Go Implementation Of Waves Node, Libraries, tools for Waves Blockchain

gowaves

Go implementation of Waves Node, libraries and tools for Waves blockchain.

Waves Node

It is possible to run Waves Node on Linux, macOS or Windows. Please, download an appropriate binary file from Releases page.

You can either synchronize a node over network or import a downloaded blockchain file.

How to import blockchain from file

Blockchain files are available on MainNet, TestNet StageNet download pages.

Import could be done as follows:

1. Download a blockchain file
2. Download the importer utility from Releases
3. Run the command, put the path to the blockchain file and node's state directory as parameters. The third parameter is the number of blocks to import, it should be less than a desired height by one.

./importer -blockchain-path [path to blockchain file] -data-path [path to node state directory] -blocks-number [height - 1]

Import may take a few hours, after which you can run the node as described in next section.

Please note that the Go Node has its own state storage structure that is incompatible with Scala Node.

How to run the node

Run the node as follows:

1. Download a suitable node's binary file from Releases
2. Run the command, if required, put the path to the node's state directory.

./node -state-path [path to node state directory]

By default, the node is run as a MainNet node. To run a TestNet node put testnet, as a blockchain type. You may also enter a list of comma separated peers' addresses (Optional):

./node -state-path [path to node state directory] -blockchain-type testnet

How to set block generation

Go Node has two parameters which allow the loading of private keys from a wallet file.

-wallet-path [path to wallet file]
-wallet-password [password string]

For example:

./node -state-path ~/gowaves-testnet/ -blockchain-type testnet -wallet-path ~/testnet.wallet -wallet-password 'some super secret password' 

Once the parameters were provided, the node would try loading and using private keys to generate blocks.

How to create a wallet file

To create a wallet file use the wallet utility. Please download a suitable version of the wallet utility from the Releases page. The following command will add a seed to the wallet file:

./wallet add -w [path to the wallet file]

The utility would ask for a seed phrase and a password to encrypt the new wallet file. If a wallet file does not exist, the file will be created.

It is possible to provide not only a seed phrase, but also a Base58 encoded seed in a compatible with waves.exchange application format. To do so add -b flag:

./wallet add -w [path to the wallet file] -b

Enter the string of a Base58 encoded seed (It will be asked).

To list the seed, run the next command and provide the password.

./wallet show -w [path to the wallet file]

Client library examples

Create sender's public key from BASE58 string:

   sender, err := crypto.NewPublicKeyFromBase58("<your-public-key>")
   if err != nil {
       panic(err)
   }

Create sender's private key from BASE58 string:

    sk, err := crypto.NewSecretKeyFromBase58("<your-private-key>")
    if err != nil {
        panic(err)
    }

Create script's address:

    a, err := proto.NewAddressFromString("<script's address")
    if err != nil {
        panic(err)
    }

Create Function Call that will be passed to the script:

    fc := proto.FunctionCall{
        Name: "foo",
        Arguments: proto.Arguments{
            proto.IntegerArgument{
                Value: 12345,
            },
            proto.BooleanArgument{
                Value: true,
            },
        },
    }

New InvokeScript Transaction:

    tx, err := proto.NewUnsignedInvokeScriptV1('T', sender, a, fc, proto.ScriptPayments{}, waves, 500000, uint64(ts))
    if err != nil {
        panic(err)
    }

Sign the transaction with the private key:

    err = tx.Sign(sk)

Create new HTTP client to send the transaction to public TestNet nodes:

    client, err := client.NewClient(client.Options{BaseUrl: "https://testnodes.wavesnodes.com", Client: &http.Client{}})
    if err != nil {
        panic(err)
    }

Send the transaction to the network:

    _, err = client.Transactions.Broadcast(ctx, tx)
    if err != nil {
        panic(err)
    }

What's done

• Full blockchain support of Waves version 1.3
• Full support of RIDE version 5
• RIDE DApp-to-DApp invocations
• Full support of gRPC API
• Block generation
• Partial and very limited support of REST API
• Fast and optimized import of blockchain
• Fast and optimized RIDE evaluation

Known issues

• Reduced REST API, only few methods are available

Future plans

• Full support of REST API
• Extensive integration testing
• RIDE v6, MetaMask support

Building from sources

Go version 1.18 or later is required to build the node, importer, wallet and other tools.

To build a node, importer or other tools run a make command:

make release-importer
make release-node
...

Other Tools

• chaincmp - utility to compare blockchains on few nodes
• wmd - service to provide a market data for Waves DEX transactions

Download Details:
Author: wavesplatform
Source Code: https://github.com/wavesplatform/gowaves
License: MIT license

#waves  #blockchain  #smartcontract #go 

What is GEEK

Buddha Community

Go Implementation Of Waves Node, Libraries, tools for Waves Blockchain

gowaves

Go implementation of Waves Node, libraries and tools for Waves blockchain.

Waves Node

It is possible to run Waves Node on Linux, macOS or Windows. Please, download an appropriate binary file from Releases page.

You can either synchronize a node over network or import a downloaded blockchain file.

