https://github.com/xandkar/solana-echo-dyn

Illustrates dynamic buffer account allocation. Client in Rust.
https://github.com/xandkar/solana-echo-dyn

Last synced: 7 months ago
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Illustrates dynamic buffer account allocation. Client in Rust.

• Host: GitHub
• URL: https://github.com/xandkar/solana-echo-dyn
• Owner: xandkar
• License: bsd-3-clause
• Created: 2022-08-19T16:07:26.000Z (about 3 years ago)
• Default Branch: dominus
• Last Pushed: 2022-08-19T20:52:06.000Z (about 3 years ago)
• Last Synced: 2024-10-19T03:06:37.998Z (12 months ago)
• Language: Rust
• Size: 38.1 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README
  • License: LICENSE

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README

          
solana echo dynamic

===================

In hello-world[1], the program simply logs that it has received something from

the client, but does nothing else, for any instruction data whatsoever.

ping-pong[2] escalates the complexity to program parsing the client request and

writing a response into the client-provided buffer account, which the client

proceeds to read.

Here, in echo, we both simplify from ping-pong and escalate complexity from

both ping-pong and hello-world in a different way. Like in hello-world, we pass

raw, unserialized data from client to program.  But unlike hello-world and like

ping-pong, the program also writes data to a buffer account, from which client

then reads.

However, unlike either, the buffer account is freshly allocated for each

clint<->program exchange, in order to support arbitrary-length input from the

user (since an account's data length cannot be changed once allocated).

If all goes well, your interactive session would look something like this:

    airdrop requesting.

    airdrop confirming .....

    airdrop done

    > hi

    < hi

    : 61UH7E6V8paqMryHuthhNX64FhnsyZyyE3gda75AUMpryxX7MxfedKz3xqxUiW3t1pAogs4G7XcixfYV6Rc6c5LA

    > foo bar baz qux quux

    < foo bar baz qux quux

    : 5bPPAoJkcTEtXdu2qKybsCjNJ5BefEtehhB6nkzT2Z8Bqo4iGhbrew4GqPxwAzhAApSUB1EaMfoLajJ7zSYwSo67

    > - "Do you like apples?"

    < - "Do you like apples?"

    : 2hvDgarxgpGtYGdmm9vCjBjrGhjbtr2Q86PwwUEHmdYi53Rit3jfEEnrHvkzqwxKd1L5U9Egv5iZDF7s9pibaF77

    >

[1]: https://github.com/xandkar/solana-hello-world

[2]: https://github.com/xandkar/solana-ping-pong

build

-----

    make build

run

---

### local

    $ solana-test-validator&

    $ make all

### devnet

    $ CLUSTER=dev make all

### testnet

    $ CLUSTER=test make all