diff --git a/src/main/java/com/r35157/libs/solana/valuetypes/WellKnownCurrencyTypes.java b/src/main/java/com/r35157/libs/solana/valuetypes/WellKnownCurrencyTypes.java
new file mode 100644
index 0000000..7c88278
--- /dev/null
+++ b/src/main/java/com/r35157/libs/solana/valuetypes/WellKnownCurrencyTypes.java
@@ -0,0 +1,52 @@
+package com.r35157.libs.solana.valuetypes;
+
+import com.r35157.libs.valuetypes.basic.CurrencyType;
+
+import java.util.UUID;
+
+/**
+ * Defines well-known currency types used by the Solana integration.
+ *
+ * <p>Each enum value wraps a {@link CurrencyType} with a stable identifier and a
+ * human-readable currency name. These predefined values are intended for common
+ * currencies that the Solana-related modules need to reference consistently.</p>
+ */
+public enum WellKnownCurrencyTypes {
+    /**
+     * Native Solana currency.
+     */
+    SOLANA(new CurrencyType(
+            UUID.fromString("019e0116-fce5-792f-a647-fa6da4dffec5"),
+            "Solana",
+            "SOL")
+    ),
+
+    /**
+     * Syrup USDC token currency.
+     */
+    SYRUPUSDC(new CurrencyType(
+            UUID.fromString("019e1d51-0600-7956-8231-f3b7058a91c2"),
+            "SyrupUSDC",
+            "SyrupUSDC")
+    );
+
+    /**
+     * Creates a well-known currency type entry.
+     *
+     * @param currencyType the currency type represented by this enum value
+     */
+    WellKnownCurrencyTypes(CurrencyType currencyType) {
+        this.currencyType = currencyType;
+    }
+
+    /**
+     * Returns the currency type represented by this enum value.
+     *
+     * @return the represented currency type
+     */
+    public CurrencyType getCurrencyType() {
+        return currencyType;
+    }
+
+    private final CurrencyType currencyType;
+}
\ No newline at end of file
diff --git a/src/main/tjava/com/r35157/libs/solana/SPLTokenHolding.tjava b/src/main/tjava/com/r35157/libs/solana/SPLTokenHolding.tjava
new file mode 100644
index 0000000..9a082ee
--- /dev/null
+++ b/src/main/tjava/com/r35157/libs/solana/SPLTokenHolding.tjava
@@ -0,0 +1,30 @@
+package com.r35157.libs.solana;
+
+import java.math.BigDecimal;
+
+/**
+ * Represents an SPL token holding owned by a Solana address.
+ *
+ * <p>The holding describes one SPL token account and the token mint it belongs to.
+ * The amount is represented both as a UI amount and as the raw on-chain amount,
+ * together with the number of decimals used by the token mint.</p>
+ *
+ * <p>The program id identifies which SPL token program owns the token account,
+ * for example the original SPL Token Program or the Token-2022 Program.</p>
+ *
+ * @param tokenAccount the SPL token account holding the token balance
+ * @param mintAddress the SPL mint address of the token
+ * @param uiAmount the human-readable token amount
+ * @param rawAmount the raw on-chain token amount before decimal conversion
+ * @param decimals the number of decimals used by the token mint
+ * @param programId the SPL token program id that owns the token account
+ */
+public record SPLTokenHolding(
+        ΩSPLTokenAccountΩ tokenAccount,
+        ΩSPLMintAddressΩ mintAddress,
+        ΩAmountΩ uiAmount,
+        ΩRawAmountΩ rawAmount,
+        ΩamountDecimalsΩ decimals,
+        ΩSPLProgramIdΩ programId
+) {
+}
\ No newline at end of file
diff --git a/src/main/tjava/com/r35157/libs/solana/SPLTokenSupply.tjava b/src/main/tjava/com/r35157/libs/solana/SPLTokenSupply.tjava
new file mode 100644
index 0000000..f858e7d
--- /dev/null
+++ b/src/main/tjava/com/r35157/libs/solana/SPLTokenSupply.tjava
@@ -0,0 +1,24 @@
+package com.r35157.libs.solana;
+
+import java.math.BigDecimal;
+
+/**
+ * Represents the total supply of an SPL token mint.
