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Blockchain platform selection
Publish: 2021-05-01 04:31:53
1. In many cases of blockchain commercial application, we can always see the word baas. Baas is the abbreviation of blockchain as a service, which is translated into "blockchain as a service" in Chinese. So what is blockchain as a service baas? With this question, we will follow Xiao Wang of Renren blockchain technology team to discuss it carefully
according to Xiao Wang, the concept of blockchain as a service (baas) is mainly proposed by Microsoft and IBM. To put it bluntly, it is actually a new type of cloud service, a cloud service combined with blockchain technology. For example, Microsoft's azure cloud computing platform and IBM's bluemix garage cloud platform all provide blockchain as a service baas
blockchain as a service (baas) is a space created by enterprises such as Microsoft and IBM from their own cloud service network to run a blockchain node. Compared with ordinary nodes and exchange nodes, the main purpose of baas nodes is to quickly establish the development environment they need, and provide a series of operation services based on blockchain, such as search query, transaction submission, data analysis, etc. these services can be centralized or decentralized to help developers verify their concepts and models faster. The service of baas node is reflected in: it is more instrumental and easy to create, deploy, run and monitor blockchain.
according to Xiao Wang, the concept of blockchain as a service (baas) is mainly proposed by Microsoft and IBM. To put it bluntly, it is actually a new type of cloud service, a cloud service combined with blockchain technology. For example, Microsoft's azure cloud computing platform and IBM's bluemix garage cloud platform all provide blockchain as a service baas
blockchain as a service (baas) is a space created by enterprises such as Microsoft and IBM from their own cloud service network to run a blockchain node. Compared with ordinary nodes and exchange nodes, the main purpose of baas nodes is to quickly establish the development environment they need, and provide a series of operation services based on blockchain, such as search query, transaction submission, data analysis, etc. these services can be centralized or decentralized to help developers verify their concepts and models faster. The service of baas node is reflected in: it is more instrumental and easy to create, deploy, run and monitor blockchain.
2. If it's me, I'll choose ash and only do the application layer. Of course, the easier I get to know, the better
3. The first and second skill costs are: 100, 500, 1000, 1500...... 15000; Total 232600 * 2 = 465200
the third skill is: 10000, 10500...... 15000; Total 137500
that is to say, a hero with 32 skill points full needs 602700 gold coins
5 heroes need more than 3 million gold coins!!! This is not the fawn, but also the skill of adding blood
apart from some less important skills, a 20% discount is indispensable for 2.4 million gold coins! Similarly, to level 50, single hero full level to 1742700 gold
(so it's better not to add some heroes' skills in the early stage, such as the fawn only increases, and the Lich does not add 3 when it's full)
after calculating the expenses, let's talk about the income. The main source of the gold coin income of the legend of the turret is the burning expedition. The second channel is the crypt search starting from level 42. There is also a very important channel, the mercenary of the trade union< In fact, it's not difficult for us to complete the skills of the main heroes as soon as possible. We can do it step by step in a few days:
1
don't raise all the heroes, increase the unnecessary expenses and take a detour. As for the choice of heroes, it depends on the resources you have. Just ask the old birds and gods in forums and guilds
2. Give priority to the injury skills, and the auxiliary skills should be filled up at one time
select the hero and start training. At the beginning stage, you should focus on the damage skills, put aside the auxiliary skills for the time being, and fill them up when you have money in a few days. Otherwise, you will not be able to control the damage and the expedition will not even have the conditions for home
3
don't rush forward in the early stage. If you rank too high, the expedition will be too difficult
4. Set up a stable mercenary
when you enter the trade union, remember:
make sure that a hero stays in the trade union for a long time (it's better to be a high-level hero who is not commonly used, and the powerful hero should be used to guard the mine as much as possible), because the longer the time is, the greater the reward will be. Frequent replacement will lead to the loss of gold coins. Of course, if you have a dead horse to start with, you can earn a gold coin in the early stage of the union
5. Multi point mining and key protection
wait until level 42 can mine. Congratulations, you can have a daily surplus. Feed all heroes to level 35. Don't waste your equipment and upgrade to level 35. Then occupy as many mines as possible (if you spend more than 10000 gold, you should be careful. No, don't search any more). In this way, you can guarantee to occupy more than 2 gold mines. If it goes well, it will bring hundreds of thousands of gold coins a day.
