Estimating gas for a transaction

estimatingGas.js

    // Get the estimated gas from the adopt method
    try {
      methodGasPrice = await this.contract.methods.adopt(adoptNum).estimateGas({
        value: price,
        from: account
      });
    } catch (err) {
      console.log("ERROR Method Gas Price");
    }

    try {
      currentGasPrice = await this.web3.eth.getGasPrice();
    } catch (err) {
      console.log("ERROR Current Gas Price");
    }

    // Buffer gas with a value that makes sense for your project
    // has pros and cons - always do your own research
    const sendTransactionData = {
      // increase the gas limit  
      gas: parseInt(1.13 * methodGasPrice),
      // increase the gas price  
      gasPrice: parseInt(1.13 * currentGasPrice),
      from: account,
      value: price
    };

NOTE:
This is WIP code from our dev server. Always do your own testing :)