Generic Contract Call

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If you have replaced your web3 provider with Fortmatic provider, nothing needs to be changed for web3 contract transactions to continue working. The following is an example on how to initiate a smart contract call.
Web3 Pre-1.0 Stable Versions
Web3 1.0 Beta Version
// Initialize provider
import Fortmatic from 'fortmatic';
import Web3 from 'web3';
​
const fm = new Fortmatic('YOUR_API_KEY');
window.web3 = new Web3(fm.getProvider());
​
// Get your contract ABI from compiled smart contract json
const contractAbi =  [{"constant": true,"inputs": [],"name": "name","outputs": [{"name": "","type": "string"}],"payable": false,"stateMutability": "view","type": "function"},{"constant": true,"inputs": [],"name": "getValue","outputs": [{"name": "","type": "string"}],"payable": false,"stateMutability": "view","type": "function"},{"constant": false,"inputs": [{"name": "_name","type": "string"}],"name": "setValue","outputs": [{"name": "","type": "string"}],"payable": false,"stateMutability": "nonpayable","type": "function"}];
​
// Create contract object
const contract = web3.eth.contract(contractAbi);
​
// Instantiate contract
const contractInstance = contract.at('0x4efA9a82bFE112a9174325561bcdD1c68044724c');
​
// Get user account wallet address first
web3.eth.getAccounts(function(error, accounts) {
  if (error) throw error;
  // Make the contract call.
  contractInstance.setValue.sendTransaction('Hello World', {from: accounts[0]}, function(error, txnHash) {
    if (error) throw error;
    console.log(txnHash);
  });
});
// Initialize provider
import Fortmatic from 'fortmatic';
import Web3 from 'web3';
​
const fm = new Fortmatic('YOUR_API_KEY');
window.web3 = new Web3(fm.getProvider());
​
// Get your contract ABI from compiled smart contract json
const contractAbi =  [{"constant": true,"inputs": [],"name": "name","outputs": [{"name": "","type": "string"}],"payable": false,"stateMutability": "view","type": "function"},{"constant": true,"inputs": [],"name": "getValue","outputs": [{"name": "","type": "string"}],"payable": false,"stateMutability": "view","type": "function"},{"constant": false,"inputs": [{"name": "_name","type": "string"}],"name": "setValue","outputs": [{"name": "","type": "string"}],"payable": false,"stateMutability": "nonpayable","type": "function"}];
​
// Create contract object
const contractAddress = '0x4efA9a82bFE112a9174325561bcdD1c68044724c';
​
// Instantiate contract
const contract = new web3.eth.Contract(contractAbi, contractAddress);
​
// Get user account wallet address first
web3.eth.getAccounts().then((accounts) => {
  // Make the contract call.
  contract.methods.setValue(
    'Hello World', 
  ).send({from: accounts[0]})
  .once('transactionHash', (hash) => { console.log(hash); })
  .once('receipt', (receipt) => { console.log(receipt); });
});
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