produce
produce: (Anonymous function) & object & object & object = Object.assign(// tslint:disable-next-line:max-line-length// tslint:disable-next-line:variable-name( txParams?: W3.TX.TxParams, privateKey?: string): Promise<W3.TX.TransactionResult> => {if (!privateKey) {return new Promise((resolve, reject) => {this._instance.produce( txParams || this._sendParams).then((res) => resolve(res)).catch((err) => reject(err));});} else {// tslint:disable-next-line:max-line-lengthreturn this.w3.sendSignedTransaction(this.address, privateKey, this._instance.produce.request().params[0].data, txParams || this._sendParams, undefined).then(txHash => {return this.waitTransactionReceipt(txHash);});}},{// tslint:disable-next-line:max-line-length// tslint:disable-next-line:variable-namesendTransaction: Object.assign(( txParams?: W3.TX.TxParams): Promise<string> => {return new Promise((resolve, reject) => {this._instance.produce.sendTransaction( txParams || this._sendParams).then((res) => resolve(res)).catch((err) => reject(err));});},{// tslint:disable-next-line:max-line-length// tslint:disable-next-line:variable-namesendSigned: ( privateKey: string, txParams?: W3.TX.TxParams, nonce?: number): Promise<string> => {// tslint:disable-next-line:max-line-lengthreturn this.w3.sendSignedTransaction(this.address, privateKey, this._instance.produce.request().params[0].data, txParams || this._sendParams, nonce);}})},{// tslint:disable-next-line:max-line-length// tslint:disable-next-line:variable-namedata: (): Promise<string> => {return new Promise((resolve, reject) => {resolve(this._instance.produce.request().params[0].data);});}},{// tslint:disable-next-line:max-line-length// tslint:disable-next-line:variable-nameestimateGas: (): Promise<number> => {return new Promise((resolve, reject) => {this._instance.produce.estimateGas().then((g) => resolve(g));});}})
by 
StorageFactory API