diff --git a/src/precompiles/ArbOwner.sol b/src/precompiles/ArbOwner.sol
index 63be3a560..42c7a9918 100644
--- a/src/precompiles/ArbOwner.sol
+++ b/src/precompiles/ArbOwner.sol
@@ -93,7 +93,19 @@ interface ArbOwner {
     function setWasmMaxDepth(uint32 depth) external;
 
     // @notice sets the cost of starting a stylus hostio call
-    function setWasmHostioInk(uint64 cost) external;
+    function setWasmHostioInk(uint64 ink) external;
+
+    // @notice sets the number of free wasm pages a tx gets
+    function setWasmFreePages(uint16 pages) external;
+
+    // @notice sets the base cost of each additional wasm page
+    function setWasmPageGas(uint32 gas) external;
+
+    // @notice sets the ramp that drives exponential wasm memory costs
+    function setWasmPageRamp(uint64 ramp) external;
+
+    // @notice sets the maximum number of pages a wasm may allocate
+    function setWasmPageLimit(uint16 limit) external view;
 
     /// @notice Sets serialized chain config in ArbOS state
     function setChainConfig(string calldata chainConfig) external;
diff --git a/src/precompiles/ArbWasm.sol b/src/precompiles/ArbWasm.sol
index acfd69e58..18dabead6 100644
--- a/src/precompiles/ArbWasm.sol
+++ b/src/precompiles/ArbWasm.sol
@@ -18,6 +18,10 @@ interface ArbWasm {
     // @return version the stylus version
     function stylusVersion() external view returns (uint32 version);
 
+    // @notice gets the stylus version the program was most recently compiled against.
+    // @return version the program version (0 for EVM contracts)
+    function programVersion(address program) external view returns (uint32 version);
+
     // @notice gets the conversion rate between gas and ink
     // @return price the price (in evm gas basis points) of ink
     function inkPrice() external view returns (uint64 price);
@@ -27,12 +31,24 @@ interface ArbWasm {
     function wasmMaxDepth() external view returns (uint32 depth);
 
     // @notice gets the fixed-cost overhead needed to initiate a hostio call
-    // @return cost the cost (in ink) of starting a stylus hostio call
-    function wasmHostioInk() external view returns (uint64 price);
+    // @return ink the cost of starting a stylus hostio call
+    function wasmHostioInk() external view returns (uint64 ink);
 
-    // @notice gets the stylus version the program was most recently compiled against.
-    // @return version the program version (0 for EVM contracts)
-    function programVersion(address program) external view returns (uint32 version);
+    // @notice gets the number of free wasm pages a program gets
+    // @return pages the number of wasm pages (2^16 bytes)
+    function freePages() external view returns (uint16 pages);
+
+    // @notice gets the base cost of each additional wasm page (2^16 bytes)
+    // @return gas base amount of gas needed to grow another wasm page
+    function pageGas() external view returns (uint32 gas);
+
+    // @notice gets the ramp that drives exponential memory costs
+    // @return ramp bits representing the floating point value
+    function pageRamp() external view returns (uint64 ramp);
+
+    // @notice gets the maximum number of pages a wasm may allocate
+    // @return limit the number of pages
+    function pageLimit() external view returns (uint16 limit);
 
     error ProgramNotCompiled();
     error ProgramOutOfDate(uint32 version);