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
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// Initialize provider
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import Fortmatic from 'fortmatic';
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import Web3 from 'web3';
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​
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const fm = new Fortmatic('YOUR_API_KEY');
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window.web3 = new Web3(fm.getProvider());
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​
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// Get your contract ABI from compiled smart contract json
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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"}];
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​
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// Create contract object
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const contract = web3.eth.contract(contractAbi);
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​
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// Instantiate contract
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const contractInstance = contract.at('0x4efA9a82bFE112a9174325561bcdD1c68044724c');
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​
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// Get user account wallet address first
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web3.eth.getAccounts(function(error, accounts) {
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  if (error) throw error;
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  // Make the contract call.
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  contractInstance.setValue.sendTransaction('Hello World', {from: accounts[0]}, function(error, txnHash) {
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    if (error) throw error;
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    console.log(txnHash);
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  });
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});
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// Initialize provider
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import Fortmatic from 'fortmatic';
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import Web3 from 'web3';
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​
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const fm = new Fortmatic('YOUR_API_KEY');
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window.web3 = new Web3(fm.getProvider());
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​
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// Get your contract ABI from compiled smart contract json
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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"}];
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​
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// Create contract object
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const contractAddress = '0x4efA9a82bFE112a9174325561bcdD1c68044724c';
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​
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// Instantiate contract
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const contract = new web3.eth.Contract(contractAbi, contractAddress);
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​
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// Get user account wallet address first
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web3.eth.getAccounts().then((accounts) => {
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  // Make the contract call.
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  contract.methods.setValue(
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    'Hello World', 
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  ).send({from: accounts[0]})
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  .once('transactionHash', (hash) => { console.log(hash); })
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  .once('receipt', (receipt) => { console.log(receipt); });
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});
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