[sdk/javascript] NEM - automatic population for fields levySize and messageEnvelopeSize

[cryptoBeliever]

Current Behaviour

SDK user has to specify fields manually:

• levySize
• messageEnvelopeSize

Expected Behaviour

Fields levySize and messageEnvelopeSize can be calculated based on other values in the transaction. We don't need to force users to calculate and specify it manually.

The corresponding issue for Python SDK: #292

[gimre-xymcity]

part of js sdk 3.0.4

[cryptoBeliever]

I've tested JS SDK on the current dev branch, and SDK users don't need any more fill:

• messageEnvelopeSize when sensing transfer transaction
• levySize when sending mosaic definition transaction

I've not noticed any issues 👍

Example tx construction for transfer transaction:

const transferTransaction = facade.transactionFactory.create({
        type: 'transfer_transaction_v1',
        fee: BigInt(100000),
        signerPublicKey: keyPair.publicKey,
        recipientAddress: 'TAZLVBLIBA72UDZKY2N6PEW7SPQHHYOWIT4PRRNP',
        timestamp: Number(Math.ceil(timestamp / 1000)),
        deadline: Number(Math.ceil(timestamp / 1000 + 60 * 60)),
        amount: BigInt(1000000),
        message: {
            messageType: 'plain',
            message: 'Good Luck!'
        }
    });

Example ex construction for mosaic creation with levy:

const transferTransaction = facade.transactionFactory.create({
        type: 'mosaic_definition_transaction_v1',
        fee: 200000n,
        signerPublicKey: keyPair.publicKey,
        timestamp: Number(Math.ceil(timestamp / 1000)),
        deadline: Number(Math.ceil(timestamp / 1000 + 60 * 60)),
        rentalFee: 10000000n,
        rentalFeeSink: 'TBMOSAICOD4F54EE5CDMR23CCBGOAM2XSJBR5OLC',
        mosaicDefinition: {
           ownerPublicKey: keyPair.publicKey,
           id: {
               namespaceId: {
                   name: textEncoder.encode('supernamespace')
               },
               name: textEncoder.encode('awesome_mosaic5')
           },
           description: textEncoder.encode('Just testing'),
           properties: [
               { property: { name: textEncoder.encode('divisibility'), value: textEncoder.encode('0') } },
               { property: { name: textEncoder.encode('initialSupply'), value: textEncoder.encode('1000') } },
               { property: { name: textEncoder.encode('supplyMutable'), value: textEncoder.encode('true') } },
               { property: { name: textEncoder.encode('transferable'), value: textEncoder.encode('true') } }
           ],
           levy: {
             transferFeeType: 'absolute',
             recipientAddress: address,
             mosaicId: { namespaceId: { name: textEncoder.encode('nem') }, name: textEncoder.encode('xem') },
             fee: 632_0000n
           }
        }
    });