the third skill is: 10000, 10500...... 15000; Total 137500
that is to say, a hero with 32 skill points full needs 602700 gold coins
5 heroes need more than 3 million gold coins!!! This is not the fawn, but also the skill of adding blood
apart from some less important skills, a 20% discount is indispensable for 2.4 million gold coins! Similarly, to level 50, single hero full level to 1742700 gold
(so it's better not to add some heroes' skills in the early stage, such as the fawn only increases, and the Lich does not add 3 when it's full)
after calculating the expenses, let's talk about the income. The main source of the gold coin income of the legend of the turret is the burning expedition. The second channel is the crypt search starting from level 42. There is also a very important channel, the mercenary of the trade union< In fact, it's not difficult for us to complete the skills of the main heroes as soon as possible. We can do it step by step in a few days:
1
don't raise all the heroes, increase the unnecessary expenses and take a detour. As for the choice of heroes, it depends on the resources you have. Just ask the old birds and gods in forums and guilds
2. Give priority to the injury skills, and the auxiliary skills should be filled up at one time
select the hero and start training. At the beginning stage, you should focus on the damage skills, put aside the auxiliary skills for the time being, and fill them up when you have money in a few days. Otherwise, you will not be able to control the damage and the expedition will not even have the conditions for home
3
don't rush forward in the early stage. If you rank too high, the expedition will be too difficult
4. Set up a stable mercenary
when you enter the trade union, remember:
make sure that a hero stays in the trade union for a long time (it's better to be a high-level hero who is not commonly used, and the powerful hero should be used to guard the mine as much as possible), because the longer the time is, the greater the reward will be. Frequent replacement will lead to the loss of gold coins. Of course, if you have a dead horse to start with, you can earn a gold coin in the early stage of the union
5. Multi point mining and key protection
wait until level 42 can mine. Congratulations, you can have a daily surplus. Feed all heroes to level 35. Don't waste your equipment and upgrade to level 35. Then occupy as many mines as possible (if you spend more than 10000 gold, you should be careful. No, don't search any more). In this way, you can guarantee to occupy more than 2 gold mines. If it goes well, it will bring hundreds of thousands of gold coins a day.
4. Tools to prepare: makecert.exe, cert2spc.exe, pvk2pfx.exe, signtool.exe
there is a certificate generation tool makecert.exe in MS sdk6.0. You can use this tool to generate test certificates
in the first step, a self signed root certificate (issuer) is generated< br />> makecert -n " CN=Root" - R - SV rootissuer.pvk rootissuer.cer
at this time, a prompt box will pop up. First, set the private key protection password for the rootissuer.pvk file
then, enter the password again and use the private key (in the rootissuer.pvk file) to encrypt the public key (in the rootissuer.cer file)
the second step is to use this certificate to issue a sub Certificate (subject)< br />> makecert -n " CN=Child" - IV rootissuer.pvk - IC rootissuer.cer - SV childsubject.pvk childsubject.cer
in this case, a prompt box will pop up to set the protection password for the private key file childsubject.pvk of this sub certificate
then, enter the password of the private key (in childsubject. PVK) of the sub certificate to protect the public key of the sub Certificate (in childsubject. CER)
next, you will be prompted to enter the password of the private key of the root certificate (in rootissuer. PVK) to sign the whole sub Certificate (public key and user information)
if you want to issue more sub certificates, similarly, you can use this certificate to issue further certificates, provided that the childsubject certificate can also be used for issuing (as an issuer)
remarks:
(1) if you need an interactive certificate for secure communication, add the option sky exchange
(2) if you need a signing certificate to sign certificates or binary files, then add the option sky signature.
(3) if you need a client certificate to mark your identity or personal information protection (e-mail), then the E field in option - n is indispensable
examples: - N & quot; CN = company name, e = e-mail address, o = organization name, Ou = organization unit, C = country, s = province (state), P = County & quot< Other auxiliary tools:
1) public key certificate format is converted to SPC. cert2spc.exe
> Cert2spc testroot. Cer testroot. SPC
. SPC means software publisher certificate.
