implement the proposed gas changes for bls / eip-2537 (#8008)

* implement the proposed gas changes for bls / eip-2537 for pectra-devnet-5
* disable eip-2537 testing until we have new artifacts that reflect pectra gas costs

Signed-off-by: garyschulte <[email protected]>

config/src/test/java/org/hyperledger/besu/config/GenesisReaderTest.java

@@ -41,7 +41,7 @@ public void readGenesisFromObjectNode() {
     final var configNode = mapper.createObjectNode();
     configNode.put("londonBlock", 1);
     final var allocNode = mapper.createObjectNode();
-    allocNode.put(Address.BLS12_G2MUL.toUnprefixedHexString(), generateAllocation(Wei.ONE));
+    allocNode.put(Address.BLS12_G2MULTIEXP.toUnprefixedHexString(), generateAllocation(Wei.ONE));
     final var rootNode = mapper.createObjectNode();
     rootNode.put("chainId", 12);
     rootNode.put(CONFIG_FIELD, configNode);
@@ -52,15 +52,16 @@ public void readGenesisFromObjectNode() {
     assertThat(genesisReader.getRoot().has(ALLOCATION_FIELD)).isFalse();
     assertThat(genesisReader.getConfig().get("londonblock").asInt()).isEqualTo(1);
     assertThat(genesisReader.streamAllocations())
-        .containsExactly(new GenesisAccount(Address.BLS12_G2MUL, 0, Wei.ONE, null, Map.of(), null));
+        .containsExactly(
+            new GenesisAccount(Address.BLS12_G2MULTIEXP, 0, Wei.ONE, null, Map.of(), null));
   }
 
   @Test
   public void readGenesisFromObjectDoesNotModifyObjectNodeArg() {
     final var configNode = mapper.createObjectNode();
     configNode.put("londonBlock", 1);
     final var allocNode = mapper.createObjectNode();
-    allocNode.put(Address.BLS12_G2MUL.toUnprefixedHexString(), generateAllocation(Wei.ONE));
+    allocNode.put(Address.BLS12_G2MULTIEXP.toUnprefixedHexString(), generateAllocation(Wei.ONE));
     final var rootNode = mapper.createObjectNode();
     rootNode.put("chainId", 12);
     rootNode.put(CONFIG_FIELD, configNode);

datatypes/src/main/java/org/hyperledger/besu/datatypes/Address.java

@@ -72,29 +72,23 @@ public class Address extends DelegatingBytes {
   /** The constant BLS12_G1ADD. */
   public static final Address BLS12_G1ADD = Address.precompiled(0xB);
 
-  /** The constant BLS12_G1MUL. */
-  public static final Address BLS12_G1MUL = Address.precompiled(0xC);
-
   /** The constant BLS12_G1MULTIEXP. */
-  public static final Address BLS12_G1MULTIEXP = Address.precompiled(0xD);
+  public static final Address BLS12_G1MULTIEXP = Address.precompiled(0xC);
 
   /** The constant BLS12_G2ADD. */
-  public static final Address BLS12_G2ADD = Address.precompiled(0xE);
-
-  /** The constant BLS12_G2MUL. */
-  public static final Address BLS12_G2MUL = Address.precompiled(0xF);
+  public static final Address BLS12_G2ADD = Address.precompiled(0xD);
 
   /** The constant BLS12_G2MULTIEXP. */
-  public static final Address BLS12_G2MULTIEXP = Address.precompiled(0x10);
+  public static final Address BLS12_G2MULTIEXP = Address.precompiled(0xE);
 
   /** The constant BLS12_PAIRING. */
-  public static final Address BLS12_PAIRING = Address.precompiled(0x11);
+  public static final Address BLS12_PAIRING = Address.precompiled(0xF);
 
   /** The constant BLS12_MAP_FP_TO_G1. */
-  public static final Address BLS12_MAP_FP_TO_G1 = Address.precompiled(0x12);
+  public static final Address BLS12_MAP_FP_TO_G1 = Address.precompiled(0x10);
 
   /** The constant BLS12_MAP_FP2_TO_G2. */
-  public static final Address BLS12_MAP_FP2_TO_G2 = Address.precompiled(0x13);
+  public static final Address BLS12_MAP_FP2_TO_G2 = Address.precompiled(0x11);
 
   /** The constant ZERO. */
   public static final Address ZERO = Address.fromHexString("0x0");

ethereum/evmtool/src/main/java/org/hyperledger/besu/evmtool/benchmarks/BLS12Benchmark.java