+ *
+ * <p>The supply is represented both as a UI amount and as the raw on-chain amount,
+ * together with the number of decimals used by the token mint.</p>
+ *
+ * @param mintAddress the SPL mint address whose supply was fetched
+ * @param uiAmount the human-readable token supply
+ * @param rawAmount the raw on-chain token supply before decimal conversion
+ * @param decimals the number of decimals used by the token mint
+ * @param programId the SPL token program id for the mint
+ */
+public record SPLTokenSupply(
+        ΩSPLMintAddressΩ mintAddress,
+        ΩAmountΩ uiAmount,
+        ΩRawAmountΩ rawAmount,
+        ΩamountDecimalsΩ decimals,
+        ΩSPLProgramIdΩ programId
+) {
+}
\ No newline at end of file
diff --git a/src/main/tjava/com/r35157/libs/solana/SolanaAccountInfo.tjava b/src/main/tjava/com/r35157/libs/solana/SolanaAccountInfo.tjava
new file mode 100644
index 0000000..ad51767
--- /dev/null
+++ b/src/main/tjava/com/r35157/libs/solana/SolanaAccountInfo.tjava
@@ -0,0 +1,24 @@
+package com.r35157.libs.solana;
+
+/**
+ * Represents basic information about a Solana account.
+ *
+ * <p>The address identifies the account that was queried. The owner identifies
+ * the Solana program that owns the account. The account data is represented as
+ * a Base64 encoded string, matching the encoding returned by the Solana RPC
+ * account-info response.</p>
+ *
+ * <p>For normal wallet/system accounts, the data may be empty. Program-owned
+ * accounts, token accounts, mint accounts and application-specific state
+ * accounts may contain encoded account data.</p>
+ *
+ * @param address the Solana account address
+ * @param owner the Solana program id that owns the account
+ * @param dataBase64 the account data encoded as Base64, or an empty string if the account has no data
+ */
+public record SolanaAccountInfo(
+        ΩSolanaAddressΩ address,
+        ΩSolanaProgramIdΩ owner,
+        String dataBase64
+) {
+}
\ No newline at end of file
diff --git a/src/main/tjava/com/r35157/libs/solana/SolanaBlockChain.tjava b/src/main/tjava/com/r35157/libs/solana/SolanaBlockChain.tjava
new file mode 100644
index 0000000..4e22891
--- /dev/null
+++ b/src/main/tjava/com/r35157/libs/solana/SolanaBlockChain.tjava
@@ -0,0 +1,146 @@
+package com.r35157.libs.solana;
+
+import com.r35157.libs.solana.valuetypes.SolanaProgramDerivedAddress;
+import com.r35157.libs.solana.valuetypes.economic.SolanaSPLTokenProgram;
+import com.r35157.libs.valuetypes.basic.MoneyAmount;
+
+import java.io.IOException;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+/**
+ * Provides read-oriented access to the Solana blockchain.
+ *
+ * <p>This interface exposes the Solana operations needed by higher-level
+ * integrations. It can fetch native SOL balances, SPL token holdings, NFT-like
+ * token holding candidates, account information and program derived addresses.</p>
+ *
+ * <p>The interface is intentionally generic and does not contain Raydium-specific
+ * logic. Higher-level integrations are expected to interpret Solana accounts,
+ * token holdings and derived addresses according to their own domain rules.</p>
+ */
+public interface SolanaBlockChain {
+    /**
+     * Fetches the native SOL balance for a Solana address.
+     *
+     * @param address the Solana address to inspect
+     * @return the native SOL balance for the address
+     * @throws IOException if the balance could not be fetched or parsed
+     * @throws InterruptedException if the calling thread is interrupted while fetching the balance
+     */
+    ΩSolanaAmountΩ getBalanceInSolana(ΩSolanaAddressΩ address) throws IOException, InterruptedException;
+
+    /**
+     * Fetches the native SOL balance for a Solana address in lamports.
+     *
+     * <p>Lamports are the smallest unit of native SOL.</p>
+     *
+     * @param address the Solana address to inspect
+     * @return the native SOL balance for the address in lamports
+     * @throws IOException if the balance could not be fetched or parsed
+     * @throws InterruptedException if the calling thread is interrupted while fetching the balance
+     */
+    ΩlamportsΩ getBalanceInLamport(ΩSolanaAddressΩ address) throws IOException, InterruptedException;
+
+    /**
+     * Fetches SPL token holdings owned by a Solana address for a specific token program.
