go ethereum - How can I make new account by JSON-RPC ...
JSON-RPC Server Go Ethereum
Deploy a smart contract via React to actual Ethereum network instead of Truffle or Ganache?
I am building a react application using web3 to interface with Ethereum. At a bare minimum, it needs to create a contract, deploy said contract, store a value (i.e. a string: "test"), then later retrieve that value. All this needs to happen in the React application and on the ethereum network. No test networks, no outside tools to deploy the contract. I can't seem to find a reference on how to accomplish this, for what is really a simple task. All tutorials I could find focus on Ganache or Truffle and use outside means to deploy the contract...
Introducing "Zaidan's War Chest," a ZRX staking pool
Update on Zaidan v2 progress
Zaidan Dealer public API specification update
Zaidan's War Chest: a ZRX staking pool
As part of version 3 of the 0x protocol, 0x announced the inclusion of liquidity incentives for market makers via the introduction of a protocol fee that can be re-claimed by market makers and delegators who stake ZRX. Be sure to see their blog post for more information about this new feature. After migrating our Zaidan (v1) system to use 0x v3.0, we created one of the first mainnet ZRX staking pools — dubbed "Zaidan's War Chest" — and became [the first mainnet pool to be added to the 0x staking pool registry,]((https://github.com/0xProject/0x-staking-pool-registry/pull/2)) which will eventually power a hosted UI for market makers and delegators. Until the UI is launched, which will allow users to delegate their ZRX to us and other pool operators with a single click, the determined can still delegate to our pool (pool ID 6) by following this guide. Stay tuned for more information about "Zaidan's War Chest" and keep an eye out for the 0x web interface!
Update on Zaidan v2 progress
Since we began our primarily-golang v2 implementation (which will satisfy the Dealer JSONRPC spec, see below) in early December, the system has started to take shape. At this point, we have created brand new implementations in Go of our hot-wallet server, the dealer public API server, an exchange order book manager, and an Ethereum transaction watcher Additionally, we are progressing on a new python pricing and risk-management module as we continue to improve all of the services. Over the coming weeks, our focus shifts to integrating the components, completing the implementation of the public API, testing, fixing bugs, and making performance enhancements where possible. We will continue to post updates on the systems progress, and expect to on-board users to the new version sometime in February.
Zaidan Dealer public API specification update
In our last update, we announced the publication of an initial draft of our upcoming Zaidan Dealer JSONRPC specification. This public API specification is an important step for the Zaidan project, as we begin to formalize the 0x-based RFQ dealer model we introduced in November. Over the past several weeks, we have been continually improving and enhancing the specification with input from the 0x team. It is our intention to create a model that is as open, approachable, and useful for as many market participants as possible. Over the coming weeks, we intend to "freeze" the spec and mark it as v1.0-beta to indicate it approaching its final form. As we continue to implement our version of the Dealer JSONRPC (Zaidan v2), we hope to demonstrate the efficacy of the model, and eventually encourage more market makers to create their own implementations. We intend to provide a suite of tools to make this process much easier than building an implementation from scratch. Follow along with the specification's progress on GitHub. Thanks for reading, and be sure to check back in for more development, community, and research updates. Henry Harder CTO, Paradigm Labs [email protected] For more updates like this, follow us on Reddit, Twitter, Medium, and join our community chat server. All code related to Kosu discussed in this post can be found in the Kosu monorepo on GitHub. The Zaidan dealer system is proprietary at this time, but there is an open-source client available on GitHub.
Development Update (November): Public Zaidan API spec, 0x v3 and multi-collateral DAI, a Kosu update, and more.
Hello /ParadigmMarket (formerly /ParadigmFoundation)! If you're new here or haven't already, be sure to check out our recent announcements. Thanks for reading out latest update. November was another busy month for us, with some exciting progress made on our recently announced Zaidan trading system. Be sure to checkout other recent updates on our (old) subreddit for a more complete picture of our recent progress. Note: have just moved to /ParadigmMarket. Our old updates can be found on /ParadigmFoundation.
Highlights
Draft of the first Zaidan Dealer public API
Upgrading Zaidan (beta) to use 0x V3 and MCD
Stability of the Kosu client and test-network
Draft of the first Zaidan Dealer public API
We're excited to announce that we have published the first draft of the Zaidan Dealer JSONRPC specification (A.K.A. Zaidan JSONRPC, or Dealer JSONRPC). This is an important step for Zaidan, as it formalizes the model we have been developing here at Paradigm Labs over the past several months by defining a public API that anyone may implement. It is the first milestone in the journey towards our long-term vision of a diverse marketplace of non-custodial dealer systems built on 0x. Paradigm Labs will be building the first production system that implements this API to 1) demonstrate the efficacy of the model, and 2) familiarize a community of traders and developers with Zaidan, with the long-term goal of encouraging additional Dealer implementations. Stay tuned for more updates on this front. We expect the API specification to stabilize over the coming weeks and to have more information about our upcoming implementation (which will replace the current beta/proof-of-concept currently supporting our trade portal).
Upgrading Zaidan (beta) to use 0x V3 and MCD
This past week, 0x activated version 3 of their protocol, following a successful governance vote in late November. We're please to announce that we have upgraded our current Zaidan beta (NOT using the Zaidan JSONRPC) to use the new 0x v3.0 exchange contract for settlement, one day after the contracts were activated on the Ethereum main-network. For traders using our hosted web interface, no action is necessary, as the latest client version has been built into the interface. Traders who use the API directly with the JavaScript client must update to v0.7.0-beta.4 or later in order to continue using the system. Additionally, we have removed support for SAI (single collateral DAI v1.0) and now support the new multi-collateral DAI token. If you have SAI (old DAI) you need to migrate to the new DAI, we suggest using Maker's official migration portal which offers 1:1 SAI-to-DAI swaps. Read more about the historic multi-collateral DAI launch here.
Stability and feature completion of the Kosu client
Over the past several weeks, the Kosu project (client implementation, contract suite, and libraries) has increasingly stabilized as the project reached feature-completion. We've been intensely focused on Kosu for the last ~34 weeks, pushing >2600 commits in 6 languages across 21 packages. Just in the last 24 hours, our internal test-network validated block 1,000,000 after operating under a simulated high-load environment for the past ~month. While this metric is arguably meaningless in a non-adversarial environment, it is still an important testament to the ever-increasing stability of our Go client implementation (kosud). Although he codebase has matured significantly and reached a place of stability, we're far from done with Kosu. There are still several crucial things that must take place before a main-network launch, such as Solidity contract audits, a remote-signer binary, and other supporting documentation and tooling. You will hear more about Kosu's development and what lies ahead in the coming months, but expect less major development updates and breaking changes for Kosu as it has essentially reached feature-completion, and as we shift our short-term focus to building and shipping Zaidan. Track the Kosu (test) network live statistics on our hosted web-explorer. Metamask or other web3 browser required. Thanks for reading, and be sure to check back in for more development, community, and research updates. Henry Harder CTO, Paradigm Labs [email protected] For more updates like this, follow us on Reddit, Twitter, Medium, and join our community chat server. All code related to Kosu discussed in this post can be found in the Kosu monorepo on GitHub. The Zaidan dealer system is proprietary at this time, but there is an open-source client available on GitHub.
