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# 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 <grufwub@gmail.com> Co-committed-by: kim <grufwub@gmail.com>
54 lines
1.7 KiB
JavaScript
54 lines
1.7 KiB
JavaScript
/*
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GoToSocial
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Copyright (C) GoToSocial Authors admin@gotosocial.org
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SPDX-License-Identifier: AGPL-3.0-or-later
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU Affero General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Affero General Public License for more details.
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You should have received a copy of the GNU Affero General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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import sha256 from "./sha256";
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let compute = async function(seedStr, challengeStr) {
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const textEncoder = new TextEncoder();
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let nonce = 0;
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while (true) { // eslint-disable-line no-constant-condition
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// Create possible solution string from challenge string + nonce.
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const solution = textEncoder.encode(seedStr + nonce.toString());
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// Generate hex encoded SHA256 hashsum of solution.
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const hashArray = Array.from(sha256(solution));
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const hashAsHex = hashArray.map(b => b.toString(16).padStart(2, "0")).join("");
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// Check whether hex encoded
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// solution matches challenge.
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if (hashAsHex == challengeStr) {
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return nonce;
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}
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// Iter.
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nonce++;
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}
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};
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onmessage = async function(e) {
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console.log('worker started'); // eslint-disable-line no-console
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// Compute nonce value that produces 'challenge' for seed.
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let nonce = await compute(e.data.seed, e.data.challenge);
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// Post the solution nonce back to caller.
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postMessage({ nonce: nonce, done: true });
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};
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