User Story: Buy an option with an expirationDate GTE to some timestamp

[katelynsills]

Story

As a user, I want to buy an option and have my purchase be protected by offer safety. I want to be able to specify things that are important to me, such as that the option will not expire until after a specific timestamp. I don't want to have to specify things that are not important to me, such as the invitation handle for a particular option. (This use case also pertains to staking derivatives.)

Status

Currently, a user must specify the exact amount matching the option in order to buy it with offer safety. The user can be told of the exact amount by another user or a contract, but if they are not told, they cannot get offer safety.

Details

The test-coveredCall.js file is the best to look at for this use case. Currently, as of 2/5/2021, Dave must specify the optionAmount exactly, whereas he might actually only care that the expirationDate is after a timestamp, and that the strikePrice is under a certain amount, and the underlyingAssets are above a certain amount.

agoric-sdk/packages/zoe/test/unitTests/contracts/test-coveredCall.js

Line 494 in 559c5ed

want: { Asset: optionAmount },

Next Steps

Please see the Amount Patterns Implementation Plan issue