snapshotFunctions.js

takeSnapshot = async () => {
  return new Promise((resolve, reject) => {
    web3.currentProvider.send(
      {
        jsonrpc: "2.0",
        method: "evm_snapshot",
        id: new Date().getTime(),
      },
      (err, snapshotId) => {
        if (err) {
          return reject(err);
        }
        return resolve(snapshotId);
      },
    );
  });
};

revertToSnapshot = async (id) => {
  return new Promise((resolve, reject) => {
    web3.currentProvider.send(
      {
        jsonrpc: "2.0",
        method: "evm_revert",
        params: [id],
        id: new Date().getTime(),
      },
      (err, result) => {
        if (err) {
          return reject(err);
        }
        return resolve(result);
      },
    );
  });
};