How to use the @liquality/crypto.padHexStart function in @liquality/crypto

generateRawTx (initiationTx, voutIndex, address, input, locktime) {
    const output = initiationTx.outputs[voutIndex]
    const value = parseInt(reverseBuffer(output.amount).toString('hex'), 16)
    const fee = this.getMethod('calculateFee')(1, 1, 3)
    const amount = value - fee
    const amountLE = Buffer.from(padHexStart(amount.toString(16), 16), 'hex').reverse().toString('hex') // amount in little endian
    const pubKeyHash = addressToPubKeyHash(address)

    return [
      '01000000', // VERSION
      input,
      '01', // NUM OUTPUTS
      amountLE,
      '19', // data size to be pushed
      '76', // OP_DUP
      'a9', // OP_HASH160
      '14', // data size to be pushed
      pubKeyHash, // 
      '88', // OP_EQUALVERIFY
      'ac', // OP_CHECKSIG
      locktime // LOCKTIME
    ].join('')

createSeizableCollateralScript (borrowerPubKey, lenderPubKey, secretHashA1, secretHashA2, secretHashB2, secretHashB3, loanExpiration, biddingExpiration, seizureExpiration) {
    let loanExpirationHex = scriptNumEncode(loanExpiration)
    let biddingExpirationHex = scriptNumEncode(biddingExpiration)
    let seizureExpirationHex = scriptNumEncode(seizureExpiration)

    const borrowerPubKeyHash = hash160(borrowerPubKey)
    const borrowerPubKeyPushDataOpcode = padHexStart((borrowerPubKey.length / 2).toString(16))

    const lenderPubKeyHash = hash160(lenderPubKey)
    const lenderPubKeyPushDataOpcode = padHexStart((lenderPubKey.length / 2).toString(16))

    const loanExpirationPushDataOpcode = padHexStart(loanExpirationHex.length.toString(16))
    const loanExpirationHexEncoded = loanExpirationHex.toString('hex')
    const biddingExpirationPushDataOpcode = padHexStart(biddingExpirationHex.length.toString(16))
    const biddingExpirationHexEncoded = biddingExpirationHex.toString('hex')
    const seizureExpirationPushDataOpcode = padHexStart(seizureExpirationHex.length.toString(16))
    const seizureExpirationHexEncoded = seizureExpirationHex.toString('hex')

    return [
      '63', // OP_IF
      '82', // OP_SIZE
      '01', // OP_PUSHDATA(1)
      '20', // Hex 32

createSeizableCollateralScript (borrowerPubKey, lenderPubKey, secretHashA1, secretHashA2, secretHashB2, secretHashB3, loanExpiration, biddingExpiration, seizureExpiration) {
    let loanExpirationHex = scriptNumEncode(loanExpiration)
    let biddingExpirationHex = scriptNumEncode(biddingExpiration)
    let seizureExpirationHex = scriptNumEncode(seizureExpiration)

    const borrowerPubKeyHash = hash160(borrowerPubKey)
    const borrowerPubKeyPushDataOpcode = padHexStart((borrowerPubKey.length / 2).toString(16))

    const lenderPubKeyHash = hash160(lenderPubKey)
    const lenderPubKeyPushDataOpcode = padHexStart((lenderPubKey.length / 2).toString(16))

    const loanExpirationPushDataOpcode = padHexStart(loanExpirationHex.length.toString(16))
    const loanExpirationHexEncoded = loanExpirationHex.toString('hex')
    const biddingExpirationPushDataOpcode = padHexStart(biddingExpirationHex.length.toString(16))
    const biddingExpirationHexEncoded = biddingExpirationHex.toString('hex')
    const seizureExpirationPushDataOpcode = padHexStart(seizureExpirationHex.length.toString(16))
    const seizureExpirationHexEncoded = seizureExpirationHex.toString('hex')

    return [
      '63', // OP_IF
      '82', // OP_SIZE
      '01', // OP_PUSHDATA(1)
      '20', // Hex 32
      '88', // OP_EQUALVERIFY
      'a8', // OP_SHA256
      '20', secretHashB2, // OP_PUSHDATA(32) {secretHashB2}
      '88', // OP_EQUALVERIFY
      '76', 'a9', // OP_DUP OP_HASH160

