op-program: Build op-program client binary

Always builds a MIPs version of the client binary suitable for execution inside cannon.

op-node/eth/ssz.go

@@ -62,7 +62,9 @@ func unmarshalBytes32LE(in []byte, z *Uint256Quantity) {
 
 // MarshalSSZ encodes the ExecutionPayload as SSZ type
 func (payload *ExecutionPayload) MarshalSSZ(w io.Writer) (n int, err error) {
-	if len(payload.ExtraData) > math.MaxUint32-executionPayloadFixedPart {
+	// Cast to uint32 to enable 32-bit MIPS support where math.MaxUint32-executionPayloadFixedPart is too big for int
+	// In that case, len(payload.ExtraData) can't be longer than an int so this is always false anyway.
+	if uint32(len(payload.ExtraData)) > math.MaxUint32-uint32(executionPayloadFixedPart) {
 		return 0, ErrExtraDataTooLarge
 	}
 

op-program/Makefile

@@ -8,9 +8,22 @@ LDFLAGSSTRING +=-X github.com/ethereum-optimism/optimism/op-program/version.Vers
 LDFLAGSSTRING +=-X github.com/ethereum-optimism/optimism/op-program/version.Meta=$(VERSION_META)
 LDFLAGS := -ldflags "$(LDFLAGSSTRING)"
 
-op-program:
+op-program: \
+	op-program-host \
+	op-program-client \
+	op-program-client-mips
+
+op-program-host:
 	env GO111MODULE=on GOOS=$(TARGETOS) GOARCH=$(TARGETARCH) go build -v $(LDFLAGS) -o ./bin/op-program ./host/cmd/main.go
 
+op-program-client:
+	env GO111MODULE=on GOOS=$(TARGETOS) GOARCH=$(TARGETARCH) go build -v $(LDFLAGS) -o ./bin/op-program-client ./client/cmd/main.go
+
+op-program-client-mips:
+	env GO111MODULE=on GOOS=linux GOARCH=mips GOMIPS=softfloat go build -v $(LDFLAGS) -o ./bin/op-program-client.elf ./client/cmd/main.go
+	# verify output with: readelf -h bin/op-program-client.elf
+	# result is mips32, big endian, R3000
+
 clean:
 	rm -rf bin
 

op-program/client/cmd/main.go

+package main
+
+import (
+	"github.com/ethereum-optimism/optimism/op-program/client"
+	oplog "github.com/ethereum-optimism/optimism/op-service/log"
+)
+
+func main() {
+	// Default to a machine parsable but relatively human friendly log format.
+	// Don't do anything fancy to detect if color output is supported.
+	logger := oplog.NewLogger(oplog.CLIConfig{
+		Level:  "info",
+		Format: "logfmt",
+		Color:  false,
+	})
+	client.Main(logger)
+}