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When sending a transaction, in the wallet confirmation step, in some programs ?the wallet? seems to recognize what the instruction does, whereas in others it just lists the accounts that get written to.

  • What entity is responsible for identifying what a particular instruction does (wallet provider?/solana?), and can that data be passed in somehow ?

Judging from @solana/web3.js docs, there's nothing that can be passed there to add metadata to the instruction.

I'm sure it would be of great use to the community to have more specific/human readable and verifiable transaction data versus blindly trusting 'unknown instructions'.

Can someone help me ?

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Instruction data is opaque to the runtime. Only the declaring program knows how to interpret it. Every program that a wallet (or explorer, etc) can display instruction or account data for has an explicit parser implementation

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