@@ -17,10 +17,8 @@
 import org.hyperledger.besu.evm.EvmSpecVersion;
 import org.hyperledger.besu.evm.precompile.AbstractBLS12PrecompiledContract;
 import org.hyperledger.besu.evm.precompile.BLS12G1AddPrecompiledContract;
-import org.hyperledger.besu.evm.precompile.BLS12G1MulPrecompiledContract;
 import org.hyperledger.besu.evm.precompile.BLS12G1MultiExpPrecompiledContract;
 import org.hyperledger.besu.evm.precompile.BLS12G2AddPrecompiledContract;
-import org.hyperledger.besu.evm.precompile.BLS12G2MulPrecompiledContract;
 import org.hyperledger.besu.evm.precompile.BLS12G2MultiExpPrecompiledContract;
 import org.hyperledger.besu.evm.precompile.BLS12MapFp2ToG2PrecompiledContract;
 import org.hyperledger.besu.evm.precompile.BLS12MapFpToG1PrecompiledContract;
@@ -166,11 +164,9 @@ public void runBenchmark(
     }
 
     benchmarkG1Add(output);
-    benchmarkG1Mul(output);
     benchmarkG1MultiExp32Pairs(output);
     benchmarkMapFpToG1(output);
     benchmarkG2Add(output);
-    benchmarkG2Mul(output);
     benchmarkG2MultiExp32Pairs(output);
     benchmarkMapFp2ToG2(output);
     benchmarkBlsPairing(output);
@@ -198,28 +194,6 @@ private void benchmarkG1Add(final PrintStream output) {
         gasCost, execTime * 1_000_000, gasCost / execTime / 1_000_000);
   }
 
-  private void benchmarkG1Mul(final PrintStream output) {
-    final Map<String, Bytes> testCases = new LinkedHashMap<>();
-    for (int i = 0; i < g1PointPairs.length; i++) {
-      testCases.put("G1 Mul " + i, Bytes.fromHexString(g1PointPairs[i] + scalars[i]));
-    }
-
-    BLS12G1MulPrecompiledContract g1addContract = new BLS12G1MulPrecompiledContract();
-    warmup = MATH_WARMUP / testCases.size();
-    iterations = MATH_ITERATIONS / testCases.size();
-    double execTime = Double.MIN_VALUE; // a way to dodge divide by zero
-    long gasCost = 0;
-    for (final Map.Entry<String, Bytes> testCase : testCases.entrySet()) {
-      execTime += runPrecompileBenchmark(testCase.getValue(), g1addContract);
-      gasCost += g1addContract.gasRequirement(testCase.getValue());
-    }
-    execTime /= testCases.size();
-    gasCost /= testCases.size();
-    output.printf(
-        "Bls12 G1 Mul %,6d avg gas @%,7.1f µs /%,8.1f MGps%n",
-        gasCost, execTime * 1_000_000, gasCost / execTime / 1_000_000);
-  }
-
   private void benchmarkG1MultiExp32Pairs(final PrintStream output) {
     final Map<String, Bytes> testCases = new LinkedHashMap<>();
 
@@ -290,28 +264,6 @@ private void benchmarkG2Add(final PrintStream output) {
         gasCost, execTime * 1_000_000, gasCost / execTime / 1_000_000);
   }
 
-  private void benchmarkG2Mul(final PrintStream output) {
-    final Map<String, Bytes> testCases = new LinkedHashMap<>();
-    for (int i = 0; i < g2PointPairs.length; i++) {
-      testCases.put("G2 Mul " + i, Bytes.fromHexString(g2PointPairs[i] + scalars[i]));
-    }
-
-    BLS12G2MulPrecompiledContract g1addContract = new BLS12G2MulPrecompiledContract();
-    warmup = MATH_WARMUP / testCases.size();
-    iterations = MATH_ITERATIONS / testCases.size();
-    double execTime = Double.MIN_VALUE; // a way to dodge divide by zero
-    long gasCost = 0;
-    for (final Map.Entry<String, Bytes> testCase : testCases.entrySet()) {
-      execTime += runPrecompileBenchmark(testCase.getValue(), g1addContract);
-      gasCost += g1addContract.gasRequirement(testCase.getValue());
-    }
-    execTime /= testCases.size();
-    gasCost /= testCases.size();
-    output.printf(
-        "Bls12 G2 Mul %,6d avg gas @%,7.1f µs /%,8.1f MGps%n",
-        gasCost, execTime * 1_000_000, gasCost / execTime / 1_000_000);
-  }
-
   private void benchmarkG2MultiExp32Pairs(final PrintStream output) {
     final Map<String, Bytes> testCases = new LinkedHashMap<>();
 

ethereum/referencetests/src/reference-test/java/org/hyperledger/besu/ethereum/vm/BlockchainReferenceTestTools.java

