fix: rename difficulty to prevrandao

oguimbal · Jan 8, 2024 · 41249cd · 41249cd
1 parent b6b3ceb
commit 41249cd
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Showing 4 changed files with 21 additions and 3 deletions.
diff --git a/src/HyVM.huff b/src/HyVM.huff
@@ -304,8 +304,8 @@
         number
         CONTINUE()
 
-    op_difficulty:
-        difficulty
+    op_prevrandao:
+        prevrandao
         CONTINUE()
 
     op_gaslimit:

diff --git a/src/Jump-table.huff b/src/Jump-table.huff
@@ -19,7 +19,7 @@
     op_lt               op_gt           op_slt          op_sgt      op_eq           op_iszero       op_and          op_or               op_xor          op_not          op_byte         op_shl          op_shr          op_sar              unused              unused
     op_sha3             unused          unused          unused      unused          unused          unused          unused              unused          unused          unused          unused          unused          unused              unused              unused
     op_address          op_balance      op_origin       op_caller   op_callvalue    op_calldataload op_calldatasize op_calldatacopy     op_codesize     op_codecopy     op_gasprice     op_extcodesize  op_extcodecopy  op_returndatasize   op_returndatacopy   op_extcodehash
-    op_blockhash        op_coinbase     op_timestamp    op_number   op_difficulty   op_gaslimit     op_chainid      op_selfbalance      op_basefee      unused          unused          unused          unused          unused              unused              unused
+    op_blockhash        op_coinbase     op_timestamp    op_number   op_prevrandao   op_gaslimit     op_chainid      op_selfbalance      op_basefee      unused          unused          unused          unused          unused              unused              unused
     op_pop              op_mload        op_mstore       op_mstore8  op_sload        op_sstore       op_jump         op_jumpi            op_pc           op_msize        op_gas          op_jumpdest     unused          unused              unused              op_push0
     op_push1            op_push2        op_push3        op_push4    op_push5        op_push6        op_push7        op_push8            op_push9        op_push10       op_push11       op_push12       op_push13       op_push14           op_push15           op_push16
     op_push17           op_push18       op_push19       op_push20   op_push21       op_push22       op_push23       op_push24           op_push25       op_push26       op_push27       op_push28       op_push29       op_push30           op_push31           op_push32

diff --git a/test/HyVM/Opcodes.t.sol b/test/HyVM/Opcodes.t.sol
@@ -1147,4 +1147,14 @@ contract OpcodesTest is Test {
         );
         assertTrue(success, "expectRevert: call did not revert");
     }
+
+    function testPrevrandao(uint256 prevrandao) public {
+        // bytecode generated using: easm test/opcodes/prevrandao
+        // EVM-Assembler does not implement it, so it is added manually
+        vm.prevrandao(bytes32(prevrandao));
+        (bool success, bytes memory data) = hyvm.delegatecall(hex"4460005260206000f3");
+        assertEq(success, true);
+        (uint256 result) = abi.decode(data, (uint256));
+        assertEq(result, prevrandao);
+    }
 }
diff --git a/test/HyVM/opcodes/prevrandao b/test/HyVM/opcodes/prevrandao
@@ -0,0 +1,8 @@
+PREVRANDAO
+
+# return result
+PUSH1 0x0
+MSTORE
+PUSH1 0x20
+PUSH1 0x00
+RETURN