go-ethereum/mobile/doc.go
Felix Lange b628d72766
build: upgrade to go 1.19 (#25726)
This changes the CI / release builds to use the latest Go version. It also
upgrades golangci-lint to a newer version compatible with Go 1.19.

In Go 1.19, godoc has gained official support for links and lists. The
syntax for code blocks in doc comments has changed and now requires a
leading tab character. gofmt adapts comments to the new syntax
automatically, so there are a lot of comment re-formatting changes in this
PR. We need to apply the new format in order to pass the CI lint stage with
Go 1.19.

With the linter upgrade, I have decided to disable 'gosec' - it produces
too many false-positive warnings. The 'deadcode' and 'varcheck' linters
have also been removed because golangci-lint warns about them being
unmaintained. 'unused' provides similar coverage and we already have it
enabled, so we don't lose much with this change.
2022-09-10 13:25:40 +02:00

62 lines
3.1 KiB
Go

// Copyright 2016 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
// Package geth contains the simplified mobile APIs to go-ethereum.
//
// The scope of this package is *not* to allow writing a custom Ethereum client
// with pieces plucked from go-ethereum, rather to allow writing native dapps on
// mobile platforms. Keep this in mind when using or extending this package!
//
// # API limitations
//
// Since gomobile cannot bridge arbitrary types between Go and Android/iOS, the
// exposed APIs need to be manually wrapped into simplified types, with custom
// constructors and getters/setters to ensure that they can be meaningfully used
// from Java/ObjC too.
//
// With this in mind, please try to limit the scope of this package and only add
// essentials without which mobile support cannot work, especially since manually
// syncing the code will be unwieldy otherwise. In the long term we might consider
// writing custom library generators, but those are out of scope now.
//
// Content wise each file in this package corresponds to an entire Go package
// from the go-ethereum repository. Please adhere to this scoping to prevent this
// package getting unmaintainable.
//
// Wrapping guidelines:
//
// Every type that is to be exposed should be wrapped into its own plain struct,
// which internally contains a single field: the original go-ethereum version.
// This is needed because gomobile cannot expose named types for now.
//
// Whenever a method argument or a return type is a custom struct, the pointer
// variant should always be used as value types crossing over between language
// boundaries might have strange behaviors.
//
// Slices of types should be converted into a single multiplicative type wrapping
// a go slice with the methods `Size`, `Get` and `Set`. Further slice operations
// should not be provided to limit the remote code complexity. Arrays should be
// avoided as much as possible since they complicate bounds checking.
//
// If a method has multiple return values (e.g. some return + an error), those
// are generated as output arguments in ObjC. To avoid weird generated names like
// ret_0 for them, please always assign names to output variables if tuples.
//
// Note, a panic *cannot* cross over language boundaries, instead will result in
// an undebuggable SEGFAULT in the process. For error handling only ever use error
// returns, which may be the only or the second return.
package geth