Development Update (October): Company announcements, feature-complete client, protocol enhancements, Zaidan, and more.
Hello /ParadigmFoundation! If you haven't already, read about our recent announcements here. Thanks for reading out latest update. October was another busy month for the Kosu team, with several important milestones reached, including the release of the first feature-complete Go Kosu version. Additionally, this update marks the first time we will discuss our recently announced request-for-quotation (RFQ) trading system built on 0x, Zaidan. All future development updates will include topics from both Kosu and Zaidan, rather than just Kosu. Be sure to checkout other recent updates on our old subreddit for a more complete picture of our recent progress. Note: we will soon move to /ParadigmMarket.
Highlights
Feature completion of Kosu network client
Investigating and solving a client performance issue
Overview of upcoming protocol enhancements
Updates for our recently announced project, Zaidan
Feature completion of Kosu network client
As mentioned in September's update, we did indeed release Go Kosu v0.4 in early October. This release marked the first feature-complete version of the network client, fully implementing the network described in the Kosu whitepaper. The primary feature introduced in the v0.4 release that pushed kosud to feature completion was the Kosu "order book:" a fixed-size (yet parameterizable) first-in-first-out stack of recent orders kept in-state. Without this feature, the only way to interact with the Kosu order book was to subscribe to order transactions and maintain your own, or dig through the blockchain and "manually" decode historical orders. Now, any full node or light client can provide the Kosu JSONRPC, now with the latestOrders endpoint, providing a way to page through recent orders and bootstrap a local order book. This feature is especially important for future Kosu light-clients (see last development update) who otherwise would have difficulty bootstrapping an order book. Implementation of this feature did not occur without incident, and presented an interesting learning opportunity for us. The addition of such a dynamically changing data structure presents challenges when tasked with storing the orders within the Kosu application state trie (ultimately a merkle tree under the hood). Our initial implementation introduced in v0.4 performed fine during generation of the blockchain (normal block processing), but put intense strain on the host machine during syncing of nodes, and in providing the JSONRPC to clients. This issue was addressed with a new CosmosSDK-based list implementation we merged in last week, prior to releasing v0.5 which is now considered to be stable. Read more about this issue and our steps to solve it in the next section.
Investigating and solving a performance issue
As mentioned above, we spent a significant amount of time last month investigating (and ultimately solving) an issue with our order set implementation that was quite difficult to isolate. Ultimately, the issue was with the initial interface and implementation of this order "list" which was highly inefficient under load, and even led to process termination in full nodes when serving the JSONRPC under certain conditions. We first noticed the issue the morning after we tagged v0.4 and had begun to run the new client version on our internal geographically distributed Kosu test network. We noticed the first symptom after the new v0.4 chain had been running for about a day with only validator nodes. When we tried to sync a new full node with the network, the full node was almost instantly put under intense load (>98% CPU load) as well as the other validators in the network. This led to a temporary halt in new-block production, and the inability for us to sync full nodes. After restarting the network, this time starting a full node alongside the validators, we noticed the full node was able to keep in-sync with the chain, seemingly without errors. Confused, and tempted to blame Tendermint (which has introduced issues in new version in the past) we enabled the full-node's RPC server and set up a monitoring server to track CPU load, memory usage, file descriptor usage, and other metrics. After turning on some of our peripheral services that consume the Kosu JSONRPC, we noticed that the full node would crash after a period of time (6-12 hours) serving the JSONRPC, with a panic related to the number of open file descriptors (limited to 1024 on most modern systems by default). This was our first major clue. Confirmed by our monitoring dashboard, the full-node serving the JSONRPC would have a suspiciously high open file descriptor count compared to the validators that were not serving the JSONRPC. This indicated either a gross implementation inefficiency or some resource leak. At this point, and after doing more local testing, Gus, our primary Golang engineer suspected the issue may be with the new order list implementation. He then quickly introduced a new implementation using packages provided by the Cosmos SDK team. After deploying a development build with the new change to the internal test network, we were unable to re-create the issue and deemed it solved, subsequently releasing Go Kosu v0.5. We consider this latest version to be stable, and it has been powering our internal test-network (kosu-wormhole-14) for >400,000 blocks at time of publication. View the latest network stats here (MetaMask required, and select Ropsten network).
Overview of upcoming protocol enhancements
As Kosu stabilizes and gets closer and closer to being ready for public scrutiny and testing, we're excited to announce we will be making a set of changes to some core pieces of staking and key management logic to Kosu, prior to a public announcement. These changes are focused on providing increased ability for validators to optimize their security configurations, by allowing distinct keys for consensus and application-level messages (incl. support for remote signers and HSMs), the ability to authorize limited-access "proxy accounts" to commit and reveal votes on behalf of stakeholders, as well as a change to the logic used to calculate a validators vote power on the Tendermint network. Expect many more details about these changes over the coming weeks as we formalize their specification and begin necessary implementation changes. We believe that all stakeholders will benefit from these relatively minor changes to the protocol. In particular, we believe validators will be able to provide higher-quality services to the network and other stakeholders by being more confident in their operational setups. The first of these proposals landed in the kosu-monorepo master branch this week. It adds the ability for users of the Kosu contract system to authorize and de-authorize limited-access proxy accounts that may commit and reveal votes on behalf of the owner. Read more about these changes and their justification in the PR.
Updates for our recently announced project, Zaidan
Be sure to see the Zaidan announcement before reading this section. This past week, we were excited to announce Zaidan: a non-custodial RFQ trading system built on 0x we have quietly been developing over the past several months. From now on, our development updates will include news from both the Kosu and the Zaidan projects being developed under the umbrella of Paradigm Labs. Zaidan is developed very much in the same "decentralized trading" ecosystem as Kosu, but it is a very different project that targets different users, and solves a distinct problem. Zaidan is designed to offer a simple, highly competitive single-transaction trading experience for end users, by leveraging ZEIP-18 (a feature of 0x) and an architecture that uses existing centralized exchanges to provide liquidity and competitive pricing for end users. While Zaidan is fully non-custodial, in that it uses 0x's on-chain settlement logic to facilitate the transfer of assets between traders, it does require a single central operator (for now). We plan to generalize the Zaidan model over the coming months, with the end goal of creating a dealer-based RFQ trading network (similar in some ways to the construction of NASDAQ) for Ethereum-based assets. Last month, we pushed our "v1" Zaidan dealer system to feature-completion, and this month are opening it up to the public for a limited beta of the REST API and the web interface (see instructions in the announcement). Unlike Kosu, the initial Zaidan dealer is a proprietary system, and is being developed in a private repository. However, the TypeScript client library is open-source. Be sure to stay tuned for more announcements and information about Zaidan over the coming weeks and months. Thanks for reading, and be sure to check back in for more development, community, and research updates. Henry Harder CTO, Paradigm Labs [email protected] For more updates like this, follow us on Reddit, Twitter, Medium, and join our community chat server. All code related to Kosu discussed in this post can be found in the Kosu monorepo on GitHub. The Zaidan dealer system is proprietary at this time, but there is an open-source client available on GitHub.
