How to use the @cityofzion/neon-core/lib/u.str2hexstring function in @cityofzion/neon-core

return new Promise(async (resolve, reject) => {
            const amount = (this.pramsData.dynamicInvoke === 'true'  ? 500 : 0) + (this.pramsData.needsStorage === 'true' ? 400 : 0) + 90;
            const fromAddress = this.neon.wallet.accounts[0].address;
            let newTx = new tx.InvocationTransaction();
            // tslint:disable-next-line: no-bitwise
            const num = (this.pramsData.needsStorage === 'true' ? 1 : 0) | (this.pramsData.dynamicInvoke === 'true' ? 2 : 0) |
                        (this.pramsData.isPayable === 'true' ? 4 : 0);
            const sb = new ScriptBuilder();
            sb.emitPush(str2hexstring(this.pramsData.description))
                .emitPush(str2hexstring(this.pramsData.email))
                .emitPush(str2hexstring(this.pramsData.author))
                .emitPush(str2hexstring(this.pramsData.version))
                .emitPush(str2hexstring(this.pramsData.name))
                .emitPush(num)
                .emitPush(this.pramsData.returnType || 'ff00')
                .emitPush(this.pramsData.parameterList)
                .emitPush(this.pramsData.code)
                .emitSysCall('Neo.Contract.Create');
            try {
                newTx.script = sb.str;
            } catch (error) {
                reject(error);
            }
            try {
                newTx = await this.addFee(fromAddress, newTx, amount + parseFloat(this.pramsData.networkFee));
            } catch (error) {

return new Promise(async (resolve, reject) => {
            const amount = (this.pramsData.dynamicInvoke === 'true'  ? 500 : 0) + (this.pramsData.needsStorage === 'true' ? 400 : 0) + 90;
            const fromAddress = this.neon.wallet.accounts[0].address;
            let newTx = new tx.InvocationTransaction();
            // tslint:disable-next-line: no-bitwise
            const num = (this.pramsData.needsStorage === 'true' ? 1 : 0) | (this.pramsData.dynamicInvoke === 'true' ? 2 : 0) |
                        (this.pramsData.isPayable === 'true' ? 4 : 0);
            const sb = new ScriptBuilder();
            sb.emitPush(str2hexstring(this.pramsData.description))
                .emitPush(str2hexstring(this.pramsData.email))
                .emitPush(str2hexstring(this.pramsData.author))
                .emitPush(str2hexstring(this.pramsData.version))
                .emitPush(str2hexstring(this.pramsData.name))
                .emitPush(num)
                .emitPush(this.pramsData.returnType || 'ff00')
                .emitPush(this.pramsData.parameterList)
                .emitPush(this.pramsData.code)
                .emitSysCall('Neo.Contract.Create');
            try {
                newTx.script = sb.str;
            } catch (error) {
                reject(error);
            }
            try {
                newTx = await this.addFee(fromAddress, newTx, amount + parseFloat(this.pramsData.networkFee));
            } catch (error) {
                this.chrome.windowCallback({
                    error: ERRORS.INSUFFICIENT_FUNDS,
                    return: requestTarget.Deploy,

return new Promise(async (resolve, reject) => {
            const amount = (this.pramsData.dynamicInvoke === 'true'  ? 500 : 0) + (this.pramsData.needsStorage === 'true' ? 400 : 0) + 90;
            const fromAddress = this.neon.wallet.accounts[0].address;
            let newTx = new tx.InvocationTransaction();
            // tslint:disable-next-line: no-bitwise
            const num = (this.pramsData.needsStorage === 'true' ? 1 : 0) | (this.pramsData.dynamicInvoke === 'true' ? 2 : 0) |
                        (this.pramsData.isPayable === 'true' ? 4 : 0);
            const sb = new ScriptBuilder();
            sb.emitPush(str2hexstring(this.pramsData.description))
                .emitPush(str2hexstring(this.pramsData.email))
                .emitPush(str2hexstring(this.pramsData.author))
                .emitPush(str2hexstring(this.pramsData.version))
                .emitPush(str2hexstring(this.pramsData.name))
                .emitPush(num)
                .emitPush(this.pramsData.returnType || 'ff00')
                .emitPush(this.pramsData.parameterList)
                .emitPush(this.pramsData.code)
                .emitSysCall('Neo.Contract.Create');
            try {
                newTx.script = sb.str;
            } catch (error) {
                reject(error);
            }
            try {
                newTx = await this.addFee(fromAddress, newTx, amount + parseFloat(this.pramsData.networkFee));
            } catch (error) {
                this.chrome.windowCallback({

return new Promise(async (resolve, reject) => {
            const amount = (this.pramsData.dynamicInvoke === 'true'  ? 500 : 0) + (this.pramsData.needsStorage === 'true' ? 400 : 0) + 90;
            const fromAddress = this.neon.wallet.accounts[0].address;
            let newTx = new tx.InvocationTransaction();
            // tslint:disable-next-line: no-bitwise
            const num = (this.pramsData.needsStorage === 'true' ? 1 : 0) | (this.pramsData.dynamicInvoke === 'true' ? 2 : 0) |
                        (this.pramsData.isPayable === 'true' ? 4 : 0);
            const sb = new ScriptBuilder();
            sb.emitPush(str2hexstring(this.pramsData.description))
                .emitPush(str2hexstring(this.pramsData.email))
                .emitPush(str2hexstring(this.pramsData.author))
                .emitPush(str2hexstring(this.pramsData.version))
                .emitPush(str2hexstring(this.pramsData.name))
                .emitPush(num)
                .emitPush(this.pramsData.returnType || 'ff00')
                .emitPush(this.pramsData.parameterList)
                .emitPush(this.pramsData.code)
                .emitSysCall('Neo.Contract.Create');
            try {
                newTx.script = sb.str;
            } catch (error) {
                reject(error);
            }
            try {
                newTx = await this.addFee(fromAddress, newTx, amount + parseFloat(this.pramsData.networkFee));
            } catch (error) {
                this.chrome.windowCallback({
                    error: ERRORS.INSUFFICIENT_FUNDS,

return new Promise(async (resolve, reject) => {
            const amount = (this.pramsData.dynamicInvoke === 'true'  ? 500 : 0) + (this.pramsData.needsStorage === 'true' ? 400 : 0) + 90;
            const fromAddress = this.neon.wallet.accounts[0].address;
            let newTx = new tx.InvocationTransaction();
            // tslint:disable-next-line: no-bitwise
            const num = (this.pramsData.needsStorage === 'true' ? 1 : 0) | (this.pramsData.dynamicInvoke === 'true' ? 2 : 0) |
                        (this.pramsData.isPayable === 'true' ? 4 : 0);
            const sb = new ScriptBuilder();
            sb.emitPush(str2hexstring(this.pramsData.description))
                .emitPush(str2hexstring(this.pramsData.email))
                .emitPush(str2hexstring(this.pramsData.author))
                .emitPush(str2hexstring(this.pramsData.version))
                .emitPush(str2hexstring(this.pramsData.name))
                .emitPush(num)
                .emitPush(this.pramsData.returnType || 'ff00')
                .emitPush(this.pramsData.parameterList)
                .emitPush(this.pramsData.code)
                .emitSysCall('Neo.Contract.Create');
            try {
                newTx.script = sb.str;
            } catch (error) {
                reject(error);
            }
            try {
                newTx = await this.addFee(fromAddress, newTx, amount + parseFloat(this.pramsData.networkFee));