Engine APIs registration

	Source (upstream v1.17.3)	Current
File	eth/backend.go	backend.go
Symbol	Ethereum.APIs	Ethereum.APIs
Ref	v1.17.3	etc/v1.17.3-full-node

Registers ethash engine APIs (eth_getWork, eth_submitWork, eth_submitHashrate, ethash_getHashrate) via type assertion on consensus.Engine. Upstream removed APIs() from the Engine interface; we restore registration using a local interface assertion.

Diff — vs upstream v1.17.3 (modified in-place)

--- a/eth/backend.go
+++ b/eth/backend.go
@@ -3,9 +3,21 @@
 func (s *Ethereum) APIs() []rpc.API {
    apis := ethapi.GetAPIs(s.APIBackend)

+   // Register ethash engine APIs (eth_getWork, eth_submitWork, etc.) if available.
+   // Removed from consensus.Engine interface in upstream; restored for PoW chains.
+   type engineAPIs interface {
+       APIs(consensus.ChainHeaderReader) []rpc.API
+   }
+   if ea, ok := s.engine.(engineAPIs); ok {
+       apis = append(apis, ea.APIs(s.blockchain)...)
+   }
+
    // Append all the local APIs and return
    return append(apis, []rpc.API{
        {
+           Namespace: "eth",
+           Service:   NewEthereumAPI(s),
+       }, {
            Namespace: "miner",
            Service:   NewMinerAPI(s),
        }, {

← Eth Service