OYchain is a high-performance and decentralized public chain built by OY’ and KuCoin’s fan communities.
Developed based on go-ethereum with the purpose of providing community users with a higher-speed, convenient and low-cost blockchain user experience.
OYchain will have the following characteristics:
- Fully compatible with Ethereum and ERC-20 smart contracts, with extremely low migration costs;
- OY will serve as the only core fuel and native token for OYchain and can be used in scenarios such as gas fee payment;
- A block every 3 seconds results in faster transaction confirmation and higher chain performance;
- Proof of Staked Authority (PoSA) consensus algorithm, high efficiency, security and stability.
Mission: To accelerate the flow of value around the world without boundaries.
- OYchain officially will not release any Swap project because all projects are developed by the community.So OYchain is not responsible for any inconvenience caused by these projects. Also, OYchain does not serve as customer service for relevant projects.
- Before any operations in the fields related to cryptocurrency or DeFi, please first do your own research.
- All users and developers can build the dApp in OYchain testnet then the mainnet in the follow-up for free.
- Please distinguish the test environment (the testnet) from the main network environment (the mainnet). The assets generated in the test environment do not have value, so please be careful against the cryptocurrency fraud.
- OYchain will announce authorization, promotion and other cooperation through its official social network, please kindly check the official information and avoid phishing sites.
- Please make sure that you are visiting the official website to avoid the loss of private key.
Dear user (hereinafter referred to as "you"):
OYchain (hereinafter referred to as "OYchain" or "we") is a decentralized public chain. Developers around the world can deploy applications on OYchain, all users can read, send and trade on OYchain. Due to the characteristics of decentralization, we hereby remind you the risks of the third-party DAPP are as follows:
- Before you operate on any platform, wallet or third-party DAPP, please do your own research first;
- Whether you participate in or use DAPP on OYchain through any trading platform or wallet, it is your own behavior and we do not recommend it to you;
- We are not responsible for auditing any third-party DAPP, nor do we make any commitment and guarantee on the validity, accuracy, correctness, reliability, quality, stability, integrity and timeliness of the technology and information involved in its services;
- You should bear all the responsibilities arising from your use of any third-party DAPP services on your own;
- Whether the third-party DAPP services meet the laws, regulations or relevant policies of your jurisdiction, please make your own judgment and evaluation. We do not provide any evaluation, please make sure that you strictly abide by the laws of your jurisdiction;
- You and the third-party DAPP shall assume the responsibilities of any issues related to the usage of the third-party DAPP, including but not limited to legal issues, contractual liability issues, economic losses, etc., OYchain will not be responsible for them;
- Unless you authorize us to do so, OYchain will not share your personal information with any third-party DAPP. If you authorize us to share the information, all legal liabilities and disputes arising from the access by the third-party DAPP to your personal information shall be assumed by you and the third-party DAPP.
- OYchain has no right to provide you with the personal information of any third-party DAPP developers unless they agree to do so. We will assist in this issue however we cannot guarantee that the information can be obtained.
Finally, we need to reiterate that we do not recommend or ask you to use any third-party DAPP service.
Community users can use any Ethereum compatible wallet to configure with OYchain network params, like metamask, myetherwallet, imtoken, TokenPocket etc.
Chain Name: In develop
Chain ID:
Symbol:
RPC URL:
Explorer
WebSocket RPC
The rate limit of the endpoint on Testnet and Mainnet is 300/10s
Users can use also https://scan.cntop3.com as Block Explorer.
Chain Name: OYchain-TESTNET
Chain ID: 126
Symbol: OY
RPC URL: https://rpc.cntop3.com
Explorer URL: https://scan.cntop3.com
WebSocket RPC URL: wss://ws.cntop3.com
Faucet URL: https://faucet.cntop3.com (for test only, no value)
You can directly visithttps://github.com/NFT-mall/oychain/releases to download the latest version of the binary file。
Or you can visit https://hub.docker.com/r/kucoincommunitychain/oychain to rapid deployment and testing。(How to use Docker？)
- Linux or Mac
- golang >= 1.13
- git
how to download and install golang
git clone -b oychain --single-branch https://github.com/NFT-mall/oychain.git
cd oychain
make geth
The command line flags are similar to go-ethereum, you can use ./build/bin/geth --help for all command line options,
like ./build/bin/geth --testnet to join the Testnet. Caution: Use the specific "geth" version located at ./build/bin/geth.