Investigating and solving a client performance issue
Overview of upcoming protocol enhancements
Updates for our recently announced project, Zaidan
Feature completion of Kosu network client
As mentioned in September's update, we did indeed release Go Kosu v0.4 in early October. This release marked the first feature-complete version of the network client, fully implementing the network described in the Kosu whitepaper. The primary feature introduced in the v0.4 release that pushed kosud to feature completion was the Kosu "order book:" a fixed-size (yet parameterizable) first-in-first-out stack of recent orders kept in-state. Without this feature, the only way to interact with the Kosu order book was to subscribe to order transactions and maintain your own, or dig through the blockchain and "manually" decode historical orders. Now, any full node or light client can provide the Kosu JSONRPC, now with the latestOrders endpoint, providing a way to page through recent orders and bootstrap a local order book. This feature is especially important for future Kosu light-clients (see last development update) who otherwise would have difficulty bootstrapping an order book. Implementation of this feature did not occur without incident, and presented an interesting learning opportunity for us. The addition of such a dynamically changing data structure presents challenges when tasked with storing the orders within the Kosu application state trie (ultimately a merkle tree under the hood). Our initial implementation introduced in v0.4 performed fine during generation of the blockchain (normal block processing), but put intense strain on the host machine during syncing of nodes, and in providing the JSONRPC to clients. This issue was addressed with a new CosmosSDK-based list implementation we merged in last week, prior to releasing v0.5 which is now considered to be stable. Read more about this issue and our steps to solve it in the next section.
Investigating and solving a performance issue
As mentioned above, we spent a significant amount of time last month investigating (and ultimately solving) an issue with our order set implementation that was quite difficult to isolate. Ultimately, the issue was with the initial interface and implementation of this order "list" which was highly inefficient under load, and even led to process termination in full nodes when serving the JSONRPC under certain conditions. We first noticed the issue the morning after we tagged v0.4 and had begun to run the new client version on our internal geographically distributed Kosu test network. We noticed the first symptom after the new v0.4 chain had been running for about a day with only validator nodes. When we tried to sync a new full node with the network, the full node was almost instantly put under intense load (>98% CPU load) as well as the other validators in the network. This led to a temporary halt in new-block production, and the inability for us to sync full nodes. After restarting the network, this time starting a full node alongside the validators, we noticed the full node was able to keep in-sync with the chain, seemingly without errors. Confused, and tempted to blame Tendermint (which has introduced issues in new version in the past) we enabled the full-node's RPC server and set up a monitoring server to track CPU load, memory usage, file descriptor usage, and other metrics. After turning on some of our peripheral services that consume the Kosu JSONRPC, we noticed that the full node would crash after a period of time (6-12 hours) serving the JSONRPC, with a panic related to the number of open file descriptors (limited to 1024 on most modern systems by default). This was our first major clue. Confirmed by our monitoring dashboard, the full-node serving the JSONRPC would have a suspiciously high open file descriptor count compared to the validators that were not serving the JSONRPC. This indicated either a gross implementation inefficiency or some resource leak. At this point, and after doing more local testing, Gus, our primary Golang engineer suspected the issue may be with the new order list implementation. He then quickly introduced a new implementation using packages provided by the Cosmos SDK team. After deploying a development build with the new change to the internal test network, we were unable to re-create the issue and deemed it solved, subsequently releasing Go Kosu v0.5. We consider this latest version to be stable, and it has been powering our internal test-network (kosu-wormhole-14) for >400,000 blocks at time of publication. View the latest network stats here (MetaMask required, and select Ropsten network).
Overview of upcoming protocol enhancements
As Kosu stabilizes and gets closer and closer to being ready for public scrutiny and testing, we're excited to announce we will be making a set of changes to some core pieces of staking and key management logic to Kosu, prior to a public announcement. These changes are focused on providing increased ability for validators to optimize their security configurations, by allowing distinct keys for consensus and application-level messages (incl. support for remote signers and HSMs), the ability to authorize limited-access "proxy accounts" to commit and reveal votes on behalf of stakeholders, as well as a change to the logic used to calculate a validators vote power on the Tendermint network. Expect many more details about these changes over the coming weeks as we formalize their specification and begin necessary implementation changes. We believe that all stakeholders will benefit from these relatively minor changes to the protocol. In particular, we believe validators will be able to provide higher-quality services to the network and other stakeholders by being more confident in their operational setups. The first of these proposals landed in the kosu-monorepo master branch this week. It adds the ability for users of the Kosu contract system to authorize and de-authorize limited-access proxy accounts that may commit and reveal votes on behalf of the owner. Read more about these changes and their justification in the PR.
Updates for our recently announced project, Zaidan
Be sure to see the Zaidan announcement before reading this section. This past week, we were excited to announce Zaidan: a non-custodial RFQ trading system built on 0x we have quietly been developing over the past several months. From now on, our development updates will include news from both the Kosu and the Zaidan projects being developed under the umbrella of Paradigm Labs. Zaidan is developed very much in the same "decentralized trading" ecosystem as Kosu, but it is a very different project that targets different users, and solves a distinct problem. Zaidan is designed to offer a simple, highly competitive single-transaction trading experience for end users, by leveraging ZEIP-18 (a feature of 0x) and an architecture that uses existing centralized exchanges to provide liquidity and competitive pricing for end users. While Zaidan is fully non-custodial, in that it uses 0x's on-chain settlement logic to facilitate the transfer of assets between traders, it does require a single central operator (for now). We plan to generalize the Zaidan model over the coming months, with the end goal of creating a dealer-based RFQ trading network (similar in some ways to the construction of NASDAQ) for Ethereum-based assets. Last month, we pushed our "v1" Zaidan dealer system to feature-completion, and this month are opening it up to the public for a limited beta of the REST API and the web interface (see instructions in the announcement). Unlike Kosu, the initial Zaidan dealer is a proprietary system, and is being developed in a private repository. However, the TypeScript client library is open-source. Be sure to stay tuned for more announcements and information about Zaidan over the coming weeks and months. Thanks for reading, and be sure to check back in for more development, community, and research updates. Henry Harder CTO, Paradigm Labs [email protected] For more updates like this, follow us on Reddit, Twitter, Medium, and join our community chat server. All code related to Kosu discussed in this post can be found in the Kosu monorepo on GitHub. The Zaidan dealer system is proprietary at this time, but there is an open-source client available on GitHub.