@@ -93,6 +93,10 @@ public class BlockchainReferenceTestTools {
 
     // None of the Prague tests have withdrawals and deposits handling
     params.ignore("\\[Prague\\]");
+
+    // TODO: remove once updated EIP-2537 gas cost artifacts exist
+    params.ignore("/eip2537_bls_12_381_precompiles/");
+    params.ignore("/stEIP2537/");
   }
 
   private BlockchainReferenceTestTools() {

ethereum/referencetests/src/reference-test/java/org/hyperledger/besu/ethereum/vm/GeneralStateReferenceTestTools.java

@@ -104,6 +104,11 @@ private static ProtocolSpec protocolSpec(final String name) {
 
     // EOF tests are written against an older version of the spec
     params.ignore("/stEOF/");
+
+    // TODO: remove once updated EIP-2537 gas cost artifacts exist
+    params.ignore("/eip2537_bls_12_381_precompiles/");
+    params.ignore("/stEIP2537/");
+
   }
 
   private GeneralStateReferenceTestTools() {

evm/src/main/java/org/hyperledger/besu/evm/precompile/AbstractBLS12PrecompiledContract.java

@@ -33,22 +33,40 @@ public abstract class AbstractBLS12PrecompiledContract implements PrecompiledCon
 
   private static final Logger LOG = LoggerFactory.getLogger(AbstractBLS12PrecompiledContract.class);
 
+  static {
+    // set parallel 1 for testing.  Remove this for prod code (or set a rational limit)
+    // LibGnarkEIP2537.setDegreeOfMSMParallelism(1);
+  }
+
   /** The Discount table. */
-  static final int[] DISCOUNT_TABLE =
+  static final int[] G1_DISCOUNT_TABLE =
+      new int[] {
+        -1, 1000, 949, 848, 797, 764, 750, 738, 728, 719, 712, 705, 698, 692, 687, 682, 677, 673,
+        669, 665, 661, 658, 654, 651, 648, 645, 642, 640, 637, 635, 632, 630, 627, 625, 623, 621,
+        619, 617, 615, 613, 611, 609, 608, 606, 604, 603, 601, 599, 598, 596, 595, 593, 592, 591,
+        589, 588, 586, 585, 584, 582, 581, 580, 579, 577, 576, 575, 574, 573, 572, 570, 569, 568,
+        567, 566, 565, 564, 563, 562, 561, 560, 559, 558, 557, 556, 555, 554, 553, 552, 551, 550,
+        549, 548, 547, 547, 546, 545, 544, 543, 542, 541, 540, 540, 539, 538, 537, 536, 536, 535,
+        534, 533, 532, 532, 531, 530, 529, 528, 528, 527, 526, 525, 525, 524, 523, 522, 522, 521,
+        520, 520, 519
+      };
+
+  static final int[] G2_DISCOUNT_TABLE =
       new int[] {
-        -1, 1_200, 888, 764, 641, 594, 547, 500, 453, 438, 423, 408, 394, 379, 364, 349,
-        334, 330, 326, 322, 318, 314, 310, 306, 302, 298, 294, 289, 285, 281, 277, 273,
-        269, 268, 266, 265, 263, 262, 260, 259, 257, 256, 254, 253, 251, 250, 248, 247,
-        245, 244, 242, 241, 239, 238, 236, 235, 233, 232, 231, 229, 228, 226, 225, 223,
-        222, 221, 220, 219, 219, 218, 217, 216, 216, 215, 214, 213, 213, 212, 211, 211,
-        210, 209, 208, 208, 207, 206, 205, 205, 204, 203, 202, 202, 201, 200, 199, 199,
-        198, 197, 196, 196, 195, 194, 193, 193, 192, 191, 191, 190, 189, 188, 188, 187,
-        186, 185, 185, 184, 183, 182, 182, 181, 180, 179, 179, 178, 177, 176, 176, 175,
-        174
+        -1, 1000, 1000, 923, 884, 855, 832, 812, 796, 782, 770, 759, 749, 740, 732, 724, 717, 711,
+        704, 699, 693, 688, 683, 679, 674, 670, 666, 663, 659, 655, 652, 649, 646, 643, 640, 637,
+        634, 632, 629, 627, 624, 622, 620, 618, 615, 613, 611, 609, 607, 606, 604, 602, 600, 598,
+        597, 595, 593, 592, 590, 589, 587, 586, 584, 583, 582, 580, 579, 578, 576, 575, 574, 573,
+        571, 570, 569, 568, 567, 566, 565, 563, 562, 561, 560, 559, 558, 557, 556, 555, 554, 553,
+        552, 552, 551, 550, 549, 548, 547, 546, 545, 545, 544, 543, 542, 541, 541, 540, 539, 538,
+        537, 537, 536, 535, 535, 534, 533, 532, 532, 531, 530, 530, 529, 528, 528, 527, 526, 526,
+        525, 524, 524
       };
 
