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22a375a5f4
Add an amendment to allow gateways to set a "tick size" for assets they issue. There are no changes unless the amendment is enabled (since the tick size option cannot be set). With the amendment enabled: AccountSet transactions may set a "TickSize" parameter. Legal values are 0 and 3-15 inclusive. Zero removes the setting. 3-15 allow that many decimal digits of precision in the pricing of offers for assets issued by this account. For asset pairs with XRP, the tick size imposed, if any, is the tick size of the issuer of the non-XRP asset. For asset pairs without XRP, the tick size imposed, if any, is the smaller of the two issuer's configured tick sizes. The tick size is imposed by rounding the offer quality down to nearest tick and recomputing the non-critical side of the offer. For a buy, the amount offered is rounded down. For a sell, the amount charged is rounded up. Gateways must enable a TickSize on their account for this feature to benefit them. The primary expected benefit is the elimination of bots fighting over the tip of the order book. This means: - Quicker price discovery as outpricing someone by a microscopic amount is made impossible. Currently bots can spend hours outbidding each other with no significant price movement. - A reduction in offer creation and cancellation spam. - More offers left on the books as priority means something when you can't outbid by a microscopic amount.
169 lines
7.9 KiB
C++
169 lines
7.9 KiB
C++
//------------------------------------------------------------------------------
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/*
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This file is part of rippled: https://github.com/ripple/rippled
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Copyright (c) 2012, 2013 Ripple Labs Inc.
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Permission to use, copy, modify, and/or distribute this software for any
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purpose with or without fee is hereby granted, provided that the above
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copyright notice and this permission notice appear in all copies.
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THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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ANY SPECIAL , DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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//==============================================================================
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#include <BeastConfig.h>
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#include <ripple/protocol/LedgerFormats.h>
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namespace ripple {
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LedgerFormats::LedgerFormats ()
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{
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add ("AccountRoot", ltACCOUNT_ROOT)
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<< SOElement (sfAccount, SOE_REQUIRED)
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<< SOElement (sfSequence, SOE_REQUIRED)
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<< SOElement (sfBalance, SOE_REQUIRED)
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<< SOElement (sfOwnerCount, SOE_REQUIRED)
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<< SOElement (sfPreviousTxnID, SOE_REQUIRED)
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<< SOElement (sfPreviousTxnLgrSeq, SOE_REQUIRED)
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<< SOElement (sfAccountTxnID, SOE_OPTIONAL)
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<< SOElement (sfRegularKey, SOE_OPTIONAL)
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<< SOElement (sfEmailHash, SOE_OPTIONAL)
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<< SOElement (sfWalletLocator, SOE_OPTIONAL)
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<< SOElement (sfWalletSize, SOE_OPTIONAL)
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<< SOElement (sfMessageKey, SOE_OPTIONAL)
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<< SOElement (sfTransferRate, SOE_OPTIONAL)
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<< SOElement (sfDomain, SOE_OPTIONAL)
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<< SOElement (sfTickSize, SOE_OPTIONAL)
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;
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add ("DirectoryNode", ltDIR_NODE)
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<< SOElement (sfOwner, SOE_OPTIONAL) // for owner directories
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<< SOElement (sfTakerPaysCurrency, SOE_OPTIONAL) // for order book directories
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<< SOElement (sfTakerPaysIssuer, SOE_OPTIONAL) // for order book directories
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<< SOElement (sfTakerGetsCurrency, SOE_OPTIONAL) // for order book directories
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<< SOElement (sfTakerGetsIssuer, SOE_OPTIONAL) // for order book directories
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<< SOElement (sfExchangeRate, SOE_OPTIONAL) // for order book directories
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<< SOElement (sfIndexes, SOE_REQUIRED)
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<< SOElement (sfRootIndex, SOE_REQUIRED)
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<< SOElement (sfIndexNext, SOE_OPTIONAL)
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<< SOElement (sfIndexPrevious, SOE_OPTIONAL)
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;
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add ("Offer", ltOFFER)
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<< SOElement (sfAccount, SOE_REQUIRED)
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<< SOElement (sfSequence, SOE_REQUIRED)
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<< SOElement (sfTakerPays, SOE_REQUIRED)
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<< SOElement (sfTakerGets, SOE_REQUIRED)
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<< SOElement (sfBookDirectory, SOE_REQUIRED)
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<< SOElement (sfBookNode, SOE_REQUIRED)
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<< SOElement (sfOwnerNode, SOE_REQUIRED)
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<< SOElement (sfPreviousTxnID, SOE_REQUIRED)
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<< SOElement (sfPreviousTxnLgrSeq, SOE_REQUIRED)
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<< SOElement (sfExpiration, SOE_OPTIONAL)
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;
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add ("RippleState", ltRIPPLE_STATE)
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<< SOElement (sfBalance, SOE_REQUIRED)
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<< SOElement (sfLowLimit, SOE_REQUIRED)
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<< SOElement (sfHighLimit, SOE_REQUIRED)
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<< SOElement (sfPreviousTxnID, SOE_REQUIRED)
