Installation and usage of the platform

Examples of JavaScript SDK usage

Token transfer (4)

const { create: createApiInstance, MAINNET_CONFIG } = require('..');
const nodeFetch = require('node-fetch');

const nodeAddress = 'https://hoover.welocal.dev/node-0';
const seedPhrase = 'examples seed phrase';

const fetch = (url, options = {}) => {
  const headers = options.headers || {}
  return nodeFetch(url, { ...options, headers: {...headers, 'x-api-key': 'wavesenterprise'} });
}

(async () => {
  const { chainId, minimumFee, gostCrypto } = await (await fetch(`${nodeAddress}/node/config`)).json();

  const wavesApiConfig = {
    ...MAINNET_CONFIG,
    nodeAddress,
    crypto: gostCrypto ? 'gost' : 'waves',
    networkByte: chainId.charCodeAt(0),
  };

  const Waves = createApiInstance({
    initialConfiguration: wavesApiConfig,
    fetchInstance: fetch
  });

  // Create Seed object from phrase
  const seed = Waves.Seed.fromExistingPhrase(seedPhrase);


  // see docs: https://docs.wavesenterprise.com/en/latest/how-the-platform-works/data-structures/transactions-structure.html#transfertransaction
  const txBody = {
    recipient: seed.address,
    assetId: '',
    amount: 10000,
    fee: minimumFee[4],
    attachment: Waves.tools.base58.encode('Examples transfer attachment'),
    timestamp: Date.now()
  }

  const tx = Waves.API.Transactions.Transfer.V3(txBody);

  try {
    const result = await tx.broadcast(seed.keyPair);
    console.log('Broadcast transfer result: ', result)
  } catch (err) {
    console.log('Broadcast error:', err)
  }

})();

Creation of a confidential data group (112)

const { create: createApiInstance, MAINNET_CONFIG } = require('..');
const nodeFetch = require('node-fetch');

const nodeAddress = 'https://hoover.welocal.dev/node-0';
const seedPhrase = 'examples seed phrase';

const fetch = (url, options = {}) => {
    const headers = options.headers || {}
    return nodeFetch(url, { ...options, headers: {...headers, 'x-api-key': 'wavesenterprise'} });
}

(async () => {
    const { chainId, minimumFee, gostCrypto } = await (await fetch(`${nodeAddress}/node/config`)).json();

    const wavesApiConfig = {
        ...MAINNET_CONFIG,
        nodeAddress,
        crypto: gostCrypto ? 'gost' : 'waves',
        networkByte: chainId.charCodeAt(0),
    };

    const Waves = createApiInstance({
        initialConfiguration: wavesApiConfig,
        fetchInstance: fetch
    });

    // Create Seed object from phrase
    const seed = Waves.Seed.fromExistingPhrase(seedPhrase);

    // Transaction data
    // https://docs.wavesenterprise.com/en/latest/how-the-platform-works/data-structures/transactions-structure.html#createpolicytransaction
    const txBody = {
        sender: seed.address,
        policyName: 'Example policy',
        description: 'Description for example policy',
        owners: [seed.address],
        recipients: [],
        fee: minimumFee[112],
        timestamp: Date.now(),
    }

    const tx = Waves.API.Transactions.CreatePolicy.V3(txBody);

    try {
        const result = await tx.broadcast(seed.keyPair);
        console.log('Broadcast PolicyCreate result: ', result)
    } catch (err) {
        console.log('Broadcast error:', err)
    }

})();

Permission adding and removing (102)

const { create: createApiInstance, MAINNET_CONFIG } = require('..');
const nodeFetch = require('node-fetch');

const nodeAddress = 'https://hoover.welocal.dev/node-0';
const seedPhrase = 'examples seed phrase';

const fetch = (url, options = {}) => {
    const headers = options.headers || {}
    return nodeFetch(url, { ...options, headers: {...headers, 'x-api-key': 'wavesenterprise'} });
}

