-registry
zos add App:token-factory
zos add DankToken:DANK
zos add MemeToken:meme-token
zos add MemeFactory:meme-factory

Start session with a testrpc network called ganache (defined in truffle-config):

zos session --network ganache --from <address> --expires 3600

Deploy all the added logic contracts to the network:

zos push --force

Publish the contracts:

zos publish --network ganache --from <address>

Updating packaged contracts

Update to a new version of the package and deploy changes to the logic contracts:

zos link memefactory-contracts@new-version
zos push --deploy-dependencies

Deploy updated instances of the contracts to interact with:

zos update meme-factory

Deploy upgradeable instances of the contracts:

OWNER=<address>
DB=$(zos create meme-registry-db --init initialize)
REGISTRY=$(zos create meme-registry --init --args $DB,$OWNER)
TOKEN_FACTORY=$(zos create token-factory)
DANK_TOKEN=$(zos create DANK --init --args $TOKEN_FACTORY,1000000000000000000000000000,$OWNER)
MEME_TOKEN=$(zos create meme-token --init --args $REGISTRY)
MEME_FACTORY=$(zos create meme-factory --init --args $REGISTRY,$DANK_TOKEN,$MEME_TOKEN,1)

Interact with the contracts

NOTE

When interacting with deployed contracts use a different address than that of the owner (admin) addressed used when creating it. The transparent proxy pattern posits that the calls from the admin address will not be delegated to the proxy contract holding the logic.

npx truffle console --network ganache

var address='contract-instance-address';
memeFactory=MemeFactory.at(address)
var opts = {from: 'address'};
memeFactory.version(opts)

Download Details:
Author: district0x
Source Code: https://github.com/district0x/memefactory-contracts
License: https://github.com/district0x/memefactory-contracts

#blockchain #evm   #cryptocurrency   #district0x   #web3   #clojure #javascript #smartcontract 

A Set Of Useful Functions for Encryption Data on District Blockchain

district-encryption

Set of functions helpful for data encryption on blockchain based on public/private key. This library utilises eccjs. Suitable for both nodejs and browser.

Installation

Add: Here
 into your project.clj 

Include [district.encryption] in your CLJS file.

district.encryption

generate-keypair []

Generates and returns public/private keypair.

encrypt [public-key content]

Encrypts content with public key.

decrypt [private-key content]

Decrypts content with private key.

encode-base64 [string]

Base64 encodes string.

decode-base64 [string]

Base64 decodes string.

encrypt-encode [public-key content]

Encrypts with public key and then base64 encodes.

decode-decrypt [private-key content]

Base64 decodes and then decrypts with private key.

Download Details:
Author: district0x
Source Code: https://github.com/district0x/district-encryption
License: EPL-1.0 License

#blockchain   #cryptocurrency   #district0x   #web3   #clojure 

District0x Library with Functions for Error Handling

district0x-error-handling

Clojurescript library with functions aiding in error handling. This library currently utilises timbre as a logging library. You shoud use it in conjunction with the district-server-logging and district-ui-logging modules which setup various logging appenders.

Installation

Add into your project.clj: Here

Include [district.shared.error-handling] in your CLJS file. 

district.shared.error-handling

try-catch 

• Wraps around a function body and logs any exception being thrown.

try-catch-throw

• Wraps around a function body, logs any exception being thrown and then re-throws it for further handling.

Usage

(ns my-district
  (:require [district.shared.error-handling :refer [try-catch try-catch-throw]]))

(defn function-that-can-fail [n]
  (try-catch
   (/ 7 n)))

Library dependencies

district-server-logging

error-handling requires a configured district-server-logging and/or district-ui-logging modules to function correctly. Depending on where the code is run and how the logging is configured your errors will be reported to the browser, node.js console, log file, sentry etc. 

For possible configuration options please see district-server-logging and district-ui-logging.

Download Details:
Author: district0x
Source Code: https://github.com/district0x/district0x-error-handling
License: EPL-1.0 License

#blockchain   #cryptocurrency   #district0x   #web3   #clojure 

District UI Component for Displaying & Selecting Active Web3 Account

district-ui-component-active-account

Clojurescript reagent UI component for displaying user's active web3 account. If user has multiple accounts, select field will be presented, otherwise just plain element with the address. This component uses React Semantic UI.

