[token22] Avoid the use of extend_from_slice when appending instructions
#7489
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joncinque
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Nov 13, 2024
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This is relevant when building the token22 program for wasm target. The Instruction type implements Clone for non-wasm targets, but does not seem to implement it for wasm targets (https://github.com/anza-xyz/agave/blob/master/sdk/instruction/src/lib.rs#L108).
Bah, this looks like it was a bug introduced in anza-xyz/agave#1658 -- there's no reason we shouldn't derive those for the wasm build. I'll put a fix in there. In the meantime, this change looks good!
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#### Problem As noticed in solana-labs/solana-program-library#7489, the wasm build for `Instruction` doesn't contain `Clone`. This is because we missed the derivations for the wasm version of `Instruction` in anza-xyz#1658. #### Summary of changes Looking back through that PR, I noticed that we only missed those additional derives on `Instruction`, so just fix those in `Instruction`. Since this is fixing a small regression for wasm builds, I think we should backport the change to v2.1.
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#### Problem As noticed in solana-labs/solana-program-library#7489, the wasm build for `Instruction` doesn't contain `Clone`. This is because we missed the derivations for the wasm version of `Instruction` in #1658. #### Summary of changes Looking back through that PR, I noticed that we only missed those additional derives on `Instruction`, so just fix those in `Instruction`. Since this is fixing a small regression for wasm builds, I think we should backport the change to v2.1.
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Nov 13, 2024
#### Problem As noticed in solana-labs/solana-program-library#7489, the wasm build for `Instruction` doesn't contain `Clone`. This is because we missed the derivations for the wasm version of `Instruction` in #1658. #### Summary of changes Looking back through that PR, I noticed that we only missed those additional derives on `Instruction`, so just fix those in `Instruction`. Since this is fixing a small regression for wasm builds, I think we should backport the change to v2.1. (cherry picked from commit d3bce9f)
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… (#3610) instruction: Derive everything for wasm build (#3606) #### Problem As noticed in solana-labs/solana-program-library#7489, the wasm build for `Instruction` doesn't contain `Clone`. This is because we missed the derivations for the wasm version of `Instruction` in #1658. #### Summary of changes Looking back through that PR, I noticed that we only missed those additional derives on `Instruction`, so just fix those in `Instruction`. Since this is fixing a small regression for wasm builds, I think we should backport the change to v2.1. (cherry picked from commit d3bce9f) Co-authored-by: Jon C <[email protected]>
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Problem
In the confidential mint and burn extension, the vector of proof instructions are appended to the token instruction using the
extend_from_slicemethod, which requires the underlying element type of the slice to implement theClonetrait. Though minimal, it is better to use theextendfunction that subsumes the input vector sinceextenddoes not require the underlying element type to be implement any trait.This is relevant when building the token22 program for wasm target. The
Instructiontype implementsClonefor non-wasm targets, but does not seem to implement it for wasm targets (https://github.com/anza-xyz/agave/blob/master/sdk/instruction/src/lib.rs#L108).Summary of Changes
Replace
extend_from_slicewithextend.