Start adding transaction layouts, flags, and fields

(Does not compile)

include/xrpl/protocol/LedgerFormats.h

@@ -194,6 +194,11 @@ enum LedgerSpecificFlags {
 
     // ltVAULT
     lsfVaultPrivate = 0x00010000,
+
+    // ltLOAN
+    lsfLoanDefault = 0x00010000,
+    lsfLoanImpaired = 0x00020000,
+    lsfLoanOverpayment = 0x00040000, // True, loan allows overpayments
 };
 
 //------------------------------------------------------------------------------

include/xrpl/protocol/TxFlags.h

@@ -230,6 +230,11 @@ constexpr std::uint32_t const tfVaultPrivate               = 0x00010000;
 static_assert(tfVaultPrivate == lsfVaultPrivate);
 constexpr std::uint32_t const tfVaultShareNonTransferable  = 0x00020000;
 constexpr std::uint32_t const tfVaultCreateMask = ~(tfUniversal | tfVaultPrivate | tfVaultShareNonTransferable);
+
+// LoanSet flags:
+// True, indicates the load supports overpayments
+constexpr std::uint32_t const tfLoanOverpayment = 0x00010000;
+constexpr std::uint32_t const tfLoanSetMask = ~(tfUniversal | tfLoanOverpayment);
 // clang-format on
 
 }  // namespace ripple

include/xrpl/protocol/detail/sfields.macro

@@ -126,6 +126,7 @@ TYPED_SFIELD(sfGracePeriod,              UINT32,    54)
 TYPED_SFIELD(sfPreviousPaymentDate,      UINT32,    55)
 TYPED_SFIELD(sfNextPaymentDueDate,       UINT32,    56)
 TYPED_SFIELD(sfPaymentRemaining,         UINT32,    57)
+TYPED_SFIELD(sfPaymentTotal,             UINT32,    58)
 
 // 64-bit integers (common)
 TYPED_SFIELD(sfIndexNext,                UINT64,     1)
@@ -226,6 +227,7 @@ TYPED_SFIELD(sfLatePaymentFee,           NUMBER,     11)
 TYPED_SFIELD(sfClosePaymentFee,          NUMBER,     12)
 TYPED_SFIELD(sfOverpaymentFee,           NUMBER,     13)
 TYPED_SFIELD(sfPrincipalOutstanding,     NUMBER,     14)
+TYPED_SFIELD(sfPrincipalRequested,       NUMBER,     15)
 
 // currency amount (common)
 TYPED_SFIELD(sfAmount,                   AMOUNT,     1)
@@ -321,6 +323,7 @@ TYPED_SFIELD(sfLockingChainDoor,         ACCOUNT,   22)
 TYPED_SFIELD(sfIssuingChainDoor,         ACCOUNT,   23)
 TYPED_SFIELD(sfSubject,                  ACCOUNT,   24)
 TYPED_SFIELD(sfBorrower,                 ACCOUNT,   25)
+TYPED_SFIELD(sfCounterparty,             ACCOUNT,   26)
 
 // vector of 256-bit
 TYPED_SFIELD(sfIndexes,                  VECTOR256,  1, SField::sMD_Never)
@@ -380,6 +383,7 @@ UNTYPED_SFIELD(sfXChainClaimAttestationCollectionElement, OBJECT, 30)
 UNTYPED_SFIELD(sfXChainCreateAccountAttestationCollectionElement, OBJECT, 31)
 UNTYPED_SFIELD(sfPriceData,              OBJECT,    32)
 UNTYPED_SFIELD(sfCredential,             OBJECT,    33)
+UNTYPED_SFIELD(sfCounterpartySignature,  OBJECT,    34)
 
 // array of objects (common)
 // ARRAY/1 is reserved for end of array

include/xrpl/protocol/detail/transactions.macro

@@ -508,6 +508,54 @@ TRANSACTION(ttVAULT_CLAWBACK, 69, VaultClawback, ({
     {sfAmount, soeOPTIONAL, soeMPTSupported},
 }))
 