Installation

Add [district0x/district-ui-component-active-account "1.0.0"] into your project.clj
Include [district.ui.component.active-account] in your CLJS file

Module dependencies

This UI component assumes you have following UI modules installed in your app:

• district-ui-web3-accounts

district.ui.component.active-account

You can pass following props to the active-account component:

• :select-props Props passed into Select with multiple accounts.
• :single-account-props Props passed into single account element

  (ns my-district.core
    (:require [district.ui.component.active-account :refer [active-account]]))
              
  (defn home-page []
      [active-account])

Download Details:
Author: district0x
Source Code: https://github.com/district0x/district-ui-component-active-account
License: EPL-1.0 License

#blockchain   #cryptocurrency   #district0x   #web3   #clojure 

District UI Component for Serving Meta-tags

district-ui-component-meta-tags

Clojurescript mount + re-frame component for a district UI, that provides reagent UI component for serving html meta-tags for SEO.

Installation

Add: Here 
into your project.clj.

Include [district.ui.component.meta-tags] in your CLJS file.

Usage

district.ui.component.meta-tags

This namespace contains reagent UI component to add meta tags.

Basic usage:

(ns my-district
  (:require [reagent.core :as r]
            [district.ui.component.meta-tags :as meta-tags]))

(defn main-panel []
  [:div#page1 [meta-tags/meta-tags {:title "My District" :description "A long and complete description of my district"}]])

(defn ^:export init []
  (r/render [main-panel] (.getElementById js/document "app")))

This will set the page title to "My District" and the content of the description meta tag. You can also pass additional custom meta-tags by adding more maps with and :id, :name and :content keys, after the :title and :description map:

[meta-tags/meta-tags {:title "title" :description "description"}
 {:id "id0" :name "foo" :content "foo"}
 {:id "id1" :name "bar" :content "bar"}]

Download Details:
Author: district0x
Source Code: https://github.com/district0x/district-ui-component-meta-tags
License:

#blockchain   #cryptocurrency   #district0x   #web3   #clojure 

District Web3 Utils: Set Of Functions Helpful for Working with Web3.js

district-web3-utils

Set of extra functions helpful for working with web3.js.

Installation

Add [district0x/district-web3-utils "1.0.3"] into your project.clj
Include [district.web3-utils] in your CLJS file

district.web3-utils

wei->eth [x]

Safely Converts wei into ether.

(web3-utils/wei->eth 1000000000000000000)
;; => "1"

(web3-utils/wei->eth (web3/to-big-number 1000000000000000000))
;; => #object[BigNumber 1]

(web3-utils/wei->eth "abc")
;; => nil

wei->eth-number [x]

Safely Converts wei into ether and coerces into number.

(web3-utils/wei->eth-number "1000000000000000000")
;; => 1

(web3-utils/wei->eth-number (web3/to-big-number 1000000000000000000))
;; => 1

eth->wei [x]

Safely Converts ether into wei.

(web3-utils/eth->wei 1.1)
;; => "1100000000000000000"

;; handles comma as fraction decimals separator as well
(web3-utils/eth->wei "1,1")
;; => "1100000000000000000"

eth->wei-number [x]

Safely Converts ether into wei and coerces into number.

(web3-utils/eth->wei-number "1.1")
;; => 1100000000000000000

zero-address? [address]

True if address is zero address

(web3-utils/zero-address? "0x")
;; => true

(web3-utils/zero-address? "0x0000000000000000000000000000000000000000")
;; => true

empty-address? [address]

True if address is zero address, empty string or nil

(web3-utils/empty-address? "0x")
;; => true

(web3-utils/empty-address? nil)
;; => true

remove-0x [address]

Removes initial "0x" from an address

(web3-utils/remove-0x "0x0000000000000000000000000000000000000000")
;; => "0000000000000000000000000000000000000000"

web3-time->date-time [x]

Converts time returned by smart-contracts (usually as BigNumber UNIX epoch) into cljs-time.

(web3-utils/web3-time->date-time (web3/to-big-number 1516223428))
;; => #object[Object 20180117T211028]

(web3-utils/web3-time->date-time 1516223428)
;; => #object[Object 20180117T211028]

(web3-utils/web3-time->date-time (web3/to-big-number 0))
;; => nil

web3-time->local-date-time [x]

Converts time returned by smart-contracts (usually as BigNumber UNIX epoch) into local cljs-time.

(web3-utils/web3-time->local-date-time (web3/to-big-number 1516223428))
;; => #object[Object 20180117T211028]

(web3-utils/web3-time->local-date-time 1516223428)
;; => #object[Object 20180117T211028]

prepend-address-zeros [address]

If given address is shorter than it should be, it prepends missing places with zeros.

(web3-utils/prepend-address-zeros "0x123")
;; => "0x0000000000000000000000000000000000000123"

bytes32->str [x]

Converts web3 bytes32 encoded string into normal string.