} else if (period === 'seizurePeriod' && !requiresSecret) {
      ifBranch = ['00', '00']
    } else if (period === 'refundPeriod') {
      ifBranch = ['00', '00', '00']
    }

    const encodedSecret = requiresSecret
      ? [
        padHexStart((secret.length / 2).toString(16)), // OP_PUSHDATA({secretLength})
        secret
      ]
      : [] // OP_0

    const signatureEncoded = signature + '01'
    const signaturePushDataOpcode = padHexStart((signatureEncoded.length / 2).toString(16))
    const pubKeyPushDataOpcode = padHexStart((pubKey.length / 2).toString(16))

    const bytecode = [
      signaturePushDataOpcode,
      signatureEncoded,
      pubKeyPushDataOpcode,
      pubKey,
      ...encodedSecret,
      ...ifBranch
    ]

    return bytecode.join('')
  }

createSeizableCollateralScript (borrowerPubKey, lenderPubKey, secretHashA1, secretHashA2, secretHashB2, secretHashB3, loanExpiration, biddingExpiration, seizureExpiration) {
    let loanExpirationHex = scriptNumEncode(loanExpiration)
    let biddingExpirationHex = scriptNumEncode(biddingExpiration)
    let seizureExpirationHex = scriptNumEncode(seizureExpiration)

    const borrowerPubKeyHash = hash160(borrowerPubKey)
    const borrowerPubKeyPushDataOpcode = padHexStart((borrowerPubKey.length / 2).toString(16))

    const lenderPubKeyHash = hash160(lenderPubKey)
    const lenderPubKeyPushDataOpcode = padHexStart((lenderPubKey.length / 2).toString(16))

    const loanExpirationPushDataOpcode = padHexStart(loanExpirationHex.length.toString(16))
    const loanExpirationHexEncoded = loanExpirationHex.toString('hex')
    const biddingExpirationPushDataOpcode = padHexStart(biddingExpirationHex.length.toString(16))
    const biddingExpirationHexEncoded = biddingExpirationHex.toString('hex')
    const seizureExpirationPushDataOpcode = padHexStart(seizureExpirationHex.length.toString(16))
    const seizureExpirationHexEncoded = seizureExpirationHex.toString('hex')

    return [
      '63', // OP_IF
      '82', // OP_SIZE
      '01', // OP_PUSHDATA(1)
      '20', // Hex 32
      '88', // OP_EQUALVERIFY
      'a8', // OP_SHA256
      '20', secretHashB2, // OP_PUSHDATA(32) {secretHashB2}

_spendMultisigCollateral (secretA2, secretB3, borrowerSignature, lenderSignature) {
    const ifBranch = ['51', '00']

    const secretA2PushDataOpcode = padHexStart((secretA2.length / 2).toString(16))
    const secretB3PushDataOpcode = padHexStart((secretB3.length / 2).toString(16))

    const borrowerSignatureEncoded = borrowerSignature + '01'
    const borrowerSignaturePushDataOpcode = padHexStart((borrowerSignatureEncoded.length / 2).toString(16))
    const lenderSignatureEncoded = lenderSignature + '01'
    const lenderSignaturePushDataOpcode = padHexStart((lenderSignatureEncoded.length / 2).toString(16))

    const bytecode = [
      '00',
      borrowerSignaturePushDataOpcode,
      borrowerSignatureEncoded,
      lenderSignaturePushDataOpcode,
      lenderSignatureEncoded,
      secretB3PushDataOpcode,
      secretB3,
      secretA2PushDataOpcode,
      secretA2,
      ...ifBranch
    ]

    return bytecode.join('')
  }

async withdrawLoanFund (initiationTxHash, amount) {
    const functionSignature = '0x2e1a7d4d'
    const initiationTransaction = await this.getMethod('getTransactionReceipt')(initiationTxHash)
    const encodedAmount = padHexStart(new BigNumber(amount).toString(16), 64)
    return this.getMethod('sendTransaction')(initiationTransaction.contractAddress, 0, functionSignature + encodedAmount)
  }

bidLoan (contractAddress, secretHashC, bidValue, aCoinAddress) {
    const encodedBidValue = padHexStart(new BigNumber(bidValue).toString(16), 64)
    const encodedACoinAddress = padHexStart(aCoinAddress, 64)

    return this.getMethod('sendTransaction')(contractAddress, 0, '0x92b0c7ab' + secretHashC + encodedBidValue + encodedACoinAddress)
  }

generateErc20Transfer (to, value) {
    value = BigNumber(value).toString(16)

    const encodedAddress = padHexStart(remove0x(to), 64)
    const encodedValue = padHexStart(value, 64)

    return [
      remove0x(SOL_TRANSFER_FUNCTION),
      encodedAddress,
      encodedValue
    ].join('').toLowerCase()
  }