Ethereum private key with all zeroes leads to an account with 5000$ on it
The private key 0000000000000000000000000000000000000000000000000000000000000000 generates the address 0x3f17f1962B36e491b30A40b2405849e597Ba5FB5, which has 10 ethereums on it. See https://etherscan.io/address/0x3f17f1962B36e491b30A40b2405849e597Ba5FB5 and https://ethdir.io/ first page . However, when I try to import it or sign a transaction with it, the network refuses to take the raw tx. How is it possible that people can send ethereums to that address yet it is virtually unreachable on the network? The error message is "Error! Unable to broadcast Tx : {"jsonrpc":"2.0","id":1,"error":{"code":-32000,"message":"invalid sender"}}".
Adding good peers to ethereum node using etherscan
My ethereum node was having very less number of peers, an hence syncing was slow. Etherscan provides a list of enode urls but I required something to copy all the enodes and add them to my peer list of Ethereum. So I created a script which runs on etherscan node explorer page https://etherscan.io/nodetrackenodes in browser console and gets all enode URLs. These URLs are converted to commands which can be pasted in server console directly to add them as peers. The script used is given below
var enodeTable = document.getElementsByClassName("table")[0] var enodeList = [] var info = [] var commandList = [] var commandStart = 'curl --data \'{"jsonrpc":"2.0","method":"parity_addReservedPeer","params":["'; var commandEnd = '"],"id":0}\' -H "Content-Type: application/json" -X POST localhost:8545' for (i = 1; i < enodeTable.rows.length; i++) { var enodeUrl = ""; var command= ""; // GET THE CELLS COLLECTION OF THE CURRENT ROW. var objCells = enodeTable.rows.item(i).cells; var btn = objCells[8] copySpan = btn.getElementsByClassName("d-none") enodeUrl = copySpan[0].innerText enodeList.push(enodeUrl); command = commandStart + enodeUrl + commandEnd; commandList.push(command); } var arrLength = commandList.length for(i=0; i< arrLength; i++) { console.log(commandList[i]); }
QuarkChain burned 40% (4 Billion) ERC20 tokens and converted them into mainnet mining rewards.
Guardian Plan Update: Term I has been finished, and the corresponding rewards have been released. The second term of Aegis Guardians and Elf Guardians are performing the duties.
QKC was listed on PIEXGO, which opened QKC/USDT, QKC/BTC trading. Meanwhile, UDAP was officially listed on PIEXGO and became the first IXO project in QuarkChain’s eco-partnership layout.
QuarkChain together with 47 companies and organizations joined in Binance’s Charity to unveil a stable coin for the alleviation of period poverty.
The QuarkChain team actively participated in online and offline activities. They discuss how the blockchain ecosystem can apply in all walks of life, and the general trend of the blockchain industry with people from various trades and industries.
1. QuarkChain News
Development Progresses # Major Updates ## Added
Supported the function to enforce minimum gas price for accepting transactions and mining block inclusion
Supported the function of discarding under-priced transactions when the transaction queue is full
Added a new function of turning on/off public and private JSONRPC servers in the configuration
Implemented database integrity check tooling to make sure the consensus algorithm will not break after new code changes by replaying the whole blockchain history
Added utility scripts for coinbase and balance-related calculations
Implemented the function of showing the whole transaction history in any shard
Supported turning on profiling mode for measuring cluster performances
Added a token ID parameter to ‘gasPrice’ JSONRPC endpoint
## Updated
Improved block processing performance during synchronization and blockchain history replay, where the time usage of replaying the whole history dropped from 1 day to 1 hour
Simplified cross-shard transaction processing with more testing scenarios
Improved transaction history lookup function by normalizing addresses in the same full shard ID
## Fixed
Fixed cross-shard transaction gas consumption calculation for root chain coinbase rewards
QuarkChain mainnet officially opens transaction function In accordance with the consensus and roadmap, we are pleased to announce that QuarkChain mainnet now officially opens the transaction function. We welcome community members to use it and experience the smooth transaction brought by the QuarkChain sharding technology. For more details, please click HERE. QuarkChain burned 40% (4 Billion) ERC20 tokens According to the original token distribution plan, 4 billion tokens will be awarded to miners as total mining rewards. In order to convert these tokens into mainnet mining rewards, QuarkChain burned these tokens in the ERC20 contract and converted them into mainnet mining rewards. For more details, please click HERE. QuarkChain Guardian Plan Term I Ended and Term II Election Result Was Announced As Term I guardian plan ended, QuarkChain already sent the corresponding rewards to the guardians and to the voters at the promised rebate ratio. Meantime, the second term of the Guardian Plan poll ended. Members can check the election result. Considering that staking restricts the users to participate in other activities, we decided to postpone the launch of the third term of the Guardian Plan, and will restart it at a better time. For more details, please click HERE.
