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Fix a bug where a message packer that requires multiple iterations is not correctly added to a transaction#1256

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mcintyre94 merged 2 commits into
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message-packer-fix
Jan 27, 2026
Merged

Fix a bug where a message packer that requires multiple iterations is not correctly added to a transaction#1256
mcintyre94 merged 2 commits into
mainfrom
message-packer-fix

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Problem

In the case where fitEntirePlanInsideMessage is used on a MessagePackerInstructionPlan, we iterate over the message packer until it is done (or throws). But these iterations were not being accumulated correctly, and only the last iteration would actually be applied.

This is an edge case, because a well implemented message packer will fill the transaction in only one call, and usually they're not forced into a single transaction.

Summary of Changes

  • Fix the bug, by passing the message that is being built iteratively into packMessageToCapacity
  • Add a new test for this case. This uses a message packer that only adds one instruction at a time when packMessageToCapacity is called.

Aside: spotted this because an AI tab complete model suggested changing it, and was correct for once!

@mcintyre94 mcintyre94 requested a review from lorisleiva January 27, 2026 15:47
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changeset-bot Bot commented Jan 27, 2026

🦋 Changeset detected

Latest commit: 282b517

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 43 packages
Name Type
@solana/instruction-plans Patch
@solana/kit Patch
@solana/accounts Patch
@solana/addresses Patch
@solana/assertions Patch
@solana/codecs-core Patch
@solana/codecs-data-structures Patch
@solana/codecs-numbers Patch
@solana/codecs-strings Patch
@solana/codecs Patch
@solana/compat Patch
@solana/errors Patch
@solana/fast-stable-stringify Patch
@solana/functional Patch
@solana/instructions Patch
@solana/keys Patch
@solana/nominal-types Patch
@solana/offchain-messages Patch
@solana/options Patch
@solana/plugin-core Patch
@solana/programs Patch
@solana/promises Patch
@solana/react Patch
@solana/rpc-api Patch
@solana/rpc-graphql Patch
@solana/rpc-parsed-types Patch
@solana/rpc-spec-types Patch
@solana/rpc-spec Patch
@solana/rpc-subscriptions-api Patch
@solana/rpc-subscriptions-channel-websocket Patch
@solana/rpc-subscriptions-spec Patch
@solana/rpc-subscriptions Patch
@solana/rpc-transformers Patch
@solana/rpc-transport-http Patch
@solana/rpc-types Patch
@solana/rpc Patch
@solana/signers Patch
@solana/subscribable Patch
@solana/sysvars Patch
@solana/transaction-confirmation Patch
@solana/transaction-messages Patch
@solana/transactions Patch
@solana/webcrypto-ed25519-polyfill Patch

Not sure what this means? Click here to learn what changesets are.

Click here if you're a maintainer who wants to add another changeset to this PR

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bundlemon Bot commented Jan 27, 2026

BundleMon

Unchanged files (136)
Status Path Size Limits
@solana/kit production bundle
kit/dist/index.production.min.js
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rpc-graphql/dist/index.browser.mjs
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rpc-graphql/dist/index.native.mjs
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rpc-graphql/dist/index.node.mjs
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errors/dist/index.node.mjs
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errors/dist/index.browser.mjs
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errors/dist/index.native.mjs
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transaction-messages/dist/index.browser.mjs
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transaction-messages/dist/index.native.mjs
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offchain-messages/dist/index.browser.mjs
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codecs-data-structures/dist/index.native.mjs
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codecs-data-structures/dist/index.node.mjs
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codecs-core/dist/index.native.mjs
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codecs-core/dist/index.node.mjs
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rpc-subscriptions/dist/index.browser.mjs
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react/dist/index.browser.mjs
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addresses/dist/index.node.mjs
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signers/dist/index.browser.mjs
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codecs-numbers/dist/index.node.mjs
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rpc-transport-http/dist/index.browser.mjs
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Total files change -7B 0%

Final result: ✅

View report in BundleMon website ➡️


Current branch size history | Target branch size history

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Documentation Preview: https://kit-docs-r4toc8ya7-anza-tech.vercel.app

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🤦‍♂️ Sorry for this pretty critical typo. Thank you Claude for discovering it and Callum for implementing it with a very thorough test! 🙏

@mcintyre94 mcintyre94 added this pull request to the merge queue Jan 27, 2026
Merged via the queue into main with commit cccea6f Jan 27, 2026
15 checks passed
@mcintyre94 mcintyre94 deleted the message-packer-fix branch January 27, 2026 17:46
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🔎💬 Inkeep AI search and chat service is syncing content for source 'Solana Kit Docs'

@github-actions github-actions Bot mentioned this pull request Jan 27, 2026
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Because there has been no activity on this PR for 14 days since it was merged, it has been automatically locked. Please open a new issue if it requires a follow up.

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2 participants