ERC-2018 Clearable Token

StagnantERCcreated 2019-04-301 later proposal build on itrequires ERC-1996

Authors: Julio Faura, Fernando Paris, Daniel Lehrner

ERC-165 interface ids

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

ClearableToken 0x62001634

`0x73a33fbb`	`authorizeClearableTransferOperator(address)`
`0xb0aefc84`	`cancelTransfer(string)`
`0x5c6fa317`	`executeClearableTransfer(string)`
`0x213de662`	`isClearableTransferOperatorFor(address,address)`	view
`0x43e4a3ab`	`orderTransfer(string,address,uint256)`
`0x93f23ed4`	`orderTransferFrom(string,address,address,uint256)`
`0x42be29e4`	`processClearableTransfer(string)`
`0xfe1053b7`	`rejectClearableTransfer(string,string)`
`0x13f2aa1c`	`retrieveClearableTransferData(string)`	view
`0xa315dd4e`	`revokeClearableTransferOperator(address)`

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

`0xf5c8ec93e3e08415a23646e471f8b5d8ae8e86c018ed4152104a5c5e6c00131f`	`ClearableTransferOrdered(address,string,address,address,uint256)`
`0x42231b1e20e17b80e9409ef26f8768c018dcc6ec41c1cf6b5f28c36793625510`	`ClearableTransferInProcess(address,string)`
`0xe635bfa723ac9f8d0f8c108004cd5b007845d19cdfac3ff5cb1962ad7049611b`	`ClearableTransferExecuted(address,string)`
`0x4b36db2f7875ce7a391b8c167ef3f35dc323e515c23fddae20ea1ba9e27a516f`	`ClearableTransferRejected(address,string,string)`
`0x2cd69e99ace901bf5ab6903a195761bdf0a07453468d5dbbd77bcee0c0249999`	`ClearableTransferCancelled(address,string)`
`0x1a1966ae70aa611c0900d2f009f4275b70beef3538e93670f957e4e149c291ce`	`AuthorizedClearableTransferOperator(address,address)`
`0xb81c416e74cc5beae56c33629f0f70e9a68cf5574d5dfc3447859bf40d8c19e4`	`RevokedClearableTransferOperator(address,address)`

Proposals this one names in its requires field.

Later proposals that name this one in their requires field.