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node: refactor package node (#21105)

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This PR significantly changes the APIs for instantiating Ethereum nodes in
a Go program. The new APIs are not backwards-compatible, but we feel that
this is made up for by the much simpler way of registering services on
node.Node. You can find more information and rationale in the design
document: https://gist.github.com/renaynay/5bec2de19fde66f4d04c535fd24f0775.

There is also a new feature in Node's Go API: it is now possible to
register arbitrary handlers on the user-facing HTTP server. In geth, this
facility is used to enable GraphQL.

There is a single minor change relevant for geth users in this PR: The
GraphQL API is no longer available separately from the JSON-RPC HTTP
server. If you want GraphQL, you need to enable it using the
./geth --http --graphql flag combination.

The --graphql.port and --graphql.addr flags are no longer available.
This commit is contained in:
rene
2020-08-03 19:40:46 +02:00
committed by GitHub
parent b2b14e6ce3
commit c0c01612e9
63 changed files with 2606 additions and 2887 deletions
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11
node/errors.go
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@ -39,17 +39,6 @@ func convertFileLockError(err error) error {
return err
}
// DuplicateServiceError is returned during Node startup if a registered service
// constructor returns a service of the same type that was already started.
type DuplicateServiceError struct {
Kind reflect.Type
}
// Error generates a textual representation of the duplicate service error.
func (e *DuplicateServiceError) Error() string {
return fmt.Sprintf("duplicate service: %v", e.Kind)
}
// StopError is returned if a Node fails to stop either any of its registered
// services or itself.
type StopError struct {