You can use https://hub.docker.com/r/kucoincommunitychain/oychain to fast deploy and test.
4 core cpu
8g memory
200G and scalable SSD
public ip with TCP/UDP:30303 open
./geth #Mainnet
./geth --testnet #Testnet
useful options:
/data/oychain/geth \
--datadir /data/.oychain/testnet \ #your data dir
--testnet \ #Testnet
--http \ #http rpc
--http.addr 0.0.0.0 \ #http rpc bind address
--http.vhosts * \ #vhosts
--http.corsdomain * \ #http corsdomain
--ws \ #ws rpc
--ws.addr 0.0.0.0 \ #ws rpc bind address
--syncmode full \ #syncmode
--gcmode archive #gcmode
You can use nohup,supervisor,systemd to run and manage geth in the background.
You can use the following SDKs to interact with OYchain node rpc.
- Js: web3.js Ethereum JavaScript API
- Java: web3j Web3 Java Ethereum Ðapp API
- PHP: web3.php A php interface for interacting with the Ethereum blockchain and ecosystem.
- Python: Web3.py A Python library for interacting with Ethereum, inspired by web3.js.
- Golang: go-ethereum
OYchain introduces a PoSA consensus mechanism, which features low transaction costs, low transaction delay, high transaction concurrency, and supports up to 29 validators.
PoSA is a combination of PoA and PoS. To become a validator, you need to submit a proposal first and wait for other active validators to vote on it. After more than half of them voted, you will be eligible to become a validator. Any address can stake to an address that qualifies to become a validator, and after the validator's staking volume ranks in the top 29, it will become an active validator in the next epoch.
All active validators are ordered according to predefined rules and take turns to mine blocks. If a validator fails to mine a block on time during their own round, the active validators who have not been involved in the past n/2 (n is the number of active validators) blocks will randomly perform the block-out. At least n/2+1 active validators work properly to ensure the proper operation of the blockchain.
The difficulty value of a block is 2 when the block is generated normally and 1 when the block is not generated in a predefined order. When a fork of the blockchain occurs, the blockchain selects the corresponding fork according to the cumulative maximum difficulty.
OYchain has made 3 built-in contracts for PoSA in the genesis file.
The source code of those contracts are forked from Heco, you can locate them here: https://github.com/NFT-mall/oychain-genesis-contracts。
The management of the current validators are all done by the system contracts.
- Proposal Responsible for managing access to validators and managing validator proposals and votes.
- Validators Responsible for ranking management of validators, staking and unstaking operations, distribution of block rewards, etc.
- Punish Responsible for punishing operations against active validators who are not working properly.
Blockchain call system contracts：
- At the end of each block, the Validators contract is called and the fees for all transactions in the block are distributed to active validators.
- The Punish contract is called to punish the validator when the validator is not working properly.
- At the end of each epoch, the Validators contract is called to update active validators, based on the ranking.
You can call the stake method in the validator contract to stake for any validator, the minimum staking amount for each validator is 32OY.
If you want to unstake your OY, you need to call the unstake method in the validator contract,
and wait for 86400 blocks(3 days), then call the withdrawStaking method in the validator contract to make the amount available.
Whenever a validator is found not to mine a block as predefined, the Punish contract is automatically called at the end of this block and the validator is counted. When the count reaches 24, all income of the validator is punished. When the count reaches 48, the validator is removed from the list of active validators, and the validator is disqualified.
Graph Node is a protocol for building decentralized applications (dApps) quickly on Ethereum and IPFS using GraphQL.