2. Partnerships
QKC Was Listed on PIEXGO PIEXGO officially listed QKC on July 1, 2019, which opened QKC/USDT, QKC/BTC trading. Top 20 winners in the QKC trading competition were announced. Thank everyone for the enthusiastic participation in the QKC trading competition. The rewards will be issued within 7 working days after the list announced. For more details, please click: https://piexgo.zendesk.com/hc/en-us/articles/360030650991-Top-20-Winners-of-QKC-Trading-Competition-Announced UDAP Launched on PIEXGO doing IXO and Became the First Project Using QKC to Do the Fundraising UDAP was officially listed on PIEXGO and became the first IXO project in QuarkChain’s eco-partnership layout. QuarkChain’s secure, flexible and high throughput underlying technology, coupled with UDAP’s role that links various application layers, will enable the measurement and connection of various virtual and physical assets, and ultimately achieve wide commercial applications. For more details, please click HERE. QuarkChain participated in Binance’s charity event and promoted global women’s health with “Pink Coin” July 3, 2019 — Binance Charity Foundation announced the first strategic alliance of 46 companies and organizations as founding partners to introduce ‘Pink Care Token’ (PCAT). Dr. Qi Zhou-QuarkChain’s founder and CEO said: “This 46-agency alliance event is a grand philanthropy with different strengths. QuarkChain’s flexibility is compatible and inclusive. We are willing to provide technical assistance within our capabilities for the release of the Pink Care Token to create more well-being for women around the world.” For more details, please click HERE. Partnership with Rebit AI https://preview.redd.it/prph3jmqax931.png?width=1218&format=png&auto=webp&s=466adee10a3d49b13899b3c54ab714faf833c447 REBIT AI is a company that has been a 15-year solution partner to Samsung Electronics which provided embedded keyboard solutions to some of Samsung’s Galaxy series. With this technology, REBIT AI is prepared a crypto rewarding keyboard DApp. Through the partnership with Samsung Electronics REBIT AI’s keyboard has finished testing for all languages, which makes it one of the only 4 keyboard applications that can provide such language coverage in the world. It will provide AI-based word completion and suggestion as Galaxy smartphone keyboards do. Furthermore, the DApp will utilize AI-based big data analytics and recommendation technology, which has been developed with Samsung Electronics but not used in its phones, for AD targeting and big data services. REBIT AI has already created a business model based on its big data competencies and is in steps of advancing it. As such, top Korean companies like KT(Telecom), ActozSoft, Netmarble, global Ad platform YeahMobi, and MotherBrain have already partnered with REBIT AI and is currently expanding its partnerships also into India and Japan. REBIT AI CEO Donjun Shin is upset about seeing the low utilization of unstructured big data and therefore has great expectations for its crypto rewarding keyboard business. We are very happy to have REBIT AI as a member of QuarkChain Ecosystem
3. Marketing Events and Activities
6/27 Consensus, On-Chain Governance and Economic Models in the World of Blockchain in San Francisco Around 100 delegates joined the event of Consensus, On-Chain Governance and Economic Models in the World of Blockchain. Industry experts and leaders from investment, finance, blockchain presented and participated in keynote and various panel discussions. With the theme, “Consensus, On-Chain Governance and Economic Models in the World of Blockchain”, this event explored several key topics relating to consensus, on-chain governance and economic models from technology and investment perspective. 6/28 Chongqing Liangjiang New Area Event in Silicon Valley https://preview.redd.it/b8vl2zhpax931.png?width=1212&format=png&auto=webp&s=bfdad42939651ec4027697cef664ef38953c10b6 Chongqing Liangjiang New Area Investment Delegation visited the United States in June. The event was held in Silicon Valley Science and Technology Innovation Center on June 28. QuarkChain was invited to participate in the event as an outstanding start-up enterprise in Silicon Valley. The leaders of Chongqing Liangjiang New Area had a deep discussion on QuarkChain’s enterprise solution. The director highly praised QuarkChain’s technology development and will continue in-depth cooperation with QuarkChain in the future. 6/29 The Ethereum Technology & Application Convention https://preview.redd.it/kvayo8qxcx931.png?width=1144&format=png&auto=webp&s=e4f96fdaaf22497b91ccc5d907c997fe2faa515e The Ethereum Technology & Application Convention organized by CSDN, Linktime was held on June 29–30 in Beijing. QuarkChain engineer Ping Ke was invited to participate in the event. They discussed Ethereum 2.0, blockchain tech with Vitalik Buterin and other industry leaders. During the event, Ping Ke introduced QuarkChain’s state sharding technology to offer a better solution to blockchain trilemma. Vitalik Buterin said using sharding technology is his next step. 6/29 GCDC2019 GOS Chain Eco-application Developers Conference https://preview.redd.it/0qx18qb4dx931.png?width=1174&format=png&auto=webp&s=bb77056c9135552fd2715e3b59fe6727fb2e0e37 GOS Chain Eco-application Developers Conference was held in Hangzhou on June 29. The conference invited famous scholars, developers, and scientists to show the frontier public chain technology of GOS Chain to developers, industry partners and enterprises from all over the country. During the conference, attendees explained the direction of investment development and discussed the ecological application of the blockchain. QuarkChain scientist Dr. Yaodong Yang was invited to attend the event and he delivered a keynote speech entitled “Shards and Flexibility of Blockchain”. 7/4 QuarkChain Founder and CEO Dr. Zhou Joined Online Discussion about Libra On July 4, Dr. Qi Zhou — QuarkChain CEO and founder attended BibiNews’ sharing session and explored Libra’s opportunities and challenges. Dr. Zhou indicated that QuarkChain hopes to work with Libra in the field of public chain technology and learn from each other. Libra wants to implement the blockchain technology for serving 1 billion people, but Libra can’t do it yet, and QuarkChain already has the solutions. In addition, it is worth learning that Libra can work with high-quality business partners and participate in community governance. 7/4 QuarkChain CMO attended “Is Libra the Future of Blockchain” Panel https://preview.redd.it/cj46uymcdx931.png?width=1206&format=png&auto=webp&s=739eab0ebeef410dba674c342834ca8b839bd5cf On July 4, QuarkChain co-founder and CMO Anthurine Xiang attended an event that was organized by InVault. In the panel, she discussed views on Libra alongside big institutions such as McDonald, the Chinese Academy of Science Institute, Alipay’s Antfin and Alchemint. The entrance of mainstream traditional institutions brings more users, at the same time, it can also let us learn how mainstream institutions think of the blockchain industry. 7/6 CMO Joined BIGGERCHAIN 2019 China’s blockchain leaders Forum https://preview.redd.it/a91ogc3edx931.png?width=1270&format=png&auto=webp&s=3a4c6cbf51a5da58e1ea29374f13debbcdf25cc5 At the BIGGERCHAIN 2019 China’s blockchain leaders Forum, held in China on July 6, QuarkChain CMO Anthurine gave an excellent speech about how public blockchain will evolve in the future. Staking also became a topic of discussion. Anthurine discussed the topic of “Benefit & Equity- The Rising of Staking Economic” and commented about the benefits of staking, capital security and how to attract the participators. Anthurine Xiang believes that “Staking” can be understood as pledging. However, staking also has the meaning of stock equity and earnings. Staking emphasizes participation. We encourage people to participate in community ecological development and become part of it, rather than simply gaining benefits by investing tokens in nodes. The meaning of staking is to encourage people to participate in community ecology.
Upcoming Event
Tortoise in China https://preview.redd.it/5cxu1o3gdx931.png?width=1222&format=png&auto=webp&s=24e615cccdd9a914707bc6c7a60aa85c98c97269 Tortoise in China is a field visiting project which lasts nearly half a year. It includes in-depth interviews with 50 representative people inside and outside the industry and interviews with 100 benchmarking enterprises in the industry. CBO Du Ting, QuarkChain co-founder, will participate in the round table “Application Discussions”. He will share how QuarkChain uses sharding technology to achieve application landing. 7/14 Block Global ECO Summit https://preview.redd.it/d4cxui5idx931.png?width=1302&format=png&auto=webp&s=0a07b0d25db1425b74354411e4429a6a2652b37a On July 14, the 2019 Block Global ECO Summit hosted by BLOCK GLOBAL, Block360 and GLOSFER will be held in Shenzhen, China. QuarkChain co-founder and CBO Du Ting, CMO Anthurine will participate in the event. This summit will focus on blockchain technology and application, and discuss how to control the timing before the bull market. Industry experts will share the latest development results of blockchain policy, standards, technology, and application. Ting Du and Anthurine will discuss the industrial ecology and risks of blockchain, and explore the global development trend of blockchain.
