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| Original file line number | Diff line number | Diff line change |
|---|---|---|
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| //------------------------------------------------------------------------------ | ||
| /* | ||
| This file is part of rippled: https://github.com/ripple/rippled | ||
| Copyright (c) 2023 Ripple Labs Inc. | ||
| Permission to use, copy, modify, and/or distribute this software for any | ||
| purpose with or without fee is hereby granted, provided that the above | ||
| copyright notice and this permission notice appear in all copies. | ||
| THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | ||
| WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | ||
| MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR | ||
| ANY SPECIAL , DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | ||
| WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | ||
| ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | ||
| OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | ||
| */ | ||
| //============================================================================== | ||
|
|
||
| #include <ripple/app/tx/impl/DID.h> | ||
|
|
||
| #include <ripple/basics/Log.h> | ||
| #include <ripple/ledger/ApplyView.h> | ||
| #include <ripple/ledger/View.h> | ||
| #include <ripple/protocol/Feature.h> | ||
| #include <ripple/protocol/Indexes.h> | ||
| #include <ripple/protocol/TxFlags.h> | ||
| #include <ripple/protocol/st.h> | ||
|
|
||
| namespace ripple { | ||
|
|
||
| /* | ||
| DID | ||
| ====== | ||
| Decentralized Identifiers (DIDs) are a new type of identifier that enable | ||
| verifiable, self-sovereign digital identity and are designed to be | ||
| compatible with any distributed ledger or network. This implementation | ||
| conforms to the requirements specified in the DID v1.0 specification | ||
| currently recommended by the W3C Credentials Community Group | ||
| (https://www.w3.org/TR/did-core/). | ||
| */ | ||
|
|
||
| //------------------------------------------------------------------------------ | ||
|
|
||
| NotTEC | ||
| DIDSet::preflight(PreflightContext const& ctx) | ||
| { | ||
| if (!ctx.rules.enabled(featureDID)) | ||
| return temDISABLED; | ||
|
|
||
| if (ctx.tx.getFlags() & tfUniversalMask) | ||
| return temINVALID_FLAG; | ||
|
|
||
| if (auto const ret = preflight1(ctx); !isTesSuccess(ret)) | ||
| return ret; | ||
|
|
||
| if (!ctx.tx.isFieldPresent(sfURI) && | ||
| !ctx.tx.isFieldPresent(sfDIDDocument) && !ctx.tx.isFieldPresent(sfData)) | ||
| return temEMPTY_DID; | ||
|
|
||
| if (ctx.tx.isFieldPresent(sfURI) && ctx.tx[sfURI].empty() && | ||
| ctx.tx.isFieldPresent(sfDIDDocument) && ctx.tx[sfDIDDocument].empty() && | ||
| ctx.tx.isFieldPresent(sfData) && ctx.tx[sfData].empty()) | ||
| return temEMPTY_DID; | ||
|
|
||
| auto isTooLong = [&](auto const& sField, std::size_t length) -> bool { | ||
| if (auto field = ctx.tx[~sField]) | ||
| return field->length() > length; | ||
| return false; | ||
| }; | ||
|
|
||
| if (isTooLong(sfURI, maxDIDURILength) || | ||
| isTooLong(sfDIDDocument, maxDIDDocumentLength) || | ||
| isTooLong(sfData, maxDIDAttestationLength)) | ||
| return temMALFORMED; | ||
|
|
||
| return preflight2(ctx); | ||
| } | ||
|
|
||
| TER | ||
| addSLE( | ||
| ApplyContext& ctx, | ||
| std::shared_ptr<SLE> const& sle, | ||
| AccountID const& owner) | ||
| { | ||
| auto const sleAccount = ctx.view().peek(keylet::account(owner)); | ||
| if (!sleAccount) | ||
| return tefINTERNAL; | ||
|
|
||
| // Check reserve availability for new object creation | ||
| { | ||
