Proposals

Create a new syscall that returns the leader for the current & the next slot. fn sol get leader(result: mut u8) - u64

Allow the Stake Program's existing DeactivateDelinquent instruction to deactivate stake delegated to a closed vote account. The delegated vote account is treated as closed when its address…

Replace floating-point arithmetic in consensus-critical inflation and rent calculations with deterministic integer arithmetic.

The partitioned epoch rewards process currently requires all stake accounts, including inactive stakes, to be considered when computing the lattice hash and rewards partition count. But…

Specify the protocol for validating chained block ids under both TowerBFT and Alpenglow.

This SIMD proposes changing the default behavior of program upgrades to automatically resize the program data account so that its ELF region matches the length of the ELF being deployed.…

Reduce the inflation schedule by increasing the disinflation rate from the current -15% rate to -30%.

We split the present static 5000-lamport per-signature fee (2500 burned, 2500 to the leader) into two components: Base inclusion fee — static 2500 lamports per transaction, paid entirely…

To allow for non-disruptive rent increases, the Solana runtime relaxes post-execution minimum balance checks and adjusts stake delegations during epoch rewards calculations. Relax…

This proposal aims to relax the handling of invalid fee-payers for blockhash transactions in Solana. Currently, if a transaction with an invalid fee-payer is included in a block, the…

This proposal introduces support for the secp256r1 (also known as NIST P-256) elliptic curve to Solana's existing generalized curve syscalls. These syscalls will expose: Group operations…

The current live transaction formats, v0 and legacy, have a number of limitations that make them unsuitable for efficient ingestion, processing, and unable to support developer features…

Add a sol big mod exp syscall that computes modular exponentiation over unsigned big integers: `text result = (base ^ exponent) mod modulus ` The syscall is analogous to Ethereum's…

Reduce Solana's target slot time from 400ms to 200ms in four feature-gated steps: 350ms slots 300ms slots 250ms slots 200ms slots Each step keeps ticks per slot fixed at 64, keeps leader…

A new "multi stake" account that allows for multiple movements of stake, useful for simpler stake movement through more activations, deactivations, or redelegation.

This SIMD describes the procedure for upgrading a Core BPF program that may have been migrated from a native builtin or otherwise deployed on-chain as a core program. Each individual Core…

This proposal introduces a new family of syscalls to provide native support for cryptographic operations on the BLS12-381 elliptic curve. These syscalls will expose: Group operations…

This SIMD proposes relaxing current constraints on program buffers used by the DeployWithMaxDataLen (initial deployment) and Upgrade (redeployment) instructions, currently requiring them…

This proposal specifies in detail how a BLS public key can be generated by users via updated existing tools and how they can put the generated BLS public keys into their vote accounts for…

Before a transaction can be executed, every account it may read from or write to must be loaded, including any programs it may call. The amount of data a transaction is allowed to load is…

Disable deployment of SBPFv0, SBPFv1 and SBPFv2.

This SIMD proposes changing the default behavior when closing upgradeable programs so that program accounts are fully reclaimed and their addresses become reusable. Tombstoning program…

Shred validation currently allows certain shreds that seem like they should be invalid. This leads to lots of corner cases when a new client bases their behavior on what Agave implicitly…

A new mechanism is proposed to allow validators to share part of their block revenue with their delegators. Commission rates from validator vote accounts will be used by the protocol to…

Introduce a sol sha512 syscall with an identical interface to sol sha256, producing SHA-512 hashes and outputting the 64-byte result.

Enforce a minimum extension size of 10,240 bytes (10 KiB) on the ExtendProgram instruction in Loader V3, mitigating the existing denial-of-service vector through economic deterrence while…

This SIMD introduces static syscalls, using the eBPF call instruction encoding, to remove runtime relocations while keeping compatibility with the eBPF encoding.

Transition the secp256k1 precompile and syscall implementation in the Agave validator client from the libsecp256k1 crate to the k256 crate. This is an Agave-specific upgrade, but make this…

Allow validators to specify custom commission collector accounts where block revenue and inflation rewards commissions will be deposited.