# Core Updates ## Major Milestones - Successfully launched mainnet on April 30, 2019 ## Added - Released the mainnet AWS AMI - Provided the mining tutorial based on AWS AMI - Added indexing for minor blocks - Added JSONRPC endpoint to provide P2P routing table for better debuggability - Updated outdated JSONRPC documents - Updated JSONRPC documents to support token swap ## Changed - Enhanced transaction pools - Updated mainnet bootstrap nodes’ IP - Added mainnet bootnode config for qrktool ## Fixed - Removed unused parameters when adding the root blocks
Partnership
https://preview.redd.it/f8if3nuhdhy21.png?width=1444&format=png&auto=webp&s=2a298e911afb1a5beaedd4d4482e281e4006ed4b CBNT (Create Breaking News Together) is a decentralized blog platform based on blockchain technology and an ecosystem model of DPGC (Decentralized Professional Generated Content). CBNT has a unique model of “participating is mining” in which writing content, liking and commenting on all counts towards mining. With an internal incentive mechanism, a positive interaction will be forged between authors and viewers, and high-quality content will be generated. At CBNT, due to the unique mining model, a large number of transactions will be recorded on chain, with the goal of being a truly decentralized project. CBNT is eager to find a blockchain with high performance. The mainstream blockchains, like Ethereum, are not adequate for the needs of CBNT. Limited throughput ability will affect the transaction processing speeds, or even trigger network congestion. This is especially true in high-frequency processing scenarios, like content sharing and social mining. In addition, the high gas fees also stop users’ willingness to interact on the CBNT platform, and thus a new blockchain is needed! With its high throughput, flexibility, and performance, QuarkChain is qualified to solve the CBNT’s problems. On the QuarkChain network, transactions at any time and place will be completed and confirmed quickly, on the grounds of its sharding technology. As the number of shards increases, the transaction speed will increase in a linear way. The TPS on mainnet is expected to reach 100K+, and the testnet has already achieved a speed of 14,000+ TPS. With QuarkChain’s high throughput network, they give the maximum potential to achieve a decentralized and highly efficient next-generation blog.
3. Event
Consensus NY 2019 Consensus was the one global conference and expo that brought entrepreneurs, intrapreneurs, traders, developers, academics, students and people with curiosity together under one roof to explore, collaborate and debate the future of blockchain and crypto. QuarkChain CMO Anthurine Xiang was invited to attend Block Plus Summit. She moderated a panel discussion: Platform Wars and Privacy Protection in Blockchain. Stephen Tse, founder and CEO of Harmoney, Sandeep Nailwal, COO of Matic Network, Jason Qiao, Chief Ecosystem Officer of PlatOn joined in this panel, and gave their opinions about blockchain platform now and future. Consensus After Party-Meet QuarkChain, Polkadot and AVA Labs https://preview.redd.it/kc128oliehy21.png?width=1186&format=png&auto=webp&s=bbeaa96d18ae36b8d04c7e14fda73a74fa37b248 May 13, Anthurine Xiang, CMO of QuarkChain, together with Polkadot and AVA Labs hold an event about public chain and cross chain at Midtown Hilton. During the event, they shared their opinions about public chain and cross chain. Anthurine detailed introduced QuarkChain 2.0: one of the greatest features of QuarkChain 2.0 is flexibility, which extends to being friendly to new technologies and having stronger self-evolution capabilities. That is to say, each shard can have its own consensus mechanism, ledger model, transaction model, and token economics. With this, we can even include existing public chains. Sharding Technology Panels https://preview.redd.it/z61yscpgehy21.png?width=1122&format=png&auto=webp&s=1a682c766012a55e2c6a8089b8ae18c932951505 May 14, QuarkChain, together with Harmoney and Thendercore held an event about sharding blockchain technology. ETH 2.0, Kadena, Near Protocol, Zilliqa, and Ontology also presented during this event. We had two panels which focused on sharing updates on the progress of each project. The first panel was Deep Dive into Sharding Technology — Each project’s different approach and progress on sharding and what is to come in 2019. The second panel was Real World and Sharding — Each project’s progress on how to use sharded blockchains to make an impact outside of Cryptosphere. Anthurine, CMO of QuarkChain and Junjia, QuarkChain engineers detailed introduced QuarkChain’s state sharding technology, and a system structure of root chain-shards which can be compatible with various consensus mechanisms. On the basis of high throughput, more than 51% hash power will be protected by root chain, and compatible with decentralized PoW, PoS, and other consensus mechanisms. It puts forward an excellent solution to blockchain trilemma, which is an important contribution to the future development of the industry.
Upcoming Event
Blockchain Week in Hangzhou This is the first Blockchain Week in Hangzhou. There are three main schedules, namely, ChainNode Technology Open Day on May 16 (morning session) and Friends in Blockchain (afternoon session). Both of them are small-scale but high-end gatherings, with the highest number of entrants at 300. May 17 will be the peak conference of the Global Blockchain (Hangzhou) in 2019. It is expected that the number of participants will reach 1500.
Development Update (February): token and staking system updates, new Golang client, and more.
Hello again, /ParadigmFoundation! Thanks for reading this (slightly-delayed) February development update. It was another busy month at Paradigm, and we're excited to tell you about what has changed since the last update. As always, feel free to comment and ask questions here, or on our chat server. For an in-depth view of protocol progress, and to be the first to see new updates, be sure to follow the activity on our GitHub. Much of our monthly progress doesn't make it into these updates.
Highlights
Contract system updated and deployed (again)
Preparing ParadigmCore (TypeScript) for new version
New ParadigmCore JSONRPC/WebSocket API
OrderStream-SRA updated for new ParadigmCore API
Announcing work on the reference implementation of ParadigmCore
Latest protocol core contract system version deployed (on Ropsten)
February was a big month for the internalParadigmContracts that make up the Ethereum component of the Paradigm protocol. The latest development version of the system was deployed with a new token and set of staking systems built around DIGM: the native ERC-20 token for the Paradigm protocol. Included in the latest deployment is the ValidatorRegistry contract, a custom token-curated registry (TCR) that is used to select the validators of the OrderStream network. It allows DIGM holders to vote to select new and curate existing network validators. The registry features simple economic mechanisms to encourage the curation of a high-quality validator set. There are many exciting features included in this latest deployment, and many more coming in the following weeks. So stay tuned, and check out the source for the latest updates. Shoot me a message with your Ropsten address for some testnet DIGM if you want to play around with the system (make sure to be on the ropsten network when interacting with the functions at that link).