(async () => {
    const { chainId, minimumFee, gostCrypto } = await (await fetch(`${nodeAddress}/node/config`)).json();

    const wavesApiConfig = {
        ...MAINNET_CONFIG,
        nodeAddress,
        crypto: gostCrypto ? 'gost' : 'waves',
        networkByte: chainId.charCodeAt(0),
    };

    const Waves = createApiInstance({
        initialConfiguration: wavesApiConfig,
        fetchInstance: fetch
    });

    // Create Seed object from phrase
    const seed = Waves.Seed.fromExistingPhrase(seedPhrase);
    const targetSeed = Waves.Seed.create(15);

    // https://docs.wavesenterprise.com/en/latest/how-the-platform-works/data-structures/transactions-structure.html#permittransaction
    const txBody = {
        target: targetSeed.address,
        opType: 'add',
        role: 'issuer',
        fee: minimumFee[102],
        timestamp: Date.now(),
    }

    const permTx = Waves.API.Transactions.Permit.V2(txBody);

    try {
        const result = await permTx.broadcast(seed.keyPair);
        console.log('Broadcast ADD PERMIT: ', result)

        const waitTimeout = 30

        console.log(`Wait ${waitTimeout} seconds while tx is mining...`)

        await new Promise(resolve => {
            setTimeout(resolve, waitTimeout * 1000)
        })

        const removePermitBody = {
            ...txBody,
            opType: 'remove',
            timestamp: Date.now()
        }

        const removePermitTx = Waves.API.Transactions.Permit.V2(removePermitBody);

        const removePermitResult = await removePermitTx.broadcast(seed.keyPair);

        console.log('Broadcast REMOVE PERMIT: ', removePermitResult)
    } catch (err) {
        console.log('Broadcast error:', err)
    }

})();

Smart contract creation (103)

const { create: createApiInstance, MAINNET_CONFIG } = require('..');
const nodeFetch = require('node-fetch');

const nodeAddress = 'https://hoover.welocal.dev/node-0';
const seedPhrase = 'examples seed phrase';

const fetch = (url, options = {}) => {
    const headers = options.headers || {}
    return nodeFetch(url, { ...options, headers: {...headers, 'x-api-key': 'wavesenterprise'} });
}

(async () => {
    const { chainId, minimumFee, gostCrypto } = await (await fetch(`${nodeAddress}/node/config`)).json();

    const wavesApiConfig = {
        ...MAINNET_CONFIG,
        nodeAddress,
        crypto: gostCrypto ? 'gost' : 'waves',
        networkByte: chainId.charCodeAt(0),
    };

    const Waves = createApiInstance({
        initialConfiguration: wavesApiConfig,
        fetchInstance: fetch
    });

    // Create Seed object from phrase
    const seed = Waves.Seed.fromExistingPhrase(seedPhrase);

    const timestamp  = Date.now();

    //body description: https://docs.wavesenterprise.com/en/latest/how-the-platform-works/data-structures/transactions-structure.html#createcontracttransaction
    const txBody = {
        senderPublicKey: seed.keyPair.publicKey,
        image: 'we-sc/grpc-contract-example:2.1',
        imageHash: '9fddd69022f6a47f39d692dfb19cf2bdb793d8af7b28b3d03e4d5d81f0aa9058',
        contractName: 'Sample GRPC contract',
        timestamp,
        params: [],
        fee: minimumFee[103]
    };

    const tx = Waves.API.Transactions.CreateContract.V3(txBody)

    try {
        const result = await tx.broadcast(seed.keyPair);
        console.log('Broadcast docker create result: ', result)
    } catch (err) {
        console.log('Broadcast error:', err)
    }

})();

Smart contract call (104)

const { create: createApiInstance, MAINNET_CONFIG } = require('..');
const nodeFetch = require('node-fetch');

const nodeAddress = 'https://hoover.welocal.dev/node-0';
const seedPhrase = 'examples seed phrase';

const fetch = (url, options = {}) => {
    const headers = options.headers || {}
    return nodeFetch(url, { ...options, headers: {...headers, 'x-api-key': 'wavesenterprise'} });
}