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<< SOElement (sfPreviousTxnLgrSeq, SOE_REQUIRED)
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<< SOElement (sfLowNode, SOE_OPTIONAL)
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<< SOElement (sfLowQualityIn, SOE_OPTIONAL)
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<< SOElement (sfLowQualityOut, SOE_OPTIONAL)
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<< SOElement (sfHighNode, SOE_OPTIONAL)
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<< SOElement (sfHighQualityIn, SOE_OPTIONAL)
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<< SOElement (sfHighQualityOut, SOE_OPTIONAL)
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;
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add ("SuspendedPayment", ltSUSPAY) <<
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SOElement (sfAccount, SOE_REQUIRED) <<
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SOElement (sfDestination, SOE_REQUIRED) <<
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SOElement (sfAmount, SOE_REQUIRED) <<
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SOElement (sfCondition, SOE_OPTIONAL) <<
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SOElement (sfCancelAfter, SOE_OPTIONAL) <<
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SOElement (sfFinishAfter, SOE_OPTIONAL) <<
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SOElement (sfSourceTag, SOE_OPTIONAL) <<
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SOElement (sfDestinationTag, SOE_OPTIONAL) <<
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SOElement (sfOwnerNode, SOE_REQUIRED) <<
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SOElement (sfPreviousTxnID, SOE_REQUIRED) <<
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SOElement (sfPreviousTxnLgrSeq, SOE_REQUIRED);
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add ("LedgerHashes", ltLEDGER_HASHES)
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<< SOElement (sfFirstLedgerSequence, SOE_OPTIONAL) // Remove if we do a ledger restart
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<< SOElement (sfLastLedgerSequence, SOE_OPTIONAL)
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<< SOElement (sfHashes, SOE_REQUIRED)
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;
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add ("Amendments", ltAMENDMENTS)
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<< SOElement (sfAmendments, SOE_OPTIONAL) // Enabled
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<< SOElement (sfMajorities, SOE_OPTIONAL)
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;
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add ("FeeSettings", ltFEE_SETTINGS)
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<< SOElement (sfBaseFee, SOE_REQUIRED)
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<< SOElement (sfReferenceFeeUnits, SOE_REQUIRED)
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<< SOElement (sfReserveBase, SOE_REQUIRED)
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<< SOElement (sfReserveIncrement, SOE_REQUIRED)
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;
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add ("Ticket", ltTICKET)
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<< SOElement (sfAccount, SOE_REQUIRED)
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<< SOElement (sfSequence, SOE_REQUIRED)
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<< SOElement (sfOwnerNode, SOE_REQUIRED)
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<< SOElement (sfTarget, SOE_OPTIONAL)
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<< SOElement (sfExpiration, SOE_OPTIONAL)
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;
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// All fields are SOE_REQUIRED because there is always a
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// SignerEntries. If there are no SignerEntries the node is deleted.
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add ("SignerList", ltSIGNER_LIST)
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<< SOElement (sfOwnerNode, SOE_REQUIRED)
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<< SOElement (sfSignerQuorum, SOE_REQUIRED)
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<< SOElement (sfSignerEntries, SOE_REQUIRED)
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<< SOElement (sfSignerListID, SOE_REQUIRED)
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<< SOElement (sfPreviousTxnID, SOE_REQUIRED)
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<< SOElement (sfPreviousTxnLgrSeq, SOE_REQUIRED)
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;
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add ("PayChannel", ltPAYCHAN)
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<< SOElement (sfAccount, SOE_REQUIRED)
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<< SOElement (sfDestination, SOE_REQUIRED)
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<< SOElement (sfAmount, SOE_REQUIRED)
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<< SOElement (sfBalance, SOE_REQUIRED)
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<< SOElement (sfPublicKey, SOE_REQUIRED)
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<< SOElement (sfSettleDelay, SOE_REQUIRED)
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<< SOElement (sfExpiration, SOE_OPTIONAL)
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<< SOElement (sfCancelAfter, SOE_OPTIONAL)
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<< SOElement (sfSourceTag, SOE_OPTIONAL)
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<< SOElement (sfDestinationTag, SOE_OPTIONAL)
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<< SOElement (sfOwnerNode, SOE_REQUIRED)
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<< SOElement (sfPreviousTxnID, SOE_REQUIRED)
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<< SOElement (sfPreviousTxnLgrSeq, SOE_REQUIRED)
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;
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}
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void LedgerFormats::addCommonFields (Item& item)
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{
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item
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<< SOElement(sfLedgerIndex, SOE_OPTIONAL)
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<< SOElement(sfLedgerEntryType, SOE_REQUIRED)
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<< SOElement(sfFlags, SOE_REQUIRED)
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;
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}
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LedgerFormats const&
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LedgerFormats::getInstance ()
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{
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static LedgerFormats instance;
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return instance;
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}
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} // ripple
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