ERC777 Token Transfer Contracts

Run

npm install

to setup.

And after that, change node_modules/@openzeppelin/contracts/token/ERC777/ERC777.sol line33 to

IERC1820Registry constant internal _ERC1820_REGISTRY = IERC1820Registry(0x88887eD889e776bCBe2f0f9932EcFaBcDfCd1820);

Address of ERC1820 on Conflux is different from that of Ethereum.