// Blockchain
const node_config = {
  blockchain,   // "codex"
  httpEndpoint: node_url,
  chainId
}
const res = await window.mathExtension.getIdentity(node_config);
console.log(res.accounts);

// Math Signature Provider
const signProvider = window.mathExtension.codexSignProvider();
// Node config
const node_config = {
  blockchain,   // "codex"
  httpEndpoint: node_url,
  chainId,
  signProvider  // window.mathExtension.codexSignProvider()
}
// transfer
const token = await Codex({
                          signProvider,
                          blockchain, 
                          httpEndpoint, 
                          chainId
                        }).contract('codex.token');
const res = await token.transfer(from, to, quantity, memo);
console.log(res);