Apollo

In progress

Blocked by

• upstream fixkupoblock-encodingera-identitytransaction-encoding
• upstream fixogmiostransaction-encodingera-identityplutus-languageprotocol-parameters
• upstream fixblockfrostprotocol-parameters
• upstream fixkoiosprotocol-parameters

Waiting on

• blockfrostno-evidence, no verdicttransaction-encoding
• koiosno-evidence, no verdicttransaction-encoding
• utxorpcin-progress, no verdictblock-encodingtransaction-encoding

Lead decisions

• confirmed· blockfrostprotocol-parameters

  The Blockfrost backend builds transactions from /epochs/latest/parameters, which serves no Dijkstra parameters.

  • backend/blockfrost/blockfrost.go:136data, err := b.requestContext(ctx, "GET", "/epochs/latest/parameters", nil, "")

• confirmed· koiosprotocol-parameters

  The new Koios backend builds from /epoch_params, reaching the provider's unresolved Dijkstra parameter handling.

  • backend/koios/koios.go:172path := "/epoch_params?_epoch_no="

• confirmed· kupoblock-encodingera-identitytransaction-encoding

  The Ogmios chain context looks UTxOs up through Kupo matches. Kupo cannot index Dijkstra blocks (R2 gap), so its matches stop at the fork.

  • backend/ogmios/client.go:339matches, err := c.client.Matches(

• confirmed· ogmiostransaction-encodingera-identity

  Submits transactions through Ogmios, whose v7 release encodes an earlier Dijkstra transaction format.

  • backend/ogmios/ogmios.go:354func (o *OgmiosChainContext) SubmitTxContext(ctx context.Context, txCbor []byte) (common.Blake2b256, error) {

• confirmed· ogmiosplutus-language

  Evaluates script execution units through Ogmios.

  • backend/ogmios/ogmios.go:373func (o *OgmiosChainContext) EvaluateTxContext(

• confirmed· ogmiosprotocol-parameters

  Reads protocol parameters from Ogmios for transaction building.

  • backend/ogmios/ogmios.go:220func (o *OgmiosChainContext) ProtocolParamsContext(ctx context.Context) (backend.ProtocolParameters, error) {

• not-reached· blockfrostera-identity

  The Blockfrost backend does not call /network/eras.

  • backend/blockfrost/blockfrost.go:300func (b *BlockFrostChainContext) SubmitTx(txCbor []byte) (common.Blake2b256, error) {

• not-reached· cardano-db-syncblock-encodingera-identityprotocol-parametersstake-pool-registrationtransaction-encoding

  The db-sync hit is a comment explaining Koios script bytes, not a direct db-sync client; Koios use is assessed separately.

  • backend/koios/koios.go:1052// from db-sync, so they are tried both as given and with one CBOR byte-string

• not-reached· gouroborosblock-encodingera-identity

  Builds and serializes its own Conway transactions with gouroboros ledger types; chain data comes through its Ogmios and Blockfrost backends, and it neither decodes blocks nor detects transaction eras with gouroboros.

  • apollo.go:2329a.tx = &conway.ConwayTransaction{

• not-reached· koiosera-identity

  The Koios tip model consumes epoch and absolute slot only, not an era name or era history.

  • backend/koios/koios.go:241AbsSlot uint64 `json:"abs_slot"`

• not-reached· ogmiosblock-encoding

  Apollo follows no chain through Ogmios; it only queries, submits and evaluates.

  • backend/ogmios/ogmios.go:350func (o *OgmiosChainContext) SubmitTx(txCbor []byte) (common.Blake2b256, error) {