feat(lazer): add client to solana example program

lazer/solana/Cargo.toml

@@ -7,13 +7,23 @@ edition = "2021"
 name = "pyth_lazer_solana_example"
 crate-type = ["cdylib", "lib"]
 
+[[bin]]
+name = "client"
+required-features = ["client"]
+
 [dependencies]
 pyth-lazer-sdk = "0.1.0"
 
 solana-program = "1.18.26"
 bytemuck = { version = "1.18.0", features = ["derive"] }
 num-traits = "0.2.19"
 num-derive = "0.4.2"
+solana-client = { version = "1.18", optional = true }
+anyhow = { version = "1.0.93", optional = true }
+solana-sdk = { version = "1.18.26", optional = true }
+hex = { version = "0.4.3", optional = true }
+pyth-lazer-solana-contract = { version = "0.1.0", optional = true }
+env_logger = { version = "0.11.5", optional = true }
 
 [dev-dependencies]
 hex = "0.4.3"
@@ -23,3 +33,12 @@ tokio = { version = "1.40.0", features = ["full"] }
 byteorder = "1.5.0"
 pyth-lazer-solana-contract = "0.1.0"
 anchor-lang = "0.30.1"
+
+[features]
+solana-client = ["dep:solana-client"]
+anyhow = ["dep:anyhow"]
+solana-sdk = ["dep:solana-sdk"]
+hex = ["dep:hex"]
+pyth-lazer-solana-contract = ["dep:pyth-lazer-solana-contract"]
+env_logger = ["dep:env_logger"]
+client = ["solana-client", "anyhow", "solana-sdk", "hex", "pyth-lazer-solana-contract", "env_logger"]

lazer/solana/src/bin/client.rs

@@ -0,0 +1,97 @@
+use {
+    anyhow::Context,
+    bytemuck::bytes_of,
+    pyth_lazer_sdk::ed25519_program_args,
+    pyth_lazer_solana_example::{InitializeArgs, Instruction as ExampleInstruction, UpdateArgs},
+    solana_client::rpc_client::RpcClient,
+    solana_sdk::{
+        instruction::{AccountMeta, Instruction},
+        message::Message,
+        pubkey::Pubkey,
+        signature::read_keypair_file,
+        signer::Signer,
+        system_program, sysvar,
+        transaction::Transaction,
+    },
+    std::env,
+};
+
+fn main() -> anyhow::Result<()> {
+    env_logger::init();
+    let client = RpcClient::new(env::var("SOLANA_RPC_URL")?);
+    let latest_blockhash = client.get_latest_blockhash()?;
+    let keypair = read_keypair_file(env::var("SOLANA_KEYPAIR_FILE")?).unwrap();
+    let program_id: Pubkey = env::var("EXAMPLE_PROGRAM_PUBKEY")?.parse()?;
+
+    let (data_pda_key, _) = Pubkey::find_program_address(&[b"data"], &program_id);
+    let cmd = env::args().nth(1).context("missing arg")?;
+
+    if cmd == "init" {
+        let mut init_data = vec![ExampleInstruction::Initialize as u8];
+        init_data.extend_from_slice(bytes_of(&InitializeArgs { price_feed_id: 2 }));
+
+        let tx = Transaction::new(
+            &[&keypair],
+            Message::new(
+                &[Instruction::new_with_bytes(
+                    program_id,
+                    &init_data,
+                    vec![
+                        AccountMeta::new(keypair.pubkey(), true),
+                        AccountMeta::new(data_pda_key, false),
+                        AccountMeta::new_readonly(system_program::ID, false),
+                    ],
+                )],
+                Some(&keypair.pubkey()),
+            ),
+            latest_blockhash,
+        );
+        let signature = client.send_and_confirm_transaction(&tx)?;
+        println!("OK {signature:?}");
+    } else if cmd == "update" {
+        let message = hex::decode(env::var("LAZER_UPDATE_HEX")?)?;
+        let mut update_data = vec![ExampleInstruction::Update as u8];
+        update_data.extend_from_slice(bytes_of(&UpdateArgs { hello: 42 }));
+        update_data.extend_from_slice(&message);
+
+        // Instruction #0 will be ed25519 instruction;
+        // Instruction #1 will be our contract instruction.
+        let instruction_index = 1;
+        // Total offset of Pyth Lazer update within the instruction data;
+        // 1 byte is the instruction type.
+        let message_offset = (size_of::<UpdateArgs>() + 1).try_into().unwrap();
+        let ed25519_args =
+            pyth_lazer_sdk::signature_offsets(&update_data, instruction_index, message_offset);
+        let tx = Transaction::new(
+            &[&keypair],
+            Message::new(
+                &[
+                    Instruction::new_with_bytes(
+                        solana_program::ed25519_program::ID,
+                        &ed25519_program_args(&[ed25519_args]),
+                        vec![],
+                    ),
+                    Instruction::new_with_bytes(
+                        program_id,
+                        &update_data,
+                        vec![
+                            AccountMeta::new_readonly(sysvar::instructions::ID, false),
+                            AccountMeta::new(data_pda_key, false),
+                            AccountMeta::new_readonly(
+                                pyth_lazer_solana_contract::storage::ID,
+                                false,
+                            ),
+                        ],
+                    ),
+                ],
+                Some(&keypair.pubkey()),
+            ),
+            latest_blockhash,
+        );
+        let signature = client.send_and_confirm_transaction(&tx)?;
+        println!("OK {signature:?}");
+    } else {
+        panic!("unknown cmd");
+    }
+    Ok(())
+}