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Some transactions fail to execute/build due to being too large, so what's the maximum size?

1 Answer 1

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Answering my own question to help others:

Taking from the Solana docs:

Messages transmitted to Solana validators must not exceed the IPv6 MTU size to ensure fast and reliable network transmission of cluster info over UDP. Solana's networking stack uses a conservative MTU size of 1280 bytes which, after accounting for headers, leaves 1232 bytes for packet data like serialized transactions.

i.e. the maximum size of a transaction is 1232 bytes.

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