   /** The Max discount. */
-  static final int MAX_DISCOUNT = 174;
+  static final int G1_MAX_DISCOUNT = 519;
+
+  static final int G2_MAX_DISCOUNT = 524;
 
   private final String name;
   private final byte operationId;
@@ -121,21 +139,40 @@ public PrecompileContractResult computePrecompile(
   }
 
   /**
-   * Gets discount.
+   * Gets G1 MSM discount.
+   *
+   * @param k the k
+   * @return the discount
+   */
+  protected int getG1Discount(final int k) {
+    // `k * multiplication_cost * discount / multiplier` where `multiplier = 1000`
+    // multiplication_cost and multiplier are folded into one constant as a long and placed first to
+    // prevent int32 overflow
+    // there was a table prepared for discount in case of k <= 128 points in the multiexponentiation
+    // with a discount cup max_discount for k > 128.
+
+    if (k >= G1_DISCOUNT_TABLE.length) {
+      return G1_MAX_DISCOUNT;
+    }
+    return G1_DISCOUNT_TABLE[k];
+  }
+
+  /**
+   * Gets G2 MSM discount.
    *
    * @param k the k
    * @return the discount
    */
-  protected int getDiscount(final int k) {
+  protected int getG2Discount(final int k) {
     // `k * multiplication_cost * discount / multiplier` where `multiplier = 1000`
     // multiplication_cost and multiplier are folded into one constant as a long and placed first to
     // prevent int32 overflow
     // there was a table prepared for discount in case of k <= 128 points in the multiexponentiation
     // with a discount cup max_discount for k > 128.
 
-    if (k >= DISCOUNT_TABLE.length) {
-      return MAX_DISCOUNT;
+    if (k >= G2_DISCOUNT_TABLE.length) {
+      return G2_MAX_DISCOUNT;
     }
-    return DISCOUNT_TABLE[k];
+    return G2_DISCOUNT_TABLE[k];
   }
 }

evm/src/main/java/org/hyperledger/besu/evm/precompile/BLS12G1AddPrecompiledContract.java

@@ -30,6 +30,6 @@ public BLS12G1AddPrecompiledContract() {
 
   @Override
   public long gasRequirement(final Bytes input) {
-    return 500L;
+    return 375L;
   }
 }

evm/src/main/java/org/hyperledger/besu/evm/precompile/BLS12G1MultiExpPrecompiledContract.java

@@ -34,6 +34,6 @@ public BLS12G1MultiExpPrecompiledContract() {
   @Override
   public long gasRequirement(final Bytes input) {
     final int k = input.size() / PARAMETER_LENGTH;
-    return 12L * k * getDiscount(k);
+    return 12L * k * getG1Discount(k);
   }
 }

evm/src/main/java/org/hyperledger/besu/evm/precompile/BLS12G2AddPrecompiledContract.java

@@ -30,6 +30,6 @@ public BLS12G2AddPrecompiledContract() {
 
   @Override
   public long gasRequirement(final Bytes input) {
-    return 800L;
+    return 600L;
   }
 }

evm/src/main/java/org/hyperledger/besu/evm/precompile/BLS12G2MultiExpPrecompiledContract.java

@@ -34,6 +34,6 @@ public BLS12G2MultiExpPrecompiledContract() {
   @Override
   public long gasRequirement(final Bytes input) {
     final int k = input.size() / PARAMETER_LENGTH;
-    return 45L * k * getDiscount(k);
+    return 22_500L * k * getG2Discount(k) / 1000L;
   }
 }

evm/src/main/java/org/hyperledger/besu/evm/precompile/BLS12MapFp2ToG2PrecompiledContract.java

@@ -33,6 +33,6 @@ public BLS12MapFp2ToG2PrecompiledContract() {
 
   @Override
   public long gasRequirement(final Bytes input) {
-    return 75_000L;
+    return 23_800L;
   }
 }

evm/src/main/java/org/hyperledger/besu/evm/precompile/BLS12MapFpToG1PrecompiledContract.java

@@ -33,6 +33,6 @@ public BLS12MapFpToG1PrecompiledContract() {
 
   @Override
   public long gasRequirement(final Bytes input) {
-    return 5_500L;
+    return 5_500;
   }
 }

evm/src/main/java/org/hyperledger/besu/evm/precompile/BLS12PairingPrecompiledContract.java

@@ -34,6 +34,6 @@ public BLS12PairingPrecompiledContract() {
   @Override
   public long gasRequirement(final Bytes input) {
     final int k = input.size() / PARAMETER_LENGTH;
-    return 43_000L * k + 65_000L;
+    return 32_600L * k + 37_700L;
   }
 }