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0g-chain/internal/x/paychan
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rhuairahrighairigh 60d5a03bb1 print out update from get pachan command
2018-09-03 16:38:51 -04:00
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client print out update from get pachan command 2018-09-03 16:38:51 -04:00
doc.go add pkg doc file 2018-07-09 19:50:59 +01:00
endblocker_test.go print out update from get pachan command 2018-09-03 16:38:51 -04:00
endblocker.go add usage instructions 2018-09-01 22:57:42 -04:00
handler.go add commands 2018-09-01 16:41:40 -04:00
keeper_test.go add usage instructions 2018-09-01 22:57:42 -04:00
keeper.go print out update from get pachan command 2018-09-03 16:38:51 -04:00
README.md print out update from get pachan command 2018-09-03 16:38:51 -04:00
test_common.go add usage instructions 2018-09-01 22:57:42 -04:00
types_test.go add validation and signature checks 2018-09-01 13:16:56 -04:00
types.go print out update from get pachan command 2018-09-03 16:38:51 -04:00
wire.go add usage instructions 2018-09-01 22:57:42 -04:00

README.md

Unidrectional Payment Channels

This module implements simple but feature complete unidirectional payment channels. Channels can be opened by a sender and closed immediately by the receiver, or by the sender subject to a dispute period. There are no top-ups or partial withdrawals (yet). Channels support multiple currencies.

Note: This module is still a bit rough around the edges. More feature planned. More test cases needed.

Usage

Create a channel

kvcli paychan create --from <your account name> --to <receivers address> --amount 100KVA --chain-id <your chain ID>

Send an off-chain payment

Send a payment for 10 KVA.

kvcli paychan pay --from <your account name> --sen-amt 90KVA --rec-amt 10KVA --chan-id <ID of channel> --filename payment.json --chain-id <your chain ID>

Send the file payment.json to your receiver. Then they run the following to verify.

kvcli paychan verify --filename payment.json

Close a channel

The receiver can close immediately at any time.

kvcli paychan submit --from <receiver's account name> --payment payment.json --chain-id <your chain ID>

The sender can submit a close request, causing the channel will close automatically after a dispute period. During this period a receiver can still close immediately.

kvcli paychan submit --from <receiver's account name> --payment payment.json --chain-id <your chain ID>

Note: The dispute period on the testnet is 30 seconds for ease of testing.

Get info on a channel

kvcli get --chan-id <ID of channel>

This will print out a channel, if it exists, and any submitted close requests.

TODOs

  • in code TODOs
  • Tidy up - method descriptions, heading comments, remove uneccessary comments, README/docs
  • Find a better name for Queue - clarify distinction between int slice and abstract queue concept
  • write some sort of integration test
    • possible bug in submitting same update repeatedly
  • find nicer name for payout
  • add Gas usage
  • add tags (return channel id on creation)
  • refactor cmds to be able to test them, then test them
    • verify doesn’t throw json parsing error on invalid json
    • can’t submit an update from an unitialised account
    • pay without a --from returns confusing error
  • use custom errors instead of using sdk.ErrInternal
  • split off signatures from update as with txs/msgs - testing easier, code easier to use, doesn't store sigs unecessarily on chain
  • consider removing pubKey from UpdateSignature - instead let channel module access accountMapper
  • refactor queue into one object
  • remove printout during tests caused by mock app initialisation