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Merge pull request #1209 from MaxTomahawk/fix/checkpoint-engine-version-restore

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fix(mods): allow checkpoint restore across engine versions
This commit is contained in:
bryanthaboi
2026-08-13 05:35:05 -04:00
committed by GitHub
parent 1010d0584a a68c47e7e1
commit 62b9f04191
2 changed files with 25 additions and 1 deletions
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src/core/Checkpoint.lua
+12
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@@ -313,6 +313,16 @@ local function equalData(a, b)
return okA and okB and encodedA == encodedB
end
local function normalizeVerificationMetadata(actual, expected)
if type(actual) == "table" and type(actual.identity) == "table"
and type(expected) == "table" and type(expected.identity) == "table" then
-- RFC 0004 treats engineVersion as compatibility metadata, not runtime
-- state. A fresh recapture stamps the running engine, so normalize only
-- that metadata before differential verification.
actual.identity.engineVersion = expected.identity.engineVersion
end
end
local function firstDifference(a, b, path)
path = path or "$"
if type(a) ~= type(b) then return path .. " (type)" end
@@ -394,6 +404,7 @@ function Checkpoint.restore(game, checkpoint)
if ok then
local restored, verifyCode = Checkpoint.capture(game)
if restored and validated.rng == nil then restored.rng = nil end
normalizeVerificationMetadata(restored, validated)
if restored and equalData(restored, validated) then
emitRestored(game, validated)
return true
@@ -474,6 +485,7 @@ function Checkpoint.resume(game, checkpoint)
if ok then
local restored, verifyCode = Checkpoint.capture(game)
if restored and validated.rng == nil then restored.rng = nil end
normalizeVerificationMetadata(restored, validated)
if restored and equalData(restored, validated) then
emitRestored(game, validated)
return true