Example:
"auth": "graph auth https://thegraph.cntop3.com/deploy/ your-token"
"create": "graph create your-name --node https://thegraph.cntop3.com/deploy/"
"deploy": "graph deploy your-name --ipfs https://thegraph.cntop3.com/ipfs/ --node https://thegraph.cntop3.com/deploy/"
"explorer": "https://thegraph.cntop3.com/subgraphs/name/your-name"
If you need to use the service, please fill in the Application form
Due to performance issues, we recommend you follow The Graph the official document and do the privatisation deployment, and deploy your own node.
Any advice, issues and discussion are welcome.
If you have an issue on a special project, please move to the issue page in the special project.
OYchain Improvement Proposals
OYchain Improvement Proposals (OIPs) describe the standards for the OYchain platform, including Chain, DEX, and dApps.
The purpose of this process is to ensure changes to OYchain are transparent and well governed.
URL：https://github.com/NFT-mall/OIPs
1.What is the consensus mechanism of OYchain?
OYchain adopts the PoSA consensus mechanism, featuring with low cost, high performance and stable block generation, supporting up to 29 validator nodes;
2.How to become a OYchain validator node?
To become a validator, you need to create a node and submit a proposal, and wait for other active validators to vote. After receiving more than half of the votes, you are eligible to become a validator. Any address can stake the address that is eligible to become a validator. After the validator's staked amount ranks in the top 29, the validator will become an active one in the next epoch.
3.Does OYchain support EVM?
OYchain fully supports EVM and is completely friendly to Ethereum developers.
4.What SDK does OYchain use?
OYchain is highly compatible with Ethereum, so we adopt the sdk of Ethereum such as web3js, web3j, etc.
5.I want to carry out some operations and tests on the OYchain testnet. Where can I get test tokens?
You can visit our testnet faucet: https://faucet.cntop3.com.
6.How to stake contract nodes?
Users can call the stake method of the validator contract to stake any node. The minimum staked amount for each validator is 32 OY.
7.How to unlock the staked amount?
If users want to retrieve the staked OY, they need to call the unstake method of the validators contract to unlock the staked amount. After 86,400 blocks were generated (3 days), call the withdrawStaking method of the validators contract to get the staked OY back.
8.Get stuck when using MetaMask (including but not limited to transfer stuck or delay, problem of data display, etc.)
Use the plug-in expand view to display at full screen, which can be more stable or choose "Accelerate" to increase gaslimt and gasPrice.
9.How to use OYchain bridge for cross-chain asset conversion service？
You can refer to our video tutorial：https://www.youtube.com/watch?v=kZdX1V2Tgnc
For more tutorials, please subscribe to our Youtube channel：https://www.youtube.com/channel/UCZhWm40SuAApnLqqq3F9o1w
10.What happens if we used OYchain instead of ERC20 when sending Tether to an address that doesn't support OYchain? Does it bounce back after a certain amount of time?
If the target address is your personal address, the operation is quite simple. Change the wallet network to OYchain, and import your address and your OYchain-USDT contract address, then you can see the USDT balance.
If your target address is an exchange or a centralized wallet, you need to contact their customer support to either let them support OYchain or refund them to your original address.
Therefore, we suggest our users to be clear about why they will make the transfer since blockchain features immutability, meaning that any transfer cannot be rolled back once sent, and we always recommend first giving a try with a smaller amount.
Use Chrome browser open MetaMask extension site
Follow the intro, create your ETH wallet，backup your private key or mnemonic；
Config OYchain Mainnet
(1) Open MetaMask，you can see the default config of【Ethereum mainnet】
click【Ethereum mainnet】，click【custom RPC】on the drop menu
(2) Fill that config value in order change to the OYchain Testnet：
Network Name：OYchain-TestNET
New RPC URL：https://rpc.cntop3.com
Chain ID: 126
Currency Symbol (optional)：OY
Block Explorer URL (optional):https://scan.cntop3.com/en
Done
[Video]How to Unstuck Stuck Transactions on MetaMask (OYchain)
[Video]How to add a custom token to your MetaMask wallet (OYchain)