Preparing for ParadigmCore v0.8
In the last update, we mentioned ParadigmCore v0.8 which will be the first version of the application to support dynamic updates to the active Tendermint validator set based on the ValidatorRegistry Ethereum contract (see above). This version also includes the new JSONRPC/WebSocket API (see below), and additional enhancements. Development on version 0.8 is currently taking place here, and undergoing final revisions and testing before being merged and marked as a release version. The OrderStream current test-network deployment is running the latest v0.8 release candidate of ParadigmCore, and is being load-tested for the next few days.
About ParadigmCore's new JSONRPC/WebSocket API
Click here to see the latest documentation for the API discussed in this section, and here for the documentation of the actual server implementation. In the last update (linked above) we also discussed the new JSONRPC WebSocket API being designed and built for ParadigmCore. JSONRPC (2.0) is a simple remote procedural call (RPC) standard that provides a common format for API requests and response that can be implemented in any language over any transport. The first version of ParadigmCore's JSONRPC API is affectionately called the StreamAPI, and is available solely over a WebSocket connection (thus JSONRPC/WebSocket). It provides methods for real-time subscriptions to various "events" on the OrderStream, such as new blocks and new orders. The initial implementation also provides more conventional "request/response" methods for performing state queries to local nodes, and submitting orders to the network. The polling methods (like state.query) will eventually be made available via JSONRPC/HTTP with POST requests, and URI/HTTP to support GET requests. Check out the (WIP) documentation for the API here, or the initial StreamAPI server implementation here.
0x OrderStream-SRA (and Zaidan) updated for new JSONRPC API
OrderStream-SRA has been patched to work with the latest ParadigmCore API (see above). The hosted version of the software found at sra.zaidan.io/v2/ has been updated as well. Our hosted version of 0x Instant continues to allow access to the OrderStream testnet's aggregated 0x liquidity, and the Instant interface. For those unfamiliar, OrderStream-SRA is Paradigm's implementation of the HTTP 0x Standard Relayer API (SRA) for the OrderStream network. It allows access to the 0x order messages relayed on the OrderStream in their native format over the SRA compliant interface. It was built to 1) enable access to the OrderStream via 0x SRA 2) to support 0x instant 3) demonstrate the architectural model of "derived" order books being constructed a layer above the OrderStream relay network itself. The software currently uses a MongoDB backend, and includes instructions and configuration for use with Docker. A live version of the software is hosted at https://sra.zaidan.io/v2/, and documentation for the HTTP 0x SRA can be found here. Contributions welcome.
Announcing work on Golang reference implementation of the OrderStream
We're excited to announce that work has begun on a Golang client implementation for the OrderStream network, which will serve as the reference implementation of the Paradigm protocol, along with the contract system described above. It is likely the ParadigmCore name will be given to the Golang client in the future, so to avoid confusion the current OrderStream implementation will be called TS-ParadigmCore in the next development update. For the initial Go implementation of ParadigmCore, we will not seek cross-client compatibility with the TypeScript version. Instead, we are working on a full specification of the V1 Paradigm protocol which the Go client will be built to meet. Once complete, the TypeScript implementation will be updated to meet the new protocol specification. Eventually, the goal is to have two OrderStream client implementations that can function on and support the same network. The primary barrier to this being possible in the current implementation is the lack of a clearly specified Merkle tree structure for storing state data, and poorly specified transaction serialization. The upcoming re-specification will guide future implementers, and ensure cross-client compatibility is possible.
Important notice
The OrderStream network is in a test-net phase, and should be treated as beta software. However, there are current main-net (fillable, valid, and collateralized) 0x orders being processed and relayed by the OrderStream test-network. This means you can execute main-net 0x orders as a taker, using the OS network's maker liquidity. So while all Paradigm protocol contracts exist solely on the Ropsten test-network, some (or many/all) orders being process on the relay network are executable on the Ethereum main-net, with real assets. Please use all software discussed in this post at your own discretion, and in compliance with local regulations. Thanks for reading, and be sure to stay tuned for more development and research updates. Henry Harder CTO, Paradigm Labs [email protected] For more updates like this, follow us on Reddit, Twitter, Medium, and join our community chat server. All code and software discussed in this post can be viewed on our GitHub.
How tio connect Ethereum Wallet to Parity Node 2.x
I am running a full node parity which is always syncing, and want to connect the official Ethereum GUI wallet it to it, but have not been able to get it working. I have tried RPC over http://localhost port 8545 . I am on Windows and have heard there is an IPC pipe method but am not sure how to do in Windows. I would prefer a secure method over https or pipes. Both are latest versions- command for wallet: "Ethereum Wallet.exe" --rpc http://localhost:8545 command for parity: parity.exe --mode=active --jsonrpc-apis=all error I see when wallet trys to connect to parity is "subscriptions are not available on this transport" ...Any help is appreciated.
I'm trying to deploy a contract using Truffle and Metamask, but I keep getting this error:
Error: Error: Error: [ethjs-rpc] rpc error with payload {"id":4935577550328,"jsonrpc":"2.0","params":["0xf8d78085012a05f2008256cc8080b884d69e1e2d000000000000000000000000f17f52151ebef6c7334fad080c5704d77216b732000000000000000000000000000000000000000000000000000000000000001673647364000000000000000000000000000000000000000000000000000000007364736400000000000000000000000000000000000000000000000000000000822d46a0a06fb20f486030c26879b18e6bb40a5bf28e1e4a6588ebd5eb6b834e520da624a003c8b5c698af2e6478278c2614b6e7e00b0fe61ccf971b6f2cc29e7c327458be"],"method":"eth_sendRawTransaction"} Error: base fee exceeds gas limit
Carry out the resource loading and destruction and inclusion test
Complete the rpc mechanism of the controller to the model instance
Split the server joint pressure
Complete the table adaptive universal components
Complete the interface establishment of city information
Complete the function details adjustment of the raw material plant and the processing plant
Complete the client UI logic and inter-face construction of retail store module
Complete the UI interface of the com-pany information
Complete the function of specially writing for retail store
Complete the common component rewriting of the line chart
Optimize the packaged exchange function
Complete the homepage of the research institute and homepage and server joint
Complete the structural adjustment of the research institute
Complete the product interface of research institution and logic processing
Complete the function of research line and invention line
Complete the function of the inventive material and inventive product
Optimize the interface of CreatePanel for lua universal asynchronous load resource
Optimize UnitTest.Exec to satisfy the controllable requirements of the test case sequence
Complete the Icon resource limit test and extend the topic for resource loading IO and memory stress testing
Complete the RPC mechanism of Model and Control to achieve the effect of reflection and remotely call the corresponding Model / Ctrl method in Ctrl / Model
Complete the use of RPC mechanism to rewrite the residential interface to optimize the same type of building and multi-Model mechanism at the same time
Complete the fog of war
Complete the fog of war scalable range and real-time refresh size to conveniently achieve the construction black screen effect when opening the UI
Complete the player operation script PC / Mobile platform differentiation
Complete the optional synthetic inter-face of the research institution
Optimize the latest framework for residential matching
Optimize the information update pro-cessing of the research invention line
Optimize the modification number of employees
Complete the addition and deletion function of research invention line
Complete all UI logic of the research institute
Complete the client UI logic of retail store module
Complete the specific functions of the retail store
Complete the retail store network joint debugging
Complete the city information jump interface for level I and jump function
Complete the city information jump interface for level II and jump function
Complete the configuration table of the city information form
Complete the UI logic of system sett-ings
Complete the configured multi-language temporary table.
