mirror of
https://github.com/XRPLF/rippled.git
synced 2025-12-06 17:27:55 +00:00
9920037d13
- Cleaned up some of the `LEDGER_ENTRY` macros by eliding unnecessary parameters. - Define the transaction privileges in one place (InvariantCheck.cpp). - Give `EscrowFinish` the `mayAuthorizeMPT` privilege. - Rename the test helper `expectLine` to `expectHolding` since it handles both trust lines and MPTs. - Restructure the ""pseudo-account has 2 pseudo-account fields set" invariant test to loop over all defined pseudo-account fields. - Fix `operator<<` for `PrettyAmount` to handle `MPTIssue`s. - Add enforcement of the `AccountRootsDeletedClean` invariant if SAV is enabled, and clarify the comment for the pseudo-account field check. - Delete the 100% redundant `ttMPTOKEN_ISSUANCE_SET` check in `ValidMPTIssuance`.
protocol
Classes and functions for handling data and values associated with the XRP Ledger protocol.
Serialized Objects
Objects transmitted over the network must be serialized into a canonical format. The prefix "ST" refers to classes that deal with the serialized format.
The term "Tx" or "tx" is an abbreviation for "Transaction", a commonly occurring object type.
Optional Fields
Our serialized fields have some "type magic" to make optional fields easier to read:
- The operation
x[sfFoo]means "return the value of 'Foo' if it exists, or the default value if it doesn't." - The operation
x[~sfFoo]means "return the value of 'Foo' if it exists, or nothing if it doesn't." This usage of the tilde/bitwise NOT operator is not standard outside of therippledcodebase.- As a consequence of this,
x[~sfFoo] = y[~sfFoo]assigns the value of Foo from y to x, including omitting Foo from x if it doesn't exist in y.
- As a consequence of this,
Typically, for things that are guaranteed to exist, you use
x[sfFoo] and avoid having to deal with a container that may
or may not hold a value. For things not guaranteed to exist,
you use x[~sfFoo] because you want such a container. It
avoids having to look something up twice, once just to see if
it exists and a second time to get/set its value.
(Real example)
The source of this "type magic" is in SField.h.