+     *
+     * <p>The supplied token program decides which token accounts are inspected. For example,
+     * callers may query the original SPL Token Program or the Token-2022 Program depending
+     * on which token accounts they need to discover.</p>
+     *
+     * @param ownerAddress the Solana owner address whose token holdings should be inspected
+     * @param splProgramId the SPL token program to query
+     * @return a map of SPL mint addresses to token holding information
+     * @throws IOException if the token holdings could not be fetched or parsed
+     * @throws InterruptedException if the calling thread is interrupted while fetching token holdings
+     */
+    Map<ΩSPLMintAddressΩ, SPLTokenHolding> getSPLTokenHoldings(
+            ΩSolanaAddressΩ ownerAddress,
+            SolanaSPLTokenProgram splProgramId
+    ) throws IOException, InterruptedException;
+
+    /**
+     * Fetches NFT-like token mint address candidates owned by a Solana address for a specific token program.
+     *
+     * <p>This method identifies token holdings that look like NFTs within the supplied token
+     * program. A returned address is only a candidate. Higher-level integrations are responsible
+     * for deciding whether the returned address has domain-specific meaning.</p>
+     *
+     * // TODO This method currently identifies candidates from the owner's token holdings only.
+     * // A token with zero decimals and an owner balance of one is not guaranteed to be a real NFT,
+     * // because the mint's total supply may still be greater than one. A future implementation
+     * // should verify the mint supply, for example by using Solana getTokenSupply, before treating
+     * // the result as a confirmed NFT.
+     *
+     * @param ownerAddress the Solana owner address whose NFT-like holdings should be inspected
+     * @param splProgram the SPL token program to query
+     * @return the NFT-like Solana mint address candidates owned by the address
+     * @throws IOException if the NFT candidate addresses could not be fetched or parsed
+     * @throws InterruptedException if the calling thread is interrupted while fetching NFT candidate addresses
+     */
+    Set<ΩSolanaNFTAddressΩ> getSolanaNFTCandidateAddresses(
+            ΩSolanaAddressΩ ownerAddress,
+            SolanaSPLTokenProgram splProgram
+    ) throws IOException, InterruptedException;
+
+    /**
+     * Finds a Solana program derived address for a program id and a set of seeds.
+     *
+     * <p>The seeds describe the logical inputs used to derive the address. The implementation
+     * is responsible for converting each seed into the byte representation required by Solana.</p>
+     *
+     * @param programId the Solana program id used to derive the address
+     * @param seeds the seeds used when deriving the program address
+     * @return the derived Solana address together with its bump value
+     */
+    SolanaProgramDerivedAddress findProgramAddress(
+            ΩSolanaProgramIdΩ programId,
+            List<SolanaProgramAddressSeed> seeds
+    );
+
+    /**
+     * Fetches account information for a Solana account address.
+     *
+     * <p>If the account does not exist, this method returns {@code null}. If the account exists,
+     * the returned value contains the account address, the owning Solana program id and the
+     * account data encoded as Base64.</p>
+     *
+     * @param accountAddress the Solana account address to inspect
+     * @return account information, or {@code null} if the account does not exist
+     * @throws IOException if the account information could not be fetched or parsed
+     * @throws InterruptedException if the calling thread is interrupted while fetching account information
+     */
+    SolanaAccountInfo getAccountInfo(ΩSolanaAddressΩ accountAddress)
+            throws IOException, InterruptedException;
+
+    /**
+     * Encodes a raw 32-byte Solana address into its textual Solana address representation.
+     *
+     * <p>This method is intended for callers that have obtained raw Solana address bytes from
+     * account data and need the normal string representation used elsewhere in the API.</p>
+     *
+     * @param addressBytes the raw 32-byte Solana address
+     * @return the encoded Solana address
+     * @throws IllegalArgumentException if the supplied byte array is not a valid Solana address length
+     */
+    ΩSolanaAddressΩ encodeSolanaAddress(byte[] addressBytes);
+
+    /**
+     * Fetches the total supply of an SPL token mint for a specific token program.