How to import blockchain from file

Blockchain files are available on MainNet, TestNet StageNet download pages.

Import could be done as follows:

1. Download a blockchain file
2. Download the importer utility from Releases
3. Run the command, put the path to the blockchain file and node's state directory as parameters. The third parameter is the number of blocks to import, it should be less than a desired height by one.

./importer -blockchain-path [path to blockchain file] -data-path [path to node state directory] -blocks-number [height - 1]

Import may take a few hours, after which you can run the node as described in next section.

Please note that the Go Node has its own state storage structure that is incompatible with Scala Node.

How to run the node

Run the node as follows:

1. Download a suitable node's binary file from Releases
2. Run the command, if required, put the path to the node's state directory.

./node -state-path [path to node state directory]

By default, the node is run as a MainNet node. To run a TestNet node put testnet, as a blockchain type. You may also enter a list of comma separated peers' addresses (Optional):

./node -state-path [path to node state directory] -blockchain-type testnet

How to set block generation

Go Node has two parameters which allow the loading of private keys from a wallet file.

-wallet-path [path to wallet file]
-wallet-password [password string]

For example:

./node -state-path ~/gowaves-testnet/ -blockchain-type testnet -wallet-path ~/testnet.wallet -wallet-password 'some super secret password' 

Once the parameters were provided, the node would try loading and using private keys to generate blocks.

How to create a wallet file

To create a wallet file use the wallet utility. Please download a suitable version of the wallet utility from the Releases page. The following command will add a seed to the wallet file:

./wallet add -w [path to the wallet file]

The utility would ask for a seed phrase and a password to encrypt the new wallet file. If a wallet file does not exist, the file will be created.

It is possible to provide not only a seed phrase, but also a Base58 encoded seed in a compatible with waves.exchange application format. To do so add -b flag:

./wallet add -w [path to the wallet file] -b

Enter the string of a Base58 encoded seed (It will be asked).

To list the seed, run the next command and provide the password.

./wallet show -w [path to the wallet file]

Client library examples

Create sender's public key from BASE58 string:

   sender, err := crypto.NewPublicKeyFromBase58("<your-public-key>")
   if err != nil {
       panic(err)
   }

Create sender's private key from BASE58 string:

    sk, err := crypto.NewSecretKeyFromBase58("<your-private-key>")
    if err != nil {
        panic(err)
    }

Create script's address:

    a, err := proto.NewAddressFromString("<script's address")
    if err != nil {
        panic(err)
    }

Create Function Call that will be passed to the script:

    fc := proto.FunctionCall{
        Name: "foo",
        Arguments: proto.Arguments{
            proto.IntegerArgument{
                Value: 12345,
            },
            proto.BooleanArgument{
                Value: true,
            },
        },
    }

New InvokeScript Transaction:

    tx, err := proto.NewUnsignedInvokeScriptV1('T', sender, a, fc, proto.ScriptPayments{}, waves, 500000, uint64(ts))
    if err != nil {
        panic(err)
    }

Sign the transaction with the private key:

    err = tx.Sign(sk)

Create new HTTP client to send the transaction to public TestNet nodes:

    client, err := client.NewClient(client.Options{BaseUrl: "https://testnodes.wavesnodes.com", Client: &http.Client{}})
    if err != nil {
        panic(err)
    }

Send the transaction to the network:

    _, err = client.Transactions.Broadcast(ctx, tx)
    if err != nil {
        panic(err)
    }

What's done

• Full blockchain support of Waves version 1.3
• Full support of RIDE version 5
• RIDE DApp-to-DApp invocations
• Full support of gRPC API
• Block generation
• Partial and very limited support of REST API
• Fast and optimized import of blockchain
• Fast and optimized RIDE evaluation

Known issues

• Reduced REST API, only few methods are available

Future plans

• Full support of REST API
• Extensive integration testing
• RIDE v6, MetaMask support

Building from sources

Go version 1.18 or later is required to build the node, importer, wallet and other tools.

To build a node, importer or other tools run a make command:

make release-importer
make release-node
...

Other Tools

• chaincmp - utility to compare blockchains on few nodes
• wmd - service to provide a market data for Waves DEX transactions

Download Details:
Author: wavesplatform
Source Code: https://github.com/wavesplatform/gowaves
License: MIT license

#waves  #blockchain  #smartcontract #go 

Blockchain Certification | Blockchain Training Course | Blockchain Council

In all the market sectors, Blockchain technology has contributed to the redesign. The improvements that were once impossible have been pushed forward. Blockchain is one of the leading innovations with the ability to influence the various sectors of the industry. It also has the ability to be one of the career-influencing innovations at the same time. We have seen an increasing inclination towards the certification of the Blockchain in recent years, and there are obvious reasons behind it. Blockchain has everything to offer, from good packages to its universal application and futuristic development. Let’s address the reasons why one should go for Blockchain certification.