2) combines the public key certificate and the private key into a PFX format certificate file. pvk2pfx.exe
> Pvk2pfx - PVK testroot.pvk - SPC testroot.spc - PFX testroot.pfx
enter the protection password of testroot.pvk to merge. PVK and. SPC files. If you do not set the protection password of testroot.pfx to be merged, the protection password is the same as that of the input file testroot.pvk Note: it's OK to get the CER file directly, but it's not necessary to get the SPC file).
3) signature tool. Signature.exe
binary file digital signature. In order to ensure the integrity of binary file, digital signature is a good method
the following command starts a file signing tool wizard with graphical interface:
& gt; Signtool wizard
the following is the command line signature:
& gt; signtool sign /f " Full path of PFX file & quot/ p " Protection password of PFX file & quot/ t " http://timestamp.verisign.com/scripts/timstamp.dll" / d " Description of this signature & quot& quot; The whole path of the signed program & quot;
there is a certificate generation tool makecert.exe in MS sdk6.0. You can use this tool to generate test certificates
in the first step, a self signed root certificate (issuer) is generated< br />> makecert -n " CN=Root" - R - SV rootissuer.pvk rootissuer.cer
at this time, a prompt box will pop up. First, set the private key protection password for the rootissuer.pvk file
then, enter the password again and use the private key (in the rootissuer.pvk file) to encrypt the public key (in the rootissuer.cer file)
the second step is to use this certificate to issue a sub Certificate (subject)< br />> makecert -n " CN=Child" - IV rootissuer.pvk - IC rootissuer.cer - SV childsubject.pvk childsubject.cer
in this case, a prompt box will pop up to set the protection password for the private key file childsubject.pvk of this sub certificate
then, enter the password of the private key (in childsubject. PVK) of the sub certificate to protect the public key of the sub Certificate (in childsubject. CER)
next, you will be prompted to enter the password of the private key of the root certificate (in rootissuer. PVK) to sign the whole sub Certificate (public key and user information)
if you want to issue more sub certificates, similarly, you can use this certificate to issue further certificates, provided that the childsubject certificate can also be used for issuing (as an issuer)
remarks:
(1) if you need an interactive certificate for secure communication, add the option sky exchange
(2) if you need a signing certificate to sign certificates or binary files, then add the option sky signature.
(3) if you need a client certificate to mark your identity or personal information protection (e-mail), then the E field in option - n is indispensable
examples: - N & quot; CN = company name, e = e-mail address, o = organization name, Ou = organization unit, C = country, s = province (state), P = County & quot< Other auxiliary tools:
1) public key certificate format is converted to SPC. cert2spc.exe
> Cert2spc testroot. Cer testroot. SPC
. SPC means software publisher certificate.
2) combines the public key certificate and the private key into a PFX format certificate file. pvk2pfx.exe
> Pvk2pfx - PVK testroot.pvk - SPC testroot.spc - PFX testroot.pfx
enter the protection password of testroot.pvk to merge. PVK and. SPC files. If you do not set the protection password of testroot.pfx to be merged, the protection password is the same as that of the input file testroot.pvk Note: it's OK to get the CER file directly, but it's not necessary to get the SPC file).
3) signature tool. Signature.exe
binary file digital signature. In order to ensure the integrity of binary file, digital signature is a good method
the following command starts a file signing tool wizard with graphical interface:
& gt; Signtool wizard
the following is the command line signature:
& gt; signtool sign /f " Full path of PFX file & quot/ p " Protection password of PFX file & quot/ t " http://timestamp.verisign.com/scripts/timstamp.dll" / d " Description of this signature & quot& quot; The whole path of the signed program & quot;
5. It's almost the same. The only thing we need is a good risk assessment.
6. I don't know what kind of platform it refers to? If you want to understand the blockchain, you can learn the relevant information on the blockchain media platform. Password, gold, Babbitt and so on are all good.
7. Come to blockchain news Internet bar! Now many friends who pay attention to blockchain economy are paying attention to it. It can provide market information of digital currency procts such as digital currency, blockchain and bitcoin, which is convenient for users to compare and choose. For users, it is not only simple to operate, but also authoritative and reliable.. I'm glad you've accepted my answer
8. The blockchain of hand in hand platform is relatively stable!
9. Guangzhou help! OK, relatively stable!
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