ERC-777 Token Standard

FinalERCcreated 2017-11-201 later proposal build on itrequires ERC-1820

Authors: Jacques Dafflon, Jordi Baylina, Thomas Shababi

ERC-165 interface ids

Computed here as the XOR of the selectors each interface defines.

ERC777Token 0xe58e113c

`0x959b8c3f`	`authorizeOperator(address)`
`0x70a08231`	`balanceOf(address)`	view
`0xfe9d9303`	`burn(uint256,bytes)`
`0x06e48538`	`defaultOperators()`	view
`0x556f0dc7`	`granularity()`	view
`0xd95b6371`	`isOperatorFor(address,address)`	view
`0x06fdde03`	`name()`	view
`0xfc673c4f`	`operatorBurn(address,uint256,bytes,bytes)`
`0x62ad1b83`	`operatorSend(address,address,uint256,bytes,bytes)`
`0xfad8b32a`	`revokeOperator(address)`
`0x9bd9bbc6`	`send(address,uint256,bytes)`
`0x95d89b41`	`symbol()`	view
`0x18160ddd`	`totalSupply()`	view

Topic0 is the keccak256 hash of the signature, which is what a log filter matches on.

`0x06b541ddaa720db2b10a4d0cdac39b8d360425fc073085fac19bc82614677987`	`Sent(address,address,address,uint256,bytes,bytes)`
`0x2fe5be0146f74c5bce36c0b80911af6c7d86ff27e89d5cfa61fc681327954e5d`	`Minted(address,address,uint256,bytes,bytes)`
`0xa78a9be3a7b862d26933ad85fb11d80ef66b8f972d7cbba06621d583943a4098`	`Burned(address,address,uint256,bytes,bytes)`
`0xf4caeb2d6ca8932a215a353d0703c326ec2d81fc68170f320eb2ab49e9df61f9`	`AuthorizedOperator(address,address)`
`0x50546e66e5f44d728365dc3908c63bc5cfeeab470722c1677e3073a6ac294aa1`	`RevokedOperator(address,address)`

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Later proposals that name this one in their requires field.