(async () => {
    const { chainId, minimumFee, gostCrypto } = await (await fetch(`${nodeAddress}/node/config`)).json();

    const wavesApiConfig = {
        ...MAINNET_CONFIG,
        nodeAddress,
        crypto: gostCrypto ? 'gost' : 'waves',
        networkByte: chainId.charCodeAt(0),
    };

    const Waves = createApiInstance({
        initialConfiguration: wavesApiConfig,
        fetchInstance: fetch
    });

    // Create Seed object from phrase
    const seed = Waves.Seed.fromExistingPhrase(seedPhrase);

    const timestamp  = Date.now()

    //body description: https://docs.wavesenterprise.com/en/latest/how-the-platform-works/data-structures/transactions-structure.html#callcontracttransaction
    const txBody = {
        authorPublicKey: seed.keyPair.publicKey,
        contractId: '4pSJoWsaYvT8iCSAxUYdc7LwznFexnBGPRoUJX7Lw3sh', // Predefined contract
        contractVersion: 1,
        timestamp,
        params: [],
        fee: minimumFee[104]
    };

    const tx = Waves.API.Transactions.CallContract.V4(txBody)

    try {
        const result = await tx.broadcast(seed.keyPair);
        console.log('Broadcast docker call result: ', result)
    } catch (err) {
        console.log('Broadcast error:', err)
    }

})();

Atomic transaction (120)

const { create: createApiInstance, MAINNET_CONFIG } = require('..');
const nodeFetch = require('node-fetch');

const nodeAddress = 'https://hoover.welocal.dev/node-0';
const seedPhrase = 'examples seed phrase';

const fetch = (url, options = {}) => {
  const headers = options.headers || {}
  return nodeFetch(url, { ...options, headers: {...headers, 'x-api-key': 'wavesenterprise'} });
}

(async () => {
  const { chainId, minimumFee, gostCrypto } = await (await fetch(`${nodeAddress}/node/config`)).json();

  const wavesApiConfig = {
    ...MAINNET_CONFIG,
    nodeAddress,
    crypto: gostCrypto ? 'gost' : 'waves',
    networkByte: chainId.charCodeAt(0),
  };

  const Waves = createApiInstance({
    initialConfiguration: wavesApiConfig,
    fetchInstance: fetch
  });

  // Create Seed object from phrase
  const seed = Waves.Seed.fromExistingPhrase(seedPhrase);

  const transfer1Body = {
    recipient: seed.address,
    amount: 10000,
    fee: minimumFee[4],
    attachment: Waves.tools.base58.encode('Its beautiful!'),
    timestamp: Date.now(),
    atomicBadge: {
      trustedSender: seed.address
    }
  }

  const transfer1 = Waves.API.Transactions.Transfer.V3(transfer1Body);

  const transfer2Body = {
    recipient: seed.address,
    amount: 100000,
    fee: minimumFee[4],
    attachment: Waves.tools.base58.encode('Its beautiful!'),
    timestamp: Date.now(),
    atomicBadge: {
      trustedSender: seed.address
    }
  }

  const transfer2 = Waves.API.Transactions.Transfer.V3(transfer2Body);

  const dockerCall1Body = {
    authorPublicKey: seed.keyPair.publicKey,
    contractId: '4pSJoWsaYvT8iCSAxUYdc7LwznFexnBGPRoUJX7Lw3sh', // Predefined contract
    contractVersion: 1,
    timestamp: Date.now(),
    params: [],
    fee: minimumFee[104],
    atomicBadge: {
      trustedSender: seed.address
    }
  }

  const dockerCall1 = Waves.API.Transactions.CallContract.V4(dockerCall1Body);

  const dockerCall2Body = {
    authorPublicKey: seed.keyPair.publicKey,
    contractId: '4pSJoWsaYvT8iCSAxUYdc7LwznFexnBGPRoUJX7Lw3sh',
    contractVersion: 1,
    timestamp: Date.now() + 1,
    params: [],
    fee: minimumFee[104],
    atomicBadge: {
      trustedSender: seed.address
    }
  }