+     *
+     * <p>The supplied token program identifies which SPL token program owns the mint,
+     * for example the original SPL Token Program or the Token-2022 Program.</p>
+     *
+     * @param mintAddress the SPL mint address whose supply should be fetched
+     * @param splProgram the SPL token program to query
+     * @return the SPL token supply for the mint
+     * @throws IOException if the token supply could not be fetched or parsed
+     * @throws InterruptedException if the calling thread is interrupted while fetching token supply
+     */
+    SPLTokenSupply getSPLTokenSupply(
+            ΩSPLMintAddressΩ mintAddress,
+            SolanaSPLTokenProgram splProgram
+    ) throws IOException, InterruptedException;
+}
\ No newline at end of file
diff --git a/src/main/tjava/com/r35157/libs/solana/SolanaConstants.tjava b/src/main/tjava/com/r35157/libs/solana/SolanaConstants.tjava
new file mode 100644
index 0000000..4bedf26
--- /dev/null
+++ b/src/main/tjava/com/r35157/libs/solana/SolanaConstants.tjava
@@ -0,0 +1,19 @@
+package com.r35157.libs.solana;
+
+/**
+ * Contains Solana-related constants used by the Solana integration.
+ *
+ * <p>This class is intended for shared constants that are part of the public
+ * Solana API surface or are useful across Solana-related modules.</p>
+ */
+public class SolanaConstants {
+    /**
+     * The default Solana JSON-RPC endpoint used by the integration.
+     */
+    public static final String RPC_URL = "https://api.mainnet.solana.com";
+
+    /**
+     * The SPL mint address for Syrup USDC on Solana.
+     */
+    public static final String SPL_TOKEN_SYRUPUSDC = "AvZZF1YaZDziPY2RCK4oJrRVrbN3mTD9NL24hPeaZeUj";
+}
\ No newline at end of file
diff --git a/src/main/tjava/com/r35157/libs/solana/SolanaProgramAddressSeed.tjava b/src/main/tjava/com/r35157/libs/solana/SolanaProgramAddressSeed.tjava
new file mode 100644
index 0000000..6f15eb1
--- /dev/null
+++ b/src/main/tjava/com/r35157/libs/solana/SolanaProgramAddressSeed.tjava
@@ -0,0 +1,51 @@
+package com.r35157.libs.solana;
+
+/**
+ * Represents a seed used when deriving a Solana program derived address.
+ *
+ * <p>A seed has a kind and a textual value. The kind tells the Solana
+ * implementation how the value should be converted to bytes before it is used
+ * in program address derivation.</p>
+ *
+ * <p>This keeps callers from having to perform encoding or decoding themselves.
+ * For example, a caller can provide a UTF-8 seed or a Solana address seed, and
+ * the implementation decides how each seed is converted to the byte format
+ * required by Solana.</p>
+ *
+ * @param kind the kind of seed
+ * @param value the textual seed value
+ */
+public record SolanaProgramAddressSeed(
+        SolanaProgramAddressSeedKind kind,
+        String value
+) {
+    /**
+     * Creates a UTF-8 seed.
+     *
+     * @param value the text value to encode as UTF-8
+     * @return a program address seed representing the supplied UTF-8 text
+     */
+    public static SolanaProgramAddressSeed utf8(String value) {
+        return new SolanaProgramAddressSeed(
+                SolanaProgramAddressSeedKind.UTF8,
+                value
+        );
+    }
+
+    /**
+     * Creates a Solana address seed.
+     *
+     * <p>The supplied address is represented textually here. The implementation
+     * deriving the program address is responsible for decoding the address into
+     * its raw Solana address bytes.</p>
+     *
+     * @param address the Solana address to use as a seed
+     * @return a program address seed representing the supplied Solana address
+     */
+    public static SolanaProgramAddressSeed solanaAddress(ΩSolanaAddressΩ address) {
+        return new SolanaProgramAddressSeed(
+                SolanaProgramAddressSeedKind.SOLANA_ADDRESS,
+                address
+        );
+    }
+}
\ No newline at end of file
diff --git a/src/main/tjava/com/r35157/libs/solana/SolanaProgramAddressSeedKind.tjava b/src/main/tjava/com/r35157/libs/solana/SolanaProgramAddressSeedKind.tjava
new file mode 100644
index 0000000..a544850
--- /dev/null
+++ b/src/main/tjava/com/r35157/libs/solana/SolanaProgramAddressSeedKind.tjava
@@ -0,0 +1,21 @@
+package com.r35157.libs.solana;
+
+/**
+ * Defines how a Solana program address seed should be converted to bytes.
+ *
+ * <p>Program derived addresses are calculated from byte seeds. This enum allows
+ * callers to describe the meaning of a seed without doing the byte conversion
+ * themselves.</p>
+ */
+public enum SolanaProgramAddressSeedKind {
+    /**
+     * A seed that should be encoded as UTF-8 text.
+     */
+    UTF8,
+
+    /**
+     * A seed that represents a Solana address and should be decoded from its
+     * textual Solana address representation to raw address bytes.