| auto const balance = STAmount((*sleAccount)[sfBalance]).xrp(); | ||
| auto const reserve = | ||
| ctx.view().fees().accountReserve((*sleAccount)[sfOwnerCount] + 1); | ||
|
|
||
| if (balance < reserve) | ||
| return tecINSUFFICIENT_RESERVE; | ||
| } | ||
|
|
||
| // Add ledger object to ledger | ||
| ctx.view().insert(sle); | ||
|
|
||
| // Add ledger object to owner's page | ||
| { | ||
| auto page = ctx.view().dirInsert( | ||
| keylet::ownerDir(owner), sle->key(), describeOwnerDir(owner)); | ||
| if (!page) | ||
| return tecDIR_FULL; | ||
| (*sle)[sfOwnerNode] = *page; | ||
| } | ||
| adjustOwnerCount(ctx.view(), sleAccount, 1, ctx.journal); | ||
| ctx.view().update(sleAccount); | ||
|
|
||
| return tesSUCCESS; | ||
| } | ||
|
|
||
| TER | ||
| DIDSet::doApply() | ||
| { | ||
| // Edit ledger object if it already exists | ||
| Keylet const didKeylet = keylet::did(account_); | ||
| if (auto const sleDID = ctx_.view().peek(didKeylet)) | ||
| { | ||
| auto update = [&](auto const& sField) { | ||
| if (auto const field = ctx_.tx[~sField]) | ||
| { | ||
| if (field->empty()) | ||
| { | ||
| sleDID->makeFieldAbsent(sField); | ||
| } | ||
| else | ||
| { | ||
| (*sleDID)[sField] = *field; | ||
| } | ||
| } | ||
| }; | ||
| update(sfURI); | ||
| update(sfDIDDocument); | ||
| update(sfData); | ||
|
|
||
| if (!sleDID->isFieldPresent(sfURI) && | ||
| !sleDID->isFieldPresent(sfDIDDocument) && | ||
| !sleDID->isFieldPresent(sfData)) | ||
| { | ||
| return tecEMPTY_DID; | ||
| } | ||
| ctx_.view().update(sleDID); | ||
| return tesSUCCESS; | ||
| } | ||
|
|
||
| // Create new ledger object otherwise | ||
| auto const sleDID = std::make_shared<SLE>(didKeylet); | ||
| (*sleDID)[sfAccount] = account_; | ||
|
|
||
| auto set = [&](auto const& sField) { | ||
| if (auto const field = ctx_.tx[~sField]; field && !field->empty()) | ||
| (*sleDID)[sField] = *field; | ||
| }; | ||
|
|
||
| set(sfURI); | ||
| set(sfDIDDocument); | ||
| set(sfData); | ||
|
|
||
| return addSLE(ctx_, sleDID, account_); | ||
| } | ||
|
|
||
| NotTEC | ||
| DIDDelete::preflight(PreflightContext const& ctx) | ||
| { | ||
| if (!ctx.rules.enabled(featureDID)) | ||
| return temDISABLED; | ||
|
|
||
| if (ctx.tx.getFlags() & tfUniversalMask) | ||
| return temINVALID_FLAG; | ||
|
|
||
| if (auto const ret = preflight1(ctx); !isTesSuccess(ret)) | ||
| return ret; | ||
|
|
||
| return preflight2(ctx); | ||
| } | ||
|
|
||
| TER | ||
| DIDDelete::deleteSLE(ApplyContext& ctx, Keylet sleKeylet, AccountID const owner) | ||
| { | ||
| auto const sle = ctx.view().peek(sleKeylet); | ||
| if (!sle) | ||
| return tecNO_ENTRY; | ||
|
|
||
| return DIDDelete::deleteSLE(ctx.view(), sle, owner, ctx.journal); | ||
| } | ||
|
|
||
| TER | ||
| DIDDelete::deleteSLE( | ||
| ApplyView& view, | ||
| std::shared_ptr<SLE> sle, | ||
| AccountID const owner, | ||
| beast::Journal j) | ||
| { | ||
| // Remove object from owner directory | ||
| if (!view.dirRemove( | ||
| keylet::ownerDir(owner), (*sle)[sfOwnerNode], sle->key(), true)) | ||
| { | ||
| JLOG(j.fatal()) << "Unable to delete DID Token from owner."; | ||
| return tefBAD_LEDGER; | ||
| } | ||
|
|
||
| auto const sleOwner = view.peek(keylet::account(owner)); | ||
| if (!sleOwner) | ||
| return tecINTERNAL; | ||
|
|
||
| adjustOwnerCount(view, sleOwner, -1, j); | ||
| view.update(sleOwner); | ||
|
|
||
| // Remove object from ledger | ||
| view.erase(sle); | ||
| return tesSUCCESS; | ||
| } | ||
|
|
||
| TER | ||
| DIDDelete::doApply() | ||
| { | ||
| return deleteSLE(ctx_, keylet::did(account_), account_); | ||
| } | ||
|
|
||
| } // namespace ripple |
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