ERC-2019 Fundable Token

StagnantERCcreated 2019-05-101 later proposal build on itrequires ERC-20

Authors: Fernando Paris, Julio Faura, Daniel Lehrner

ERC-165 interface ids

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

IFundable 0xa5a85b89

`0xf72d4b98`	`authorizeFundOperator(address)`
`0x1a17129f`	`cancelFund(string)`
`0xba311a98`	`executeFund(string)`
`0xe8ca5440`	`isFundOperatorFor(address,address)`	view
`0xecc5f13b`	`orderFund(string,uint256,string)`
`0xc4261983`	`orderFundFrom(string,address,uint256,string)`
`0x2a8133c0`	`processFund(string)`
`0x3d801f4c`	`rejectFund(string,string)`
`0xe3bd54ca`	`retrieveFundData(address,string)`	view
`0xc636dca8`	`revokeFundOperator(address)`

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

`0x6cce80fbbfac828c9fe33395ce97a35bc3265658d03e08450948d74b8b631fe8`	`FundOrdered(address,string,address,uint256,string)`
`0x3de82fd2702b9ae25dcb66d83fc775b6589ff6e97809e534365ac8b446c3e060`	`FundInProcess(address,string)`
`0x232a328420d656edf66408b7ac3e98dcaee9c42d4ea4680fb015bcef88d27cd5`	`FundExecuted(address,string)`
`0x7d98c1d4da4fd99e592615312b43ccd06f5a505fac37bf6193dc24c7b1901f7e`	`FundRejected(address,string,string)`
`0xdcaddc7c1d0d4ef9c57a3a0b68a243272a7ece5083bcbcfdf148608e6f821553`	`FundCancelled(address,string)`
`0x2d8b4b044106e8721fd54b8cd329847c3f071ab38c6bcb5a512c590851f97d72`	`FundOperatorAuthorized(address,address)`
`0xeedf36943068c8f5dec64a6993b97455d335c88e4f6ad67ecb78b20ae6f0c5ce`	`FundOperatorRevoked(address,address)`

Proposals this one names in its requires field.

Later proposals that name this one in their requires field.