(web3-utils/bytes32->str "0x636f6e7374727563746564000000000000000000000000000000000000000000")
;; => "constructed"

uint->address [x]

Converts Solidity's uint into web3 address

(web3-utils/uint->address (web3/to-big-number 1234))
;; => "0x00000000000000000000000000000000000004d2"

Development

lein deps
# To run tests and rerun on changes
lein doo chrome tests

Download Details:
Author: district0x
Source Code: https://github.com/district0x/district-web3-utils
License: EPL-1.0 License

#blockchain   #cryptocurrency   #district0x   #web3   #clojure 

Set Of Functions Helpful for Working with Time

district-time

Set of functions helpful for working with time.

Installation

Add [district0x/district-time "1.0.1"] into your project.clj
Include [district.time] in your CLJS file

district.time

time-units [milis]

Divides given miliseconds into seconds, minutes, hours, days.

(time/time-units 400000000)
;; => {:seconds 40 :minutes 6 :hours 15 :days 4}

biggest-time-unit [{:keys [:seconds :minutes :hours :days]}]

Returns biggest positive time unit from given parameters.

(time/biggest-time-unit (time/time-units 400000000))
;; => [:days 4]

time-remaining [from-time to-time]

Time remaining from from-time to to-time. Passed times are from cljs-time format.

(time/time-remaining (t/now) (t/plus (t/now) (t/hours 3)))
;; => {:seconds 0 :minutes 0 :hours 3 :days 0}

time-remaining-biggest-unit [from-time to-time]

Returns biggest time unit from remaining time. Passed times are from cljs-time format.

(time/time-remaining-biggest-unit (t/now) (t/plus (t/now) (t/hours 3)))
;; => [:hours 3]

epoch->long [x]

Converts epoch to long time format.

(time/epoch->long 1516314507)
;; => 1516314507000

long->epoch [x]

Converts long to epoch time format.

(time/long->epoch 1516314507000)
;; => 1516314507

days->seconds [x]

Converts days to seconds.

(time/days->seconds 3)
;; => 259200

seconds->days [x]

Converts seconds to days.

(time/seconds->days 345600)
;; => 259200

Development

lein deps
# To run tests and rerun on changes
lein doo chrome tests

Download Details:
Author: district0x
Source Code: https://github.com/district0x/district-time
License: EPL-1.0 License

#blockchain   #cryptocurrency   #district0x   #web3   #clojure 

Set Of Functions Helpful for Working with Clojurescript

district-cljs-utils

Set of helper functions for working with vanilla Clojurescript, requiring no other 3rd party libraries. This is not meant to be replacement of similar libraries like medley, rather should be complementary.

Installation

Add [district0x/district-cljs-utils "1.0.4"] into your project.clj
Include [district.cljs-utils] in your CLJS file

district.cljs-utils

merge-in [& args]

Deep merge of multiple maps

(cljs-utils/merge-in {:a {:b 1}} {:a {:c 2}} {:a {:d 3}})
;; => {:a {:b 1 :c 2 :d 3}}

collify [x]

Ensures a collection.

(first (cljs-utils/collify 1))
;; => 1

(first (cljs-utils/collify [1]))
;; => 1

not-nil? [x]

Returns true if not nil

(cljs-utils/not-nil? 1)
;; => true

sort-desc [coll]

Descending sort

(cljs-utils/sort-desc [2 1 3])
;; => [3 2 1]

sort-by-desc [key-fn coll]

Descending sort by key-fn

(cljs-utils/sort-by-desc :a [{:a 2} {:a 1} {:a 3}])
;; => ({:a 3} {:a 2} {:a 1})

map-kv-at-keys [f keyseq m]

Maps a function over the key/value pairs of an associate collection, but only on given keys.

(cljs-utils/map-kv-at-keys #(vec [(dec %1) (inc %2)]) [8 7] {9 1, 8 2, 7 3})
;; => {9 1, 7 3, 6 4}

map-vals-at-keys [f keyseq m]

Maps a function over the values pairs of an associate collection, but only on given keys.

(cljs-utils/map-vals-at-keys inc [:b :c] {:a 1 :b 2 :c 3})
;; => {:a 1 :b 3 :c 4}

rand-str [n & [{:keys [:lowercase-only? :exclude-numbers?]}]]

Generates random alphanumeric string with n characters.

(cljs-utils/rand-str 10)
;; => "LpvMscagIw"

(cljs-utils/rand-str 10 {:lowercase-only? true})
;; => "frtkeahqus"

safe-assoc-in [m ks v]

Invariant version of assoc-in. Returns unchanged map if ks path is empty.

