42: Fail on multiple SPL token accounts for the same mint

2026-08-05 10:12:39 +02:00
parent bbba18dcae
commit d4e6d3438b
2 changed files with 14 additions and 2 deletions
@@ -55,6 +55,7 @@ public interface SolanaBlockChain {
     * @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
+     * @throws IllegalStateException if multiple token accounts for the same mint is detected, as this is not supported yet.
     */
    Map<ΩSPLMintAddressΩ, SPLTokenHolding> getSPLTokenHoldings(
            ΩSolanaAddressΩ ownerAddress,
@@ -149,14 +149,25 @@ public class SolanaBlockChainImpl implements SolanaBlockChain {
            String uiAmountString = tokenAmount.path("uiAmountString").asText();
            BigDecimal uiAmount = new BigDecimal(uiAmountString);

-            result.put(mint, new SPLTokenHolding(
+            SPLTokenHolding holding = new SPLTokenHolding(
                    tokenAccount,
                    mint,
                    uiAmount,
                    rawAmount,
                    decimals,
                    splProgram.getAddress()
-            ));
+            );
+
+            SPLTokenHolding previous = result.putIfAbsent(mint, holding);
+
+            if (previous != null) {
+                throw new IllegalStateException(
+                        "Multiple SPL token accounts found for mint "
+                                + mint
+                                + " and owner "
+                                + ownerAddress
+                );
+            }
        }

        return result;