xls: 60 title: Default AutoBridge description: Use autobridging in IOU-IOU Payment transactions author: tequ (@tequdev) created: 2024-02-05 status: Stagnant category: Amendment
Abstract¶
Currently, if the Path field is not specified in an IOU-IOU Payment transaction, only direct pairs of two currencies are used internally. This proposal would change this default behavior to use IOU-XRP-IOU as well as OfferCreate transaction's.
Changes¶
If the Path field is unspecified in the IOU_A->IOU_B Payment transaction, the path through IOU_A/XRP and IOU_B/XRP is used in addition to the IOU_A/IOU_B path.
If existing transaction types or future transaction types to be implemented are similarly cross-currency transactions, it will be possible to use bridge paths in addition to direct paths by default.
Technical¶
Add an additional path with XRP as the intermediate between two currencies to in flow() method in Flow.cpp when defaultPaths=true.
Use XRP-mediated paths to the paths under the following conditions:
- Path is not specified
- SendMax is set.
- The issuer and currency of Amount and SendMax are different.
Payment transaction¶
If the Path field is not specified and the SendMax field is set, the transaction will use the XRP-mediated path.
No impact if the NoRippleDirect flag is set.
OfferCreate transaction¶
No impact as Path is always set.
CheckCash transaction¶
(using flow())
No impact as it only processes when the fields corresponding to Amount and SendMax are the same.
If future amendments allow cross-currency checks, composite paths will be available.
XChainBridge transaction¶
(using flow())
No impact as SendMax is processed as null.
PathFind command¶
(using flow()) No impact as DefaultPaths is false.