Proof of History (PoH)
部署上去的合约通过 sdk 或者 cli 进行通信
通过 sdk 编写 dapp
pub struct Account {
/// lamports in the account
pub lamports: u64,
/// data held in this account
#[serde(with = "serde_bytes")]
pub data: Vec<u8>,
/// the program that owns this account. If executable, the program that loads this account.
pub owner: Pubkey,
/// this account's data contains a loaded program (and is now read-only)
pub executable: bool,
/// the epoch at which this account will next owe rent
pub rent_epoch: Epoch,
}
账号，就是一串Ed25519的私钥
用户账号的地址, 则是这私钥对应的公钥
key-pair
公钥 + 密码 得到 私钥, 再用私钥操作 Account
指令的打包，所以起内容主要就是各个交易指令，以及相应指令对应的发起人和签名
Transaction 定义：Code
pub struct Message {
/// The message header, identifying signed and read-only `account_keys`.
/// Header values only describe static `account_keys`, they do not describe
/// any additional account keys loaded via address table lookups.
pub header: MessageHeader,
/// List of accounts loaded by this transaction.
#[serde(with = "short_vec")]
pub account_keys: Vec<Pubkey>,
/// The blockhash of a recent block.
pub recent_blockhash: Hash,
/// Instructions that invoke a designated program, are executed in sequence,
/// and committed in one atomic transaction if all succeed.
///
/// # Notes
///
/// Program indexes must index into the list of message `account_keys` because
/// program id's cannot be dynamically loaded from a lookup table.
///
/// Account indexes must index into the list of addresses
/// constructed from the concatenation of three key lists:
/// 1) message `account_keys`
/// 2) ordered list of keys loaded from `writable` lookup table indexes
/// 3) ordered list of keys loaded from `readable` lookup table indexes
#[serde(with = "short_vec")]
pub instructions: Vec<CompiledInstruction>,
/// List of address table lookups used to load additional accounts
/// for this transaction.
#[serde(with = "short_vec")]
pub address_table_lookups: Vec<MessageAddressTableLookup>,
}
pub enum VersionedMessage {
Legacy(LegacyMessage),
V0(v0::Message),
}
pub struct VersionedTransaction {
/// List of signatures
#[serde(with = "short_vec")]
pub signatures: Vec<Signature>,
/// Message to sign.
pub message: VersionedMessage,
}
交易指令 (Instruction) 定义：Code
程序 id, account 资源, data 数据
pub struct CompiledInstruction {
/// Index into the transaction keys array indicating the program account that executes this instruction.
pub program_id_index: u8,
/// Ordered indices into the transaction keys array indicating which accounts to pass to the program.
#[serde(with = "short_vec")]
pub accounts: Vec<u8>,
/// The program input data.
#[serde(with = "short_vec")]
pub data: Vec<u8>,
}
一般合约，他的 Owner 都是BPF Loader
Token合约 → SPL Token Program
Solana 区块链引入了一种独特的资金模型来处理账户存储空间的费用，称为“租金”（Rent）
在以太坊中，普通代币被一个叫 ERC20 的提案定了规范，可以认为普通代币合约统一叫做 ERC20 代币，在 Solana 中，这个 ERC20 代币就是 SPL 代币