EOS will end crowdfunding at 7 a.m. Beijing time on June 2, 2018, and the deadline for mapping is 6 a.m. on June 3. After that, all EOS tokens based on Ethereum erc20 will be frozen and cannot be transferred. After the EOS main network goes online, the network will be started through this snapshot.
It can be seen from the crowdfunding contract of EOS that the register function is used to map the public key of EOS main network and supports an EOS address within 64 bits. The main function of mapping is to convert your erc20 token into the rights and interests on the EOS public key address.// Value should be a public key. Read full key import policy.
// Manually registering requires a base58
// encoded using the STEEM, BTS, or EOS public key format.
function register(string key) {
assert(today() <= numberOfDays + 1);
assert(bytes(key). length <= 64);
keys[msg.sender] = key;
LogRegister(msg.sender, key);
}
// Crowdsale owners can collect ETH any number of times
function collect() auth {
assert(today() > 0); // Prevent recycling during window 0
exec(msg.sender, this.balance);
LogCollect(this.balance);
}
// Anyone can freeze the token 1 day after the sale ends
function freeze() {
assert(today() > numberOfDays + 1);
EOS. stop();
LogFreeze();
}
Advantages and disadvantages of exchange and wallet mapping:
We now see that many exchanges have supported EOS mapping, which has advantages and disadvantages. For Xiaobai users, it is a good choice to put them in the exchange. First, avoid the risk of private key leakage during mapping. Second, even if erc20 token is frozen after June, you can still trade shares (sugar sharing rights) through the exchange
However, for experienced players, the characteristic of blockchain is that only those who have private keys can have account control. Unlike bitcoin bifurcation, the private key of the EOS main network cannot be transferred from the exchange to the user. Your erc20 token will eventually bind only one EOS main network address. If you have no control over the private key of this address, the sugar sharing right in the future will not be in your hands. Now, many projects based on EOS will send candy to token holders, but the exchange will not put all candy on the shelves, which is a potential loss. At the same time, owning the private key can also exercise the voting right on the EOS master node and participate in community governance
Note: this tutorial is based on the official standard process of chrome + metamask. Please ensure your computer system security and turn on the firewall. This tutorial is not responsible for the leakage of private key caused by network security. The tutorial needs scientific Internet access. Please provide your own VPN and turn on the global mode
Preparation in advance:
1. Turn on the global scientific Internet and install metamask
Visit metamask IO official website
Get Chrome extension to enter the plug-in installation page
Install plug-ins
2. Close all chrome plug-ins except metamask, and enter in the browser chrome://extensions/ Close
3. Import the private key through metamask or create an Ethernet address (remember to save the private key). This address needs at least 0.005 eth to operate the mapping function. This address does not need to be stored in any EOS before token is frozen, so it is relatively safe. If metamask has been installed, you need to select the primary account to be mapped (checked)
Formal steps:
1. Access the EOS official website globally IO, the second confirmation did not enter the phishing website
2. In the middle and lower part of the official website, find and click Get EOS to enter the user terms interface
3. Agree to the terms, check all five checkmarks, and then continue
4. Enter the participation instructions in the middle of the page to prepare the contract interaction
5. Click Register to view the mapping English guide, which introduces the freezing time of token and the necessity of mapping
6. Select EOS token distribution below to enter the mapping Đ App interface
7. Enter the contract main interface, you can see your own Ethernet address and mapping (no EOS key registered), and the mapped address will display EOS public key
Make sure that the private key of eos-private is secure, and then click the eos-private key to close it before the operation
9. Enter the private key in the confirm private key column to check, open Wi-Fi, and click I have safe backed up my private key
10. In the pop-up metamask interface, the gas limit is set to 100000, and gas price can be flexibly selected according to the network situation. In the near future, 1 Gwei can be used to package the transaction within a few minutes, and then click submit to send the transaction uplink
11. Wait a moment. After the transaction is packaged, the EOS mapping has been completed, and your own EOS public key address can be seen in the main interface of the contract. To change the EOS public key, select change your EOS key, and then go back to step 8 to remap
Verify that the EOS public key matches the private key:
For accounts that have been mapped through imtoken, myetherwallet or other methods, if you are not confident about the accuracy of the private key, you can also verify the private key through the official website to check whether the mapped public and private keys of the EOS main network match
1. First enter the main interface of EOS token distribution in step 7, open chrome console: view → developer → developer tool (this step can close Wi-Fi offline operation), then enter the following code and press enter
function verify_ private_ key(_key) { var d = eos_ecc.PrivateKey.fromWif(_key); return d.toPublic().toString()}
2. Enter the following code in the console, replace the text between single quotation marks with your EOS private key and press enter. Then you can verify whether your EOS public key matches the private key
verify_ private_ key('Your EOS Private Key Here')
It is less than 2 months before the end of EOS crowdfunding. Please hurry up and map. Before June 1, the mapping does not affect the transaction of EOS token, nor does it determine the snapshot based on the number of EOS in the Ethernet address during the mapping operation, but only the number in the account after token is frozen on June 3. So before June 1, just fill the EOS into this Ethernet address.
Lao Bai, the author of this article, is the CEO of prochain (Prajna), a blockchain big data advertising platform. The team began to participate in the first phase of EOS crowdfunding. Prochain team is committed to building a transparent digital advertising data ecological platform. With the high concurrency of EOS, free users and other excellent features, we can realize the transparency of advertising data, achieve mutual trust among various roles of digital advertising at the lowest cost, and solve the pain points of digital advertising industry: settlement delay, data island, traffic fraud, data black box, user shielding and so on, so as to achieve win-win results.
Brendan Blumer, CEO of prochain White & EOS
Prochain team will distribute no less than 20% of the total amount of new PRA candy to EOS holders after the EOS main chain is launched. At the same time, it will conduct snapshot mapping for PRA token holders and distribute the new PRA on EOS main chain in equal proportion. The detailed rules will be gradually released later. We hope that more friends who agree with our ideas will join us to build the first blockchain advertising ecology on EOS!
