The account designated to pay the transaction fee, always the first signer listed in the transaction's account keys array. The fee account must hold enough SOL to cover the base fee (5,000 lamports per signature) plus any priority fee. If the fee account's balance is insufficient, the transaction is rejected before execution.
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The account designated to pay the transaction fee, always the first signer listed in the transaction's account keys array. The fee account must hold enough SOL to cover the base fee (5,000 lamports per signature) plus any priority fee. If the fee account's balance is insufficient, the transaction is rejected before execution.
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Accounts, instructions, PDAs, transactions, and execution flow.
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Fee Account (fee-account) Category: Programming Model Definition: The account designated to pay the transaction fee, always the first signer listed in the transaction's account keys array. The fee account must hold enough SOL to cover the base fee (5,000 lamports per signature) plus any priority fee. If the fee account's balance is insufficient, the transaction is rejected before execution. Related: Transaction, Base Fee, Lamport
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An atomic unit of execution containing one or more instructions, a recent blockhash, and one or more signatures. All instructions in a transaction execute sequentially and atomically—if any instruction fails, the entire transaction reverts. Transactions have a 1,232-byte size limit (matching IPv6 MTU) and a default 200,000 CU budget.
The fixed, non-negotiable minimum fee charged per transaction signature on Solana, currently set at 5,000 lamports (0.000005 SOL) per signature. A transaction with N signatures pays N × 5,000 lamports as a base fee regardless of compute usage or network load. Fifty percent of the base fee is burned and fifty percent is paid to the current slot leader, making Solana mildly deflationary with usage.
The smallest unit of SOL, named after Leslie Lamport. 1 SOL = 1,000,000,000 (10^9) lamports. All balances and transfers on Solana are denominated in lamports internally. The minimum balance for an account to be rent-exempt is calculated in lamports based on the account's data size.
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The fundamental data storage unit on Solana. Every piece of state is stored in an account identified by a 32-byte public key. Accounts hold a lamport balance, an owner program, a data byte array (up to 10MB), and an executable flag. Only the owning program can modify an account's data, but anyone can credit lamports to it.
The byte array stored in an account that holds program-specific state. Data is typically serialized using Borsh and must be explicitly allocated at account creation. The maximum data size is 10MB. Programs are responsible for defining and managing their own data layout, including discriminators for type identification.
A temporary account used during Solana program deployment to hold the program's ELF binary before it is written to the program data account. The deployer creates a buffer account, uploads the compiled SBF binary in chunks via the Upgradeable BPF Loader's Write instruction, and then issues a Deploy or Upgrade instruction that copies the buffer contents to the final program data account. Buffer accounts can be closed after deployment to reclaim rent.
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An atomic unit of execution containing one or more instructions, a recent blockhash, and one or more signatures. All instructions in a transaction execute sequentially and atomically—if any instruction fails, the entire transaction reverts. Transactions have a 1,232-byte size limit (matching IPv6 MTU) and a default 200,000 CU budget.
The fixed, non-negotiable minimum fee charged per transaction signature on Solana, currently set at 5,000 lamports (0.000005 SOL) per signature. A transaction with N signatures pays N × 5,000 lamports as a base fee regardless of compute usage or network load. Fifty percent of the base fee is burned and fifty percent is paid to the current slot leader, making Solana mildly deflationary with usage.
The smallest unit of SOL, named after Leslie Lamport. 1 SOL = 1,000,000,000 (10^9) lamports. All balances and transfers on Solana are denominated in lamports internally. The minimum balance for an account to be rent-exempt is calculated in lamports based on the account's data size.
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The fundamental data storage unit on Solana. Every piece of state is stored in an account identified by a 32-byte public key. Accounts hold a lamport balance, an owner program, a data byte array (up to 10MB), and an executable flag. Only the owning program can modify an account's data, but anyone can credit lamports to it.
Executable code deployed on-chain, equivalent to a smart contract on other blockchains. Programs are stateless—they store no data themselves but read/write data in separate accounts they own. Programs are compiled to SBF bytecode and loaded via the BPF Loader. Every program has a unique Program ID (its account's public key).
A single operation within a transaction that invokes a program. An instruction specifies: (1) the program ID to call, (2) an array of account metas (pubkey, is_signer, is_writable), and (3) an opaque data byte array. Programs decode the instruction data to determine which operation to perform.
An atomic unit of execution containing one or more instructions, a recent blockhash, and one or more signatures. All instructions in a transaction execute sequentially and atomically—if any instruction fails, the entire transaction reverts. Transactions have a 1,232-byte size limit (matching IPv6 MTU) and a default 200,000 CU budget.