The XRP Ledger utilizes an account model. Unlike systems based on a UTXO
model, XRP Ledger accounts are first-class objects. This design choice
allows the XRP Ledger to offer rich functionality, including the ability
to own objects (offers, escrows, checks, signer lists) as well as other
advanced features, such as key rotation and configurable multi-signing
without needing to change a destination address.
The trade-off is that accounts must be stored on ledger. The XRP Ledger
applies reserve requirements, in XRP, to protect the shared global ledger
from growing excessively large as the result of spam or malicious usage.
Prior to this commit, accounts had been permanent objects; once created,
they could never be deleted.
This commit introduces a new amendment "DeletableAccounts" which, if
enabled, will allow account objects to be deleted by executing the new
"AccountDelete" transaction. Any funds remaining in the account will
be transferred to an account specified in the deletion transaction.
The amendment changes the mechanics of account creation; previously
a new account would have an initial sequence number of 1. Accounts
created after the amendment will have an initial sequence number that
is equal to the ledger in which the account was created.
Accounts can only be deleted if they are not associated with any
obligations (like RippleStates, Escrows, or PayChannels) and if the
current ledger sequence number exceeds the account's sequence number
by at least 256 so that, if recreated, the account can be protected
from transaction replay.
FIXES: #2527
* define custom docker image for travis-linux builds based on
package build image
* add macos builds
* add windows builds (currently allowed to fail)
* improve build and shell scripts as required for the CI envs
* add asio timer latency workaround
* omit several manual tests from TravisCI which cause memory exhaustion
This patch removes calls to several deprecated asio functions.
* `io_service::post` becomes `post` (free function)
* `io_service::work` becomes `executor_work_guard`
* `io_service::wrap` becomes `bind_executor`
* `get_io_context` becomes `get_executor` or `get_executor().context()`
This patch was tested with boost 1.69 and 1.70. The functions
`ripple::get_lowest_layer` and `beast::create_waitable_timer` are required to
handle a breaking difference between these versions. When rippled no longer
needs to support pre 1.70 boost versions, both of these functions may be
removed, and the waitable timer injections may also be removed.
Fixes: RIPD-1648
- use ExternalProject for snappy, lz4, SOCI, and sqlite3
- use FetchContent for NuDB
- update SOCI from 79e222e3c2278e6108137a2d26d3689418b37544 to
3a1f602b3021b925d38828e3ff95f9e7f8887ff7
- update lz4 from c10863b98e1503af90616ae99725ecd120265dfb to v1.8.2
- update sqlite3 from 3.21 to 3.24
- update snappy from b02bfa754ebf27921d8da3bd2517eab445b84ff9 to 1.1.7
- update NuDB from 00adc6a4f16679a376f40c967f77dfa544c179c1 to 1.0.0
Exclude several libraries from build when we are included in a
super-project (this is the case when someone only wants to use
xrpl_core). Force several target (deprecated) params to be cache
variables since they are now exposed as options.
Switch to target-oriented dependencies. Use imported targets for
dependencies (openssl, boost). Localize FindBoost to remove cmake
version dependence for latest boost support. Logically separate
"ripple-libpp" core sources and add install targets.
Add ninja build for msvc. Add two clang sanitizer builds. Misc script
changes to work with latest modernized cmake.
Some classes had virtual methods, but were missing a virtual
destructor.
Technically, every unit test that inherits from the Beast test suite
would get flagged by `-Wnon-virtual-dtor` but I did not think it would
be a great idea to go sprinkle a virtual destructor for every Ripple
test suite.
Removes unnecessary common link libs related to openssl, which we link
to explicitly using finder vars now. THis allows the generated XCode
project to link without error. Tested with CMake 3.9.0 and XCode 8.3.3.
if openssl is configured with compression support AND you link
to the static lib, you are going to need to link to zlib.
Fundamentally the CMake finder should take care of this (as
described in https://gitlab.kitware.com/cmake/cmake/issues/16885),
but we work around it here by adding zlib explicitly. Update
beast error test for OpenSSL 1.1.0