  const dockerCall2 = Waves.API.Transactions.CallContract.V4(dockerCall1Body);

  const policyDataText = `Some random text ${Date.now()}`
  const uint8array = Waves.tools.convert.stringToByteArray(policyDataText);
  const { base64Text, hash } = Waves.tools.encodePolicyData(uint8array)

  const policyDataHashBody = {
    "sender": "3NkZd8Xd4KsuPiNVsuphRNCZE3SqJycqv8d",
    "policyId": "9QUUuQ5XetCe2wEyrSX95NEVzPw2bscfcFfAzVZL5ZJN",
    "type": "file",
    "data": base64Text,
    "hash": hash,
    "info": {
      "filename":"test-send1.txt",
      "size":1,
      "timestamp": Date.now(),
      "author":"[email protected]",
      "comment":""
    },
    "fee": 5000000,
    "password": "sfgKYBFCF@#$fsdf()*%",
    "timestamp": Date.now(),
    "version": 3,
    "apiKey": 'wavesenterprise',
  }
  const policyDataHashTxBody = {
    ...policyDataHashBody,
    atomicBadge: {
      trustedSender: seed.address
    }
  }

  const policyDataHashTx = Waves.API.Transactions.PolicyDataHash.V3(policyDataHashTxBody);

  try {
    const transactions = [transfer1, transfer2, policyDataHashTx]
    const broadcast = await Waves.API.Transactions.broadcastAtomic(
      Waves.API.Transactions.Atomic.V1({transactions}),
      seed.keyPair
    );
    console.log('Atomic broadcast successful, tx id:', broadcast.id)
  } catch (err) {
    console.log('Create atomic error:', err)
  }

})();

Token issue/burning (3 / 6)

const { create: createApiInstance, MAINNET_CONFIG } = require('..');
const nodeFetch = require('node-fetch');

const nodeAddress = 'https://hoover.welocal.dev/node-0';
const seedPhrase = 'examples seed phrase';

const fetch = (url, options = {}) => {
    const headers = options.headers || {}
    return nodeFetch(url, { ...options, headers: {...headers, 'x-api-key': 'wavesenterprise'} });
}

(async () => {
    const { chainId, minimumFee, gostCrypto } = await (await fetch(`${nodeAddress}/node/config`)).json();

    const wavesApiConfig = {
        ...MAINNET_CONFIG,
        nodeAddress,
        crypto: gostCrypto ? 'gost' : 'waves',
        networkByte: chainId.charCodeAt(0),
    };

    const Waves = createApiInstance({
        initialConfiguration: wavesApiConfig,
        fetchInstance: fetch
    });

    // Create Seed object from phrase
    const seed = Waves.Seed.fromExistingPhrase(seedPhrase);

    const quantity = 1000000

    //https://docs.wavesenterprise.com/en/latest/how-the-platform-works/data-structures/transactions-structure.html#issuetransaction
    const issueBody = {
        name: 'Sample token',
        description: 'The best token ever made',
        quantity,
        decimals: 8,
        reissuable: false,
        chainId: Waves.config.getNetworkByte(),
        fee: minimumFee[3],
        timestamp: Date.now(),
        script: null
    }

    const issueTx = Waves.API.Transactions.Issue.V2(issueBody)
    try {
        const result = await issueTx.broadcast(seed.keyPair);

        console.log('Broadcast ISSUE result: ', result)
        const waitTimeout = 30
        console.log(`Wait ${waitTimeout} seconds while tx is mining...`)

        await new Promise(resolve => {
            setTimeout(resolve, waitTimeout * 1000)
        })

        const burnBody = {
            assetId: result.assetId,
            amount: quantity,
            fee: minimumFee[6],
            chainId: Waves.config.getNetworkByte(),
            timestamp: Date.now()
        }

        const burnTx = Waves.API.Transactions.Burn.V2(burnBody)

        const burnResult = await burnTx.broadcast(seed.keyPair);
        console.log('Broadcast BURN result: ', burnResult)
    } catch (err) {
        console.log('Broadcast error:', err)
    }

})();

See also

JavaScript SDK

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