How to use the icon-sdk-js.IconConverter.toHex function in icon-sdk-js

async buildDeployTransaction() {
        const { DeployTransactionBuilder } = IconBuilder;

        const initialSupply = IconConverter.toBigNumber("100000000000");
        const decimals = IconConverter.toBigNumber("18");
        const tokenName = "StandardToken";
        const tokenSymbol = "ST";
        const contentType = "application/zip";
        // Enter token information
        // key name ("initialSupply", "decimals", "name", "symbol")
        // You must enter the given values. Otherwise, your transaction will be rejected.
        const params = {
            initialSupply: IconConverter.toHex(initialSupply),
            decimals: IconConverter.toHex(decimals),
            name: tokenName,
            symbol: tokenSymbol
        }
        const installScore = MockData.SCORE_INSTALL_ADDRESS;
        const stepLimit = await this.getMaxStepLimit();
        const walletAddress = this.wallet.getAddress();
        // networkId of node 1:mainnet, 2~:etc
        const networkId = IconConverter.toBigNumber(3);
        const version = IconConverter.toBigNumber(3);
        // Timestamp is used to prevent the identical transactions. Only current time is required (Standard unit : us)
        // If the timestamp is considerably different from the current time, the transaction will be rejected.
        const timestamp = (new Date()).getTime() * 1000;

        //Enter transaction information
        const deployTransactionBuilder = new DeployTransactionBuilder();

async buildDeployTransaction() {
        const { DeployTransactionBuilder } = IconBuilder;

        const initialSupply = IconConverter.toBigNumber("100000000000");
        const decimals = IconConverter.toBigNumber("18");
        const tokenName = "StandardToken";
        const tokenSymbol = "ST";
        const contentType = "application/zip";
        // Enter token information
        // key name ("initialSupply", "decimals", "name", "symbol")
        // You must enter the given values. Otherwise, your transaction will be rejected.
        const params = {
            initialSupply: IconConverter.toHex(initialSupply),
            decimals: IconConverter.toHex(decimals),
            name: tokenName,
            symbol: tokenSymbol
        }
        const installScore = MockData.SCORE_INSTALL_ADDRESS;
        const stepLimit = await this.getMaxStepLimit();
        const walletAddress = this.wallet.getAddress();
        // networkId of node 1:mainnet, 2~:etc
        const networkId = IconConverter.toBigNumber(3);
        const version = IconConverter.toBigNumber(3);
        // Timestamp is used to prevent the identical transactions. Only current time is required (Standard unit : us)
        // If the timestamp is considerably different from the current time, the transaction will be rejected.
        const timestamp = (new Date()).getTime() * 1000;

        //Enter transaction information
        const deployTransactionBuilder = new DeployTransactionBuilder();
        const transaction = deployTransactionBuilder

// You can use "governance score apis" to get step costs.
        const value = IconAmount.of(1, IconAmount.Unit.ICX).toLoop();
        const stepLimit = await this.getDefaultStepCost();
        // networkId of node 1:mainnet, 2~:etc
        const networkId = IconConverter.toBigNumber(3);
        const version = IconConverter.toBigNumber(3);
        // Timestamp is used to prevent the identical transactions. Only current time is required (Standard unit : us)
        // If the timestamp is considerably different from the current time, the transaction will be rejected.
        const timestamp = (new Date()).getTime() * 1000;
        // SCORE name that send transaction is “transfer”.
        const methodName = "transfer";
        // Enter receiving address and the token value.
        // You must enter the given key name("_to", "_value"). Otherwise, the transaction will be rejected.
        const params = {
            _to: MockData.WALLET_ADDRESS_2,
            _value: IconConverter.toHex(value)
        }
        
        //Enter transaction information
        const tokenTransactionBuilder = new CallTransactionBuilder();
        const transaction = tokenTransactionBuilder
            .nid(networkId)
            .from(walletAddress)
            .to(this.scoreAddress)
            .stepLimit(stepLimit)
            .timestamp(timestamp)
            .method(methodName)
            .params(params)
            .version(version)
            .build();        
        return transaction;
    }

// You can use "governance score apis" to get step costs.
        const value = IconAmount.of(1, IconAmount.Unit.ICX).toLoop();
        const stepLimit = this.getDefaultStepCost();
        // networkId of node 1:mainnet, 2~:etc
        const networkId = IconConverter.toBigNumber(3);
        const version = IconConverter.toBigNumber(3);
        // Timestamp is used to prevent the identical transactions. Only current time is required (Standard unit : us)
        // If the timestamp is considerably different from the current time, the transaction will be rejected.
        const timestamp = (new Date()).getTime() * 1000;
        // SCORE name that send transaction is “transfer”.
        const methodName = "transfer";
        // Enter receiving address and the token value.
        // You must enter the given key name("_to", "_value"). Otherwise, the transaction will be rejected.
        const params = {
            _to: MockData.WALLET_ADDRESS_2,
            _value: IconConverter.toHex(value)
        }
        
        //Enter transaction information
        const tokenTransactionBuilder = new CallTransactionBuilder();
        const transaction = tokenTransactionBuilder
            .nid(networkId)
            .from(walletAddress)
            .to(MockData.TOKEN_ADDRESS)
            .stepLimit(stepLimit)
            .timestamp(timestamp)
            .method(methodName)
            .params(params)
            .version(version)
            .build();        
        return transaction;
    }