Crate rs_zephyr_sdk

Zephyr Rust SDK

The zephyr rust sdk aids developers in writing programs for the Zephyr Virtual Machine.

Hello Ledger Example

use rs_zephyr_sdk::{bincode, log, stellar_xdr::next::{Limits, WriteXdr}, Condition, DatabaseDerive, DatabaseInteract, EnvClient, ZephyrVal};
 
#[derive(DatabaseDerive, Clone)]
#[with_name("curr_seq")]
struct Sequence {
    pub current: u32,
}
 
#[no_mangle]
pub extern "C" fn on_close() {
   let env = EnvClient::new();
   let reader = env.reader();

   let sequence = Sequence {
       current: reader.ledger_sequence()
   };

   if let Some(last) = Sequence::read_to_rows(&env).iter().find(|x| x.current == sequence.current - 1) {
       sequence.update(&env, &[Condition::ColumnEqualTo("current".into(), bincode::serialize(&ZephyrVal::U32(last.current)).unwrap())]);
   } else {
       sequence.put(&env)
   }
}

Re-exports

• pub use soroban_sdk;
• pub use stellar_xdr;
• pub use bincode;

Modules

• utils
  Some sparse scval utils. Note that these might be deprecated in the future.

Structs

• AgnosticRequest
  A generic request object meant to be easily reusable by any HTTP client request.
• ContractDataEntry
• EntryChanges
  Represents all of the entry changes that happened in the ledger close.
• EnvClient
  Zephyr’s host environment client.
• MetaReader
  Ledger meta reader.
• TableRow
  Wraps a single row.
• TableRows
  Object returned by database reads. It’s a wrapper for table rows.

Enums

• Condition
  Condition clauses that can be applied when reading the database.
• Method
  Methods currently supported are Get and Post.
• SdkError
  Zephyr SDK errors.
• ZephyrVal

Traits

• DatabaseInteract

Derive Macros

• DatabaseDerive