App.initContract('ContractName');
const myContract = await App.getContract('ContractName', '0x123...');
// myContract.methods.myMethod([param1[, param2[, ...]]]).call(options [, defaultBlock] [, callback])
// myContract.methods.myMethod([param1[, param2[, ...]]]).send(options[, callback])
App.deployContract('ContractName', ['arg1', 'arg2']);