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updated beacon root and modulus to match DRAFT eip #5941

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Sep 26, 2023
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updated beacon root and modulus to match DRAFT eip #5941

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8 changes: 4 additions & 4 deletions ...core/src/main/java/org/hyperledger/besu/ethereum/mainnet/ParentBeaconBlockRootHelper.java
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Original file line number Diff line number Diff line change
Expand Up @@ -25,17 +25,17 @@
public interface ParentBeaconBlockRootHelper {

// Modulus to use for the timestamp to store the root
public static final long HISTORICAL_ROOTS_MODULUS = 98304;
public static final long HISTORY_BUFFER_LENGTH = 8191;
public static final Address BEACON_ROOTS_ADDRESS =
Address.fromHexString("0xbEAC020008aFF7331c0A389CB2AAb67597567d7a");
Address.fromHexString("0x000F3df6D732807Ef1319fB7B8bB8522d0Beac02");

static void storeParentBeaconBlockRoot(
final WorldUpdater worldUpdater, final long timestamp, final Bytes32 root) {
/*
see EIP-4788: https://github.com/ethereum/EIPs/blob/master/EIPS/eip-4788.md
*/
final long timestampReduced = timestamp % HISTORICAL_ROOTS_MODULUS;
final long timestampExtended = timestampReduced + HISTORICAL_ROOTS_MODULUS;
final long timestampReduced = timestamp % HISTORY_BUFFER_LENGTH;
final long timestampExtended = timestampReduced + HISTORY_BUFFER_LENGTH;

final UInt256 timestampIndex = UInt256.valueOf(timestampReduced);
final UInt256 rootIndex = UInt256.valueOf(timestampExtended);
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