5 advantages of certification by Blockchain:

1. Lucrative packages- Everyone who completes their education or upskills themselves wants to end up with a good bundle, not only is one assured of a good learning experience with Blockchain, but the packages are drool-worthy at the same time. A Blockchain developer’s average salary varies between $150,000 and $175,000 per annum. Comparatively, a software developer gets a $137,000 per year salary. For a Blockchain developer, the San Francisco Bay area provides the highest bundle, amounting to $162,288 per annum. There’s no point arguing that learning about Blockchain is a smart decision with such lucrative packages.

2. Growing industry- When you select any qualification course, it becomes important that you choose a growing segment or industry that promises potential in the future. You should anticipate all of these with Blockchain. The size of the blockchain market is expected to rise from USD 3.0 billion in 2020 to USD 39.7 billion by 2025. This will see an incredible 67.3 percent CAGR between 2020-2025. To help business processes, several businesses are outsourcing Blockchain technologies. This clearly demonstrates that there will be higher demand in the future for Blockchain developers and certified Blockchain professionals.

3. Universal application- One of the major reasons for the success of Blockchain is that it has a global application. It is not sector-specific. Blockchain usage cases are discovered by almost all market segments. In addition, other innovations such as AI, big data, data science and much more are also supported by Blockchain. It becomes easier to get into a suitable industry once you know about Blockchain.

**4. Work protection-**Surely you would like to invest in an ability that ensures job security. You had the same chance for Blockchain. Since this is the technology of the future, understanding that Blockchain can keep up with futuristic developments will help in a successful and safe job.

**5.**After a certain point of your professional life, you are expected to learn about new abilities that can help enhance your skills. Upskilling is paramount. Upskilling oneself has become the need for the hour, and choosing a path that holds a lot of potential for the future is the best way to do this. For all computer geeks and others who want to gain awareness of emerging technology, Blockchain is a good option.

Concluding thoughts- opting for Blockchain certification is a successful career move with all these advantages. You will be able to find yourself in a safe and secured work profile once you have all the knowledge and information. Link for Blockchain certification programme with the Blockchain Council.

#blockchain certificate #blockchain training #blockchain certification #blockchain developers #blockchain #blockchain council

5 Blockchain Applications That Have Transformed the World of Technology

The blockchain is the decentralized database of the blocks of information, which gets recorded in the chain format and linked in a secured crypto graphical manner. This technology ensures proper safety of the data due to its secure nature, and it totally changes how people carry out transactions. It also brings about a faster and secure process of validating information needed to establish reliability.

Though blockchain technology came into the market to carry out only digital transactions, it is now used in various industries like supply chain, finance, health care, and many more.

The blockchain technology has made its position in mobile app development as well. Blockchain applications are transparent and accountable. From getting easy access to medical records and buying insurance, you can see blockchain applications everywhere.

Here are some of the areas where you can see the use of blockchain applications and how they have changed various industries.

1. Ripple

Ripple is useful for increasing banking transactions. The implementation of blockchain technology in the financial sector is much more profound than any other sector. Ripple proves this. It is one of the greatest tools to record and complete financial transactions.

It develops a large network despite strict physical boundaries. As there is no such third-party involvement present, the cost of these transactions is lower than usual. At the same time, the network also remains transparent and quite secured.

It is normally seen that financial transactions that happen globally are

error-prone and take a lot of time. In addition to this, when the transaction

fees and exchange rates get added up, the total cost usually gets high.

However, Ripple offers real-time international transactions without spending too much money. It has the network of about 200+ institutions making the process affordable, secure, and fast for all sorts of international transactions.

2. Etherisc

This blockchain application helps in automating flight insurance. Insurance is another area where blockchain is gaining popularity. Through this application, insurers can make smart contracts rather than getting involved in the traditional contracts that are usually complex. Etherisc is the blockchain application that helps customers buy flight insurance. If the flight gets canceled or delayed, they do not have to wait for months to get the payment back. This application ensures an on-time payout.

#blockchain #blockchain-technology #blockchain-development #blockchain-use-cases #blockchain-a #blockchain-technologies #technology #decentralization

What's new in the go 1.15

Go announced Go 1.15 version on 11 Aug 2020. Highlighted updates and features include Substantial improvements to the Go linker, Improved allocation for small objects at high core counts, X.509 CommonName deprecation, GOPROXY supports skipping proxies that return errors, New embedded tzdata package, Several Core Library improvements and more.

As Go promise for maintaining backward compatibility. After upgrading to the latest Go 1.15 version, almost all existing Golang applications or programs continue to compile and run as older Golang version.

#go #golang #go 1.15 #go features #go improvement #go package #go new features

Top 8 Machine Learning Libraries In Go Language One Must Know

Created by Google researchers, Go is a popular open-source programming language. The language includes many intuitive features, including a garbage collector, cross-platform, efficient concurrency, among others.

According to the Stack Overflow Developer Survey 2020, Go language is not only the fifth most loved programming language but also fetches the programmers the third-highest salary among other languages.

Below here, we list down the top machine learning libraries in Go language.

#opinions #go language #google ml tools #machine learning libraries #ml libraries #ml libraries in go