build, cmd/keeper: add "womir" target

Co-authored-by: Leo <leo@powdrlabs.com>

build/ci.go

@@ -107,6 +107,12 @@ var (
 			Tags: "ziren",
 			Env:  map[string]string{"GOMIPS": "softfloat", "CGO_ENABLED": "0"},
 		},
+		{
+			Name:   "womir",
+			GOOS:   "js",
+			GOARCH: "wasm",
+			Tags:   "womir",
+		},
 		{
 			Name:   "wasm-js",
 			GOOS:   "js",
@@ -163,11 +169,11 @@ var (
 
 	// Distros for which packages are created
 	debDistros = []string{
-		"xenial",   // 16.04, EOL: 04/2026
-		"bionic",   // 18.04, EOL: 04/2028
-		"focal",    // 20.04, EOL: 04/2030
-		"jammy",    // 22.04, EOL: 04/2032
-		"noble",    // 24.04, EOL: 04/2034
+		"xenial", // 16.04, EOL: 04/2026
+		"bionic", // 18.04, EOL: 04/2028
+		"focal",  // 20.04, EOL: 04/2030
+		"jammy",  // 22.04, EOL: 04/2032
+		"noble",  // 24.04, EOL: 04/2034
 	}
 
 	// This is where the tests should be unpacked.

cmd/keeper/getpayload_wasm.go

@@ -14,8 +14,8 @@
 // You should have received a copy of the GNU Lesser General Public License
 // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
 
-//go:build wasm
-// +build wasm
+//go:build wasm && !womir
+// +build wasm,!womir
 
 package main
 

cmd/keeper/getpayload_womir.go

@@ -0,0 +1,49 @@
+// Copyright 2026 The go-ethereum Authors
+// This file is part of the go-ethereum library.
+//
+// The go-ethereum library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The go-ethereum library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
+
+//go:build womir
+
+package main
+
+import "unsafe"
+
+// These match the WOMIR guest-io imports (env module).
+// Protocol: __hint_input prepares next item, __hint_buffer reads words.
+// Each item has format: [byte_len_u32_le, ...data_words_padded_to_4bytes]
+//
+//go:wasmimport env __hint_input
+func hintInput()
+
+//go:wasmimport env __hint_buffer
+func hintBuffer(ptr unsafe.Pointer, numWords uint32)
+func readWord() uint32 {
+	var buf [4]byte
+	hintBuffer(unsafe.Pointer(&buf[0]), 1)
+	return uint32(buf[0]) | uint32(buf[1])<<8 | uint32(buf[2])<<16 | uint32(buf[3])<<24
+}
+func readBytes() []byte {
+	hintInput()
+	byteLen := readWord()
+	numWords := (byteLen + 3) / 4
+	data := make([]byte, numWords*4)
+	hintBuffer(unsafe.Pointer(&data[0]), numWords)
+	return data[:byteLen]
+}
+
+// getInput reads the RLP-encoded Payload from the WOMIR hint stream.
+func getInput() []byte {
+	return readBytes()
+}

cmd/keeper/stubs.go

@@ -14,8 +14,8 @@
 // You should have received a copy of the GNU Lesser General Public License
 // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
 
-//go:build !example && !ziren && !wasm
-// +build !example,!ziren,!wasm
+//go:build !example && !ziren && !wasm && !womir
+// +build !example,!ziren,!wasm,!womir
 
 package main