+     */
+    SOLANA_ADDRESS
+}
\ No newline at end of file
diff --git a/src/main/tjava/com/r35157/libs/solana/valuetypes/SolanaProgramDerivedAddress.tjava b/src/main/tjava/com/r35157/libs/solana/valuetypes/SolanaProgramDerivedAddress.tjava
new file mode 100644
index 0000000..f56ef8c
--- /dev/null
+++ b/src/main/tjava/com/r35157/libs/solana/valuetypes/SolanaProgramDerivedAddress.tjava
@@ -0,0 +1,17 @@
+package com.r35157.libs.solana.valuetypes;
+
+/**
+ * Represents a Solana program derived address and its bump value.
+ *
+ * <p>A program derived address is a Solana address generated deterministically
+ * from a program id and a set of seeds. The bump value is the extra seed value
+ * used to find a valid program derived address for those inputs.</p>
+ *
+ * @param address the derived Solana address
+ * @param bump the bump value used when deriving the address
+ */
+public record SolanaProgramDerivedAddress(
+        ΩSolanaAddressΩ address,
+        int bump
+) {
+}
\ No newline at end of file
diff --git a/src/main/tjava/com/r35157/libs/solana/valuetypes/economic/SolanaSPLToken.tjava b/src/main/tjava/com/r35157/libs/solana/valuetypes/economic/SolanaSPLToken.tjava
new file mode 100644
index 0000000..1461b30
--- /dev/null
+++ b/src/main/tjava/com/r35157/libs/solana/valuetypes/economic/SolanaSPLToken.tjava
@@ -0,0 +1,21 @@
+package com.r35157.libs.solana.valuetypes.economic;
+
+import com.r35157.libs.valuetypes.basic.CurrencyType;
+
+/**
+ * Represents an SPL token known to the Solana integration.
+ *
+ * <p>The currency type describes the economic identity of the token, while the
+ * mint address identifies the SPL token mint on Solana. The token address is the
+ * Solana address associated with the token in this model.</p>
+ *
+ * @param currencyType the currency type represented by this SPL token
+ * @param mintAddress the SPL mint address of the token
+ * @param tokenAddress the Solana address associated with the token
+ */
+public record SolanaSPLToken (
+        CurrencyType currencyType,
+        ΩSPLMintAddressΩ mintAddress,
+        ΩSolanaAddressΩ tokenAddress
+) {
+}
\ No newline at end of file
diff --git a/src/main/tjava/com/r35157/libs/solana/valuetypes/economic/SolanaSPLTokenProgram.tjava b/src/main/tjava/com/r35157/libs/solana/valuetypes/economic/SolanaSPLTokenProgram.tjava
new file mode 100644
index 0000000..9171c50
--- /dev/null
+++ b/src/main/tjava/com/r35157/libs/solana/valuetypes/economic/SolanaSPLTokenProgram.tjava
@@ -0,0 +1,44 @@
+package com.r35157.libs.solana.valuetypes.economic;
+
+/**
+ * Represents a Solana SPL token program supported by this integration.
+ *
+ * <p>Solana has more than one token program. The original SPL Token Program is
+ * used by many existing tokens, while the Token-2022 Program supports newer token
+ * functionality and extensions.</p>
+ *
+ * <p>The program address is used when querying token accounts owned by a wallet,
+ * for example when discovering SPL token holdings or NFT-like token holdings
+ * under a specific token program.</p>
+ */
+public enum SolanaSPLTokenProgram {
+    /**
+     * The original Solana SPL Token Program.
+     */
+    SPL_TOKEN_PROGRAM("TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA"),
+
+    /**
+     * The Solana Token-2022 Program.
+     */
+    TOKEN_2022_PROGRAM("TokenzQdBNbLqP5VEhdkAS6EPFLC1PHnBqCXEpPxuEb");
+
+    /**
+     * Creates a Solana SPL token program entry.
+     *
+     * @param address the Solana program address for the token program
+     */
+    SolanaSPLTokenProgram(ΩSPLProgramIdΩ address) {
+        this.address = address;
+    }
+
+    /**
+     * Returns the Solana program address for this token program.
+     *
+     * @return the SPL token program address
+     */
+    public ΩSPLProgramIdΩ getAddress() {
+        return address;
+    }
+
+    private final ΩSPLProgramIdΩ address;
+}
\ No newline at end of file