From 326e04283a2536d64a7055bfef184f5817b691d6 Mon Sep 17 00:00:00 2001 From: kim Date: Mon, 26 May 2025 11:57:50 +0200 Subject: [feature] update proof-of-work to allow setting required rounds (#4186) # Description This updates our proof-of-work middleware, NoLLaMas, to work on a more easily configurable algorithm (thank you f0x for bringing this to my attention!). Instead of requiring that a solution with pre-determined number of '0' chars be found, it now pre-computes a result with a pre-determined nonce value that it expects the client to iterate up-to. (though with some level of jitter applied, to prevent it being too-easily gamed). This allows the user to configure roughly how many hash-encode rounds they want their clients to have to complete. ## Checklist - [x] I/we have read the [GoToSocial contribution guidelines](https://codeberg.org/superseriousbusiness/gotosocial/src/branch/main/CONTRIBUTING.md). - [x] I/we have discussed the proposed changes already, either in an issue on the repository, or in the Matrix chat. - [x] I/we have not leveraged AI to create the proposed changes. - [x] I/we have performed a self-review of added code. - [x] I/we have written code that is legible and maintainable by others. - [x] I/we have commented the added code, particularly in hard-to-understand areas. - [x] I/we have made any necessary changes to documentation. - [ ] I/we have added tests that cover new code. - [x] I/we have run tests and they pass locally with the changes. - [x] I/we have run `go fmt ./...` and `golangci-lint run`. Reviewed-on: https://codeberg.org/superseriousbusiness/gotosocial/pulls/4186 Co-authored-by: kim Co-committed-by: kim --- vendor/codeberg.org/gruf/go-bitutil/abs.go | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) create mode 100644 vendor/codeberg.org/gruf/go-bitutil/abs.go (limited to 'vendor/codeberg.org/gruf/go-bitutil/abs.go') diff --git a/vendor/codeberg.org/gruf/go-bitutil/abs.go b/vendor/codeberg.org/gruf/go-bitutil/abs.go new file mode 100644 index 000000000..f4ce8ad75 --- /dev/null +++ b/vendor/codeberg.org/gruf/go-bitutil/abs.go @@ -0,0 +1,29 @@ +package bitutil + +// Abs8 returns the absolute value of i (calculated without branching). +func Abs8(i int8) int8 { + const bits = 8 + u := uint64(i >> (bits - 1)) + return (i ^ int8(u)) + int8(u&1) +} + +// Abs16 returns the absolute value of i (calculated without branching). +func Abs16(i int16) int16 { + const bits = 16 + u := uint64(i >> (bits - 1)) + return (i ^ int16(u)) + int16(u&1) +} + +// Abs32 returns the absolute value of i (calculated without branching). +func Abs32(i int32) int32 { + const bits = 32 + u := uint64(i >> (bits - 1)) + return (i ^ int32(u)) + int32(u&1) +} + +// Abs64 returns the absolute value of i (calculated without branching). +func Abs64(i int64) int64 { + const bits = 64 + u := uint64(i >> (bits - 1)) + return (i ^ int64(u)) + int64(u&1) +} -- cgit v1.2.3