Inomurko/fix openapi spec for dtl

[InoMurko]

Description
Generating client code from the OpenAPI spec in the repo produced a number of errors.
Same for using the online editor: https://editor.swagger.io/

docker run --rm -v "${PWD}:/local" openapitools/openapi-generator-cli generate \
    -i https://raw.githubusercontent.com/ethereum-optimism/optimism/develop/packages/data-transport-layer/openapi.yml \
    -g java \
    -o /local/out/java

[changeset-bot]

⚠️ No Changeset found

Latest commit: 4fd211c

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

This PR includes no changesets

When changesets are added to this PR, you'll see the packages that this PR includes changesets for and the associated semver types

Click here to learn what changesets are, and how to add one.

Click here if you're a maintainer who wants to add a changeset to this PR

[InoMurko]

Now it should be fixed:

docker run --rm -v "${PWD}:/local" openapitools/openapi-generator-cli generate \
    -i https://raw.githubusercontent.com/ethereum-optimism/optimism/7d7b96fb636414679fd38a7f36e8e26cb95fe451/packages/data-transport-layer/openapi.yml \
    -g java \
    -o /local/out/java

by using format: "uint64", java client produces correct types (for example ethereum context):

public static final String SERIALIZED_NAME_BLOCK_NUMBER = "blockNumber";
  @SerializedName(SERIALIZED_NAME_BLOCK_NUMBER)
  private Long blockNumber;

same goes for go:

// EthereumContext struct for EthereumContext
type EthereumContext struct {
	BlockNumber *int64 `json:"blockNumber,omitempty"`
	Timestamp *int64 `json:"timestamp,omitempty"`
	BlockHash *string `json:"blockHash,omitempty"`
}

[mergify]

This PR has been added to the merge queue, and will be merged soon.

[mergify]

This PR is next in line to be merged, and will be merged as soon as checks pass.