what are the steps to fix the issue

[PazhaniMani]

pcodeindia@Pcodes-MacBook-Air GoBackend % go run .

github.com/oasisprotocol/nexus/api/v1/types

api/v1/types/util.go:16:9: undefined: ConsensusEventType
api/v1/types/util.go:18:7: undefined: ConsensusEventTypeStakingTransfer
api/v1/types/util.go:19:3: undefined: ConsensusEventTypeStakingBurn
api/v1/types/util.go:20:3: undefined: ConsensusEventTypeStakingEscrowAdd
api/v1/types/util.go:21:3: undefined: ConsensusEventTypeStakingEscrowTake
api/v1/types/util.go:22:3: undefined: ConsensusEventTypeStakingEscrowDebondingStart
api/v1/types/util.go:23:3: undefined: ConsensusEventTypeStakingEscrowReclaim
api/v1/types/util.go:42:9: undefined: Layer
api/v1/types/util.go:51:9: undefined: Runtime
api/v1/types/util.go:61:10: undefined: GetLayerStatsActiveAccountsParams
api/v1/types/util.go:23:3: too many errors
pcode@Pcodes-MacBook-Air GoBackend %

how to fix it

[mitjat]

You're missing the Go types that are autogenerated from the OpenAPI spec (v1.yaml).
See the Makefile. The best way to build locally is make nexus, as is also described in the top-level README.

[PazhaniMani]

I am a beginner for nexus and go lang, so please elaborate the step by step guide

[pro-wh]

run make nexus instead of go build .

[PazhaniMani]

pcode@Pcodes-MacBook-Air GoBackend % make nexus
fatal: No names found, cannot describe anything.
bash: oapi-codegen: command not found
ERROR: Installed oapi-codegen is not v1.12.x. See Makefile.
go: updates to go.mod needed; to update it:
go mod tidy
cannot locate oapi-codegen templates dir
make: *** [codegen-go] Error 1

[pro-wh]

oh shoot yeah, we don't have any docs about setting up the openapi tools