+/** This transaction creates and updates a Loan Broker */
+TRANSACTION(ttLOAN_BROKER_SET, 70, LoanBrokerSet, ({
+    {sfVaultID, soeREQUIRED},
+    {sfLoanBrokerID, soeOPTIONAL},
+    {sfData, soeOPTIONAL},
+    {sfManagementFeeRate, soeDEFAULT},
+    {sfDebtMaximum, soeDEFAULT},
+    {sfCoverRateMinimum, soeDEFAULT},
+    {sfCoverRateLiquidation, soeDEFAULT},
+}))
+
+/** This transaction deletes a Loan Broker */
+TRANSACTION(ttLOAN_BROKER_DELETE, 71, LoanBrokerDelete, ({
+    {sfLoanBrokerID, soeREQUIRED},
+}))
+
+/** This transaction deposits First Loss Capital into a Loan Broker */
+TRANSACTION(ttLOAN_BROKER_COVER_DEPOSIT, 72, LoanBrokerCoverDeposit, ({
+    {sfLoanBrokerID, soeREQUIRED},
+    {sfNumber, soeREQUIRED},
+}))
+
+/** This transaction withdraws First Loss Capital from a Loan Broker */
+TRANSACTION(ttLOAN_BROKER_COVER_WITHDRAW, 73, LoanBrokerCoverWithdraw, ({
+    {sfLoanBrokerID, soeREQUIRED},
+    {sfNumber, soeREQUIRED},
+}))
+
+/** This transaction creates a Loan */
+TRANSACTION(ttLOAN_CREATE, 74, LoanCreate, ({
+    {sfLoanBrokerID, soeREQUIRED},
+    {sfData, soeOPTIONAL},
+    {sfCounterparty, soeOPTIONAL},
+    {sfCounterpartySignature, soeREQUIRED},
+    {sfLoanOriginationFee, soeDEFAULT},
+    {sfLoanServiceFee, soeDEFAULT},
+    {sfLatePaymentFee, soeDEFAULT},
+    {sfClosePaymentFee, soeDEFAULT},
+    {sfInterestRate, soeDEFAULT},
+    {sfLateInterestRate, soeDEFAULT},
+    {sfCloseInterestRate, soeDEFAULT},
+    {sfPrincipalRequested, soeREQUIRED},
+    {sfStartDate, soeREQUIRED},
+    {sfPaymentTotal, soeOPTIONAL},
+    {sfPaymentInterval, soeOPTIONAL},
+    {sfGracePeriod, soeOPTIONAL},
+}))
+
 /** This system-generated transaction type is used to update the status of the various amendments.
 
     For details, see: https://xrpl.org/amendments.html

src/libxrpl/protocol/InnerObjectFormats.cpp

@@ -28,6 +28,12 @@ InnerObjectFormats::InnerObjectFormats()
     // inner objects with the default fields have to be
     // constructed with STObject::makeInnerObject()
 
+    std::initializer_list<SOElement> const signingFields = {
+        {sfAccount, soeREQUIRED},
+        {sfSigningPubKey, soeREQUIRED},
+        {sfTxnSignature, soeREQUIRED},
+    };
+
     add(sfSignerEntry.jsonName,
         sfSignerEntry.getCode(),
         {
@@ -36,13 +42,7 @@ InnerObjectFormats::InnerObjectFormats()
             {sfWalletLocator, soeOPTIONAL},
         });
 
-    add(sfSigner.jsonName,
-        sfSigner.getCode(),
-        {
-            {sfAccount, soeREQUIRED},
-            {sfSigningPubKey, soeREQUIRED},
-            {sfTxnSignature, soeREQUIRED},
-        });
+    add(sfSigner.jsonName, sfSigner.getCode(), signingFields);
 
     add(sfMajority.jsonName,
         sfMajority.getCode(),
@@ -154,6 +154,10 @@ InnerObjectFormats::InnerObjectFormats()
             {sfIssuer, soeREQUIRED},
             {sfCredentialType, soeREQUIRED},
         });
+
+    add(sfCounterpartySignature.jsonName,
+        sfCounterpartySignature.getCode(),
+        signingFields);
 }
 
 InnerObjectFormats const&