(cljs-utils/safe-assoc-in {:a 1} [:b :c] 2)
;; => {:a 1}

(cljs-utils/safe-assoc-in {:b {}} [:b :c] 2)
;; => {:b {:c 2}}

js-obj->clj [obj]

Converts JS object (instance of a class) into Clojure map

(:protocol (cljs-utils/js-obj->clj (aget js/window "location")))
;; => http:

kw->str [kw]

Stringifies keyword. In contrary to name, preserves namespace as well

(cljs-utils/kw->str :some.long/name)
;; => "some.long/name"

transform-keys [t coll]

Recursively transforms all map keys in coll with t.

(cljs-utils/transform-keys inc {1 "a" 2 "a" 3 {4 "a"}})
;; => {2 "a" 3 "a" 4 {5 "a"}}

transform-vals [t coll]

Recursively transforms all map values in coll with t.

(cljs-utils/transform-vals (fn [v]
                              (if (number? v)
                                (inc v)
                                v))
                            {:a 1 :b 2 :c {:z 3}})
;; => {:a 2 :b 3 :c {:z 4}}

Development

lein deps
# To run tests and rerun on changes
lein doo chrome tests

Download Details:
Author: district0x
Source Code: https://github.com/district0x/district-cljs-utils
License: EPL-1.0 License

#blockchain   #cryptocurrency   #district0x  #web3   #clojure 

District0x Network Token with Smart Contracts and Web App

district0x Network Token

ABIs

Contribution 0xf8094e15c897518b5ac5287d7070ca5850efc6ff:

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DNT 0x0abdace70d3790235af448c88547603b945604ea:

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Multisig 0xd20e4d854c71de2428e1268167753e4c7070ae68:

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Technical definition

At the technical level DNT is a ERC20-compliant token, derived from the MiniMeToken that allows for token cloning (forking), which will be useful for many future usecases.

Vesting functionality derived from VestedToken is also built-in into our token. Founders, advisors and early contributor have their tokens vested.

Contracts

Token:

• District0xNetworkToken.sol: Main contract for DNT token. Derives MiniMeToken and VestedToken
• MiniMeToken.sol: Our slightly modified version of Giveth's MiniMeToken
• VestedToken.sol: Our slightly modified version of OpenZeppelin's VestedToken

Contribution:

• District0xContribution.sol: Implementation of our token sale
• MultisigWallet.sol: Consensys multisig wallet used for district0x funds

Tests

To run our smart-contract tests you need to have node installed on your machine. Our tests are written in Clojurescript here tests.cljs, but they are compiled into Javascript here contribution-tests.js, so you don't need to do that. You can just run tests with following commands:

npm install
node contribution-tests.js

Read More:

• Contribution Period Flow

Download Details:
Author: district0x
Source Code: https://github.com/district0x/district0x-network-token
License: EPL-1.0 License

#blockchain   #cryptocurrency   #district0x   #web3   #clojure #smartcontract 

District0x Server Component for Setting Up Web3 Watcher

district-server-web3-watcher

Clojurescript-node.js mount module for a district server, that watches server connection to a blockchain.

Installation

Add [district0x/district-server-web3-watcher "1.0.3"] into your project.clj
Include [district.server.web3-watcher] in your CLJS file, where you use mount/start

Warning: district0x modules are still in early stages, therefore API can change in a future.

Real-world example

To see how district server modules play together in real-world app, you can take a look at NameBazaar server folder, where this is deployed in production.

Usage

You can pass following args to web3-watcher module:

• :interval Interval at which it should check the connection. Default: 3s
• :confirmations How many offline responses module needs to get before triggers :on-offline. Default: 3
• :on-online Callback that is run when connection goes from offline to online
• :on-offline Callback that is run when connection goes from online to offline

(ns my-district
    (:require [mount.core :as mount]
              [district.server.web3-watcher]))

  (-> (mount/with-args
        {:web3 {:port 8545}
         :web3-watcher {:on-offline #(println "Node went offline")
                        :on-online #(println "Node is online again")}})
    (mount/start))

Module dependencies

district-server-config

district-server-web3-watcher gets initial args from config provided by district-server-config/config under the key :web3-watcher. These args are then merged together with ones passed to mount/with-args.

district-server-web3

district-server-web3-watcher relies on getting web3 instance from district-server-web3/web3. That's why, in example, you need to set up :web3 in mount/with-args as well.

If you wish to use custom modules instead of dependencies above while still using district-server-web3-watcher, you can easily do so by mount's states swapping.

Development

# To start REPL and run tests
lein deps
lein repl
(start-tests!)

# In other terminal
node tests-compiled/run-tests.js

# To run tests without REPL
lein doo node "tests" once

Download Details:
Author: district0x
Source Code: https://github.com/district0x/district-server-web3-watcher
License: EPL-1.0 License

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