Complete multi-language function localization
Complete the park entry module
Complete the friend system UI setup (friend management, group management, application list)
Complete friend system UI resource replacement
Complete the friend system server joint debugging (find, add, apply, operate, delete friends, remove blacklist shielding)
Complete the Icon resource limit test
Complete the refactoring resource packaging and loading process to prepare for hot fix
Complete the integrated performance optimization of the client
Complete the road system generation algorithm
Complete the road system version 1.0 and access road resources.
Complete the camera script realization (distinguish the gesture zoom/ drag/click and respond accordingly)
Complete the AI of residential entrance
The exchange clears all fake data
Complete all logic process of the research institution for the client
Complete the model code reconstruction
Complete the notification server joint debugging
Complete the city information configu-ration table
Complete the friend interface joint debugging and fix bugs
Complete the chat system UI setup
Complete the chat system UI resource replacement
Complete the retail store warehouse joint adjustment
Complete the retail store shelf joint adjustment
Complete the retail store transportation joint adjustment
Complete the UI design and function process for the retail store to access park advertisement
Complete the modification of the previous data store and replace Ctrl with the Modle data storage
Complete the reconstruction of the technology transaction code
Complete the park code reconstruction
Complete camera Lua transplantation
Complete the function of dragging and constructing objects
Finish clicking on the building special effect lens zoom
Complete the replacement of building resources 2.0
Complete the architectural planning configuration table updating
Complete the bubble system reserved interface function logic
Complete the research server joint debugging
Complete the adjustment function logic of the number of employees of the research institute.
Complete other details of the research institution and bug fixes
Complete the UI logic of the land transaction part
Complete the model code recon-struction
Optimize the login process function
Complete UI logic of the talent center
Complete the central warehouse selection transportation address logic
Complete the scrolling logic of the main interface world chat message
Complete the function of the world chat
Complete the stranger information display function
Complete the stranger add function
Complete the stranger private chat function
Complete the stranger chat function
Complete the add friend function
Complete the friend block function
Complete the common function of multiple interface red spot notification
Complete the retail store shelves and purchase goods function
Complete the UI design and function of retail store access park advertising module
Optimize retail store transportation system
Complete the specific operation process and function of the retail store
Optimize and re-adjust the production line related agreements
Complete the game guide book UI logic
Complete the game guide book client logic
Complete the game guide book tem-porary configuration table
Complete the 30-frame stress test for AOI building resource stability
EthDcrMiner64.exe -epool eth-eu1.nanopool.org:9999 -ewal myetheraddresshere.minernamehere/[email protected] -epsw x -mode 1 -ftime 10 Everything worked fine for months and then I started getting the "socket was closed remotely" message 3 days ago. I checked the log and see the following errors
Android browser for Ethereum, a possible approach.
This is a (proof of concept) android ethereum/web3 browser, like Parity/mist but for android, it's attached to a JSONRPC node from Infura. This is the GitHub Repo, feel free to take a look, judge the approach. This is the pre-alpha android app (3mb). Although it does give up the independence of running your own node, this approach was chosen for its relative small size and easy on the data approach. If you're a developer:
What do you think of the approach? Its just providing a provider for dapps through JS.
Is there a better way
Please suggests tests that can be implemented for security and stability
To exchange tokens, users send value to a special address (which indicates the type of token they would like to receive back) and the exchanged value will be sent back to them at the address they sent the original tokens from. This user experience is implemented by fulfilling the exchange using hot wallets, and then later mirroring the trade (at a hopefully equivalent rate) on an exchange, and periodically re-balancing the exchange/hot wallets. Ethershift takes a cut of profit (half of it in the form of the input token, half of it in the form of the output token) to account for the risk of the exchange rate changing. Third-parties are able to integrate Ethershift into their own systems and receive a 50% cut of the profit via the Ethershift API. The back-end service is an application written in Node JS, running on Amazon EC2. To access the Ethereum network, a full node is installed on the server, and the back-end service communicates with it through its JSONRPC API. The service uses an SQL database to keep track of profits. https://ethershift.co/ https://preview.redd.it/go8sqww2y2321.jpg?width=1080&format=pjpg&auto=webp&s=52d1606d26678ed99c6ebab6d71f8ffbf61c051c
DEPRECATED! Java implementation of the Ethereum yellowpaper. For JSON-RPC and other client features check Ethereum Harmony - Ethereum-eternity/ethereumj We would like to show you a description here but the site won’t allow us. The JSON-RPC format expects eth_call to have a specific data field format that requires normalizing the contract function balanceOf to a short Function Selector. To do this, we take out the names and the type of inputs it takes, and take that as a string. We then run it through Ethereum’s sha3 keccak hash: 外部からGethにアクセスするために必要なJSON RPCについて書いていきます。 Category About Ethereum(Geth)でJSON RPCを使って外部からアクセスする Geth. 公開: 2018-01-28. 更新: 2020-04-29. こんにちは、いつもお読みいただきありがとうございます。 ... Ethereum JSON RPC Overview. JSON is a lightweight data-interchange format. It can represent numbers, strings, ordered sequences of values, and collections of name/value pairs. JSON-RPC is a stateless, light-weight remote procedure call (RPC) protocol. Primarily this specification defines several data structures and the rules around their ...
Create Ethereum Private Blockchain in less than 30 minutes! - Duration: 19:52. End to End Machine Learning 1,406 views. 19:52. Курс по разработке приложений на популярной блокчейн платформе Ethereum. Ethereum in Depth: How is Ethereum Structured? - Connecting to Ethereum from your own app - Duration: 22:39. Kevin Healy Recommended for you Geth is the Go implementation of the Ethereum protocol. This tutorial demonstrates 4 ways to communicate with Geth: - Console mode using the JavaScript Runtime Environment - Script mode using the ... Bitcoin JSON-RPC tutorial. How to set up and use bitcoind wallet notify feature. ... Ethereum 2.0 News, ETH Price Prediction & ETH Airdrop with Vitalik Buterin Ethereum Foundation 이더 리움 ...
