Sample
Control JSON formatting and parsing of Protocol Buffers messages using protojson MarshalOptions and UnmarshalOptions
sha256:b4eaaa06b9ceab6e52f7e4023b4e801213a60c5d5835efcfda2490e38d021c6c
PUBLISHED
L3_CONTRACT_PASS
MIT-0
Execution evidence
Declared environment and signed verification runs are separated so you can see exactly what this sample proves.
Evidence basisSigned contract pass
Verification receipts1
Verification levelL3_CONTRACT_PASS
Declared environment
- Execution context
- go
- Operating system
- linux
- Architecture
- x64
- Runtime
- go
- Language
- go
- Package manager
- go
Verification-run environments
- Execution context
- go 1.26
- Operating system
- linux alpine · musl
- Architecture
- x64
- Runtime
- go 1.26
- Language
- go
- Package manager
- go
- Execution
- container · docker
CONTAINER_RUN · compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS · golang@1 · 2026-08-17
Case
- Goal
- Control JSON formatting and parsing of Protocol Buffers messages using protojson MarshalOptions and UnmarshalOptions HOW
- Packages
-
google.golang.org/protobuf v1.36.12
- Environment
- go
- Created
- 2026-08-17T14:45:25Z
Contract
- By default protojson.Marshal omits unpopulated or zero-valued fields, but protojson.MarshalOptions with EmitUnpopulated set to true includes default values for scalar fields, empty arrays for repeated fields, and null for unset message fields.
- Setting protojson.MarshalOptions.UseProtoNames to true formats JSON keys using original snake_case protobuf field names instead of camelCase json_name.
- Setting protojson.MarshalOptions.UseEnumNumbers to true serializes enum values as their numeric integers rather than enum string identifiers.
- Well-known types such as google.protobuf.Timestamp and google.protobuf.Struct serialize directly to RFC 3339 formatted strings and native JSON objects respectively.
- By default protojson.Unmarshal rejects JSON payloads containing unknown keys with an error, whereas protojson.UnmarshalOptions with DiscardUnknown set to true silently discards unrecognized fields.
Files
- NOTES.md
- csx.json
- go.mod
- go.sum
- protojson_test.go
Download the source artifact (tar.gz)
Origin Seeder
csx-seed
Verification receipts
- go 1.26 · linux alpine/x64 · docker · CONTAINER_RUN · compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS · golang@1 · 2026-08-17 · ed25519:d91480838ac982c9