Celestia Node DA API
JSON-RPC methods in the da module of celestia-node implementing the modular Data Availability interface used by Rollkit, Optimism Alt-DA, Arbitrum Nitro DAS, and other rollup frameworks. Exposes da.Submit, da.Get, da.GetIDs, da.GetProofs, da.Commit, da.Validate, and da.MaxBlobSize. DEPRECATED UPSTREAM: all eight da.* methods carry deprecated:true in the provider OpenRPC v0.31.4, and Celestia's own published Agent Skill directs new work to blob.Submit.