Allow validators to update their inflations reward commission rate with basis points and update commission calculation.

This SIMD will upgrade the Core BPF Stake Program to v5.0.0.

This proposal introduces the InitializeAccountV2 instruction to the Vote program, which allows creating new vote accounts with all vote state v4 fields — including BLS public keys — at…

Adding a precompile to support the verification of signatures generated on the secp256r1 curve. Analogous to the support for secp256k1 and ed25519 signatures that already exists in form of…

Replace the current version of SPL Token (TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA) program by a CU-optimized one (p-token).

This SIMD proposes replacing all IEEE-754 double-precision floating-point arithmetic within the Solana Stake Program & validator client's warmup/ cooldown logic with a fixed-point…

This proposal introduces a feature-gated mechanism for runtime-level migration of Loader v2 programs to Loader v3.

This proposal relaxes the requirements for runtime-level migrations of programs (such as builtins) to permit system-owned programdata accounts to hold lamports.

Serialize pointers for instruction accounts to allow direct account access without requiring parsing of the account section.

Extend the existing sol alt bn128 group op syscall to support native G2 curve point arithmetic (addition, subtraction, and scalar multiplication) on the BN254 curve.

Virtual address space related changes split off from SIMD-0219: Removing pitfalls and foot-guns from the ABI (including syscalls) and runtime.

Syscall parameter related changes split off from SIMD-0219: Removing pitfalls and foot-guns from the ABI (including syscalls) and runtime.

This proposal removes the use of statically defined compute unit (CU) costs for Simple Vote transactions and instead accounts for them in the same way as normal transactions when enforcing…

This proposal aims to eliminate the use of floating-point operations to determine whether an account is rent exempt or not in programs by deprecating the use of the exempt threshold (f64)…

Reduce lamports per byte incrementally from 6960 to 696 via five steps: 6333, 5080, 2575, 1322, and 696. This proposal supersedes SIMD-0436, providing a more granular reduction schedule.…

This SIMD imposes a hard restriction on the maximum number of account references that an instruction may declare. There is already a limit of 255 account references imposed during…

This proposal replaces the verify strict semantics used in Solana, derived from Agave's usage of ed25519-dalek's verify strict, with ZIP-215, Zebra's EdDSA variant. In practice, this…

This SIMD introduces instruction set architecture (ISA) changes to make the sBPF virtual machine compatible with the latest existing version of eBPF ISA generated by its LLVM backend. It…

The alt bn128 pairing syscall takes a byte slice as input, interprets the bytes as an array of pairs of g1 and g2 points on bn128 elliptic curve, and applies a pairing operation. If the…

Reduce lamports per byte by 50% to 3480, which is equivalent to reducing the rent-exempt minimum balance by half for all new and existing accounts. Requires SIMD-0392: Relaxation of…

Protective feature to increase rent-exempt minimum balance back to the legacy value of 6960 per-byte. This should only be activated in response to excessive state growth observed on…

Imposes more restrictions on what is expected of ELF headers.

Provide a pointer to instruction data in VM register 2 (r2) at program entrypoint, enabling direct access to instruction data without having to parse the accounts section of the serialized…

Currently the block ID (the merkle root of the last FEC set) of the snapshot slot is not included in the snapshot Bank Fields. This would enforce the snapshot producer to include the block…

This SIMD describes how the validator admission ticket (VAT) collection described in SIMD 326 will be implemented. Specifically, how it affects validator operation procedures. The…

Historically, messages transmitted over the network must not exceed the IPv6 MTU size to ensure a fast and reliable network delivery. Solana has used a conservative MTU size of 1280 bytes,…

Migrate to Alpenglow from TowerBFT

Add a new version of vote account state to support alpenglow, block revenue distribution, and commission improvements.

This proposal adds the bank hash to the block footer and introduces validity constraints to ensure the bank hash matches the expected value.

Raise the block limit from 48M to 50M CUs.

This proposal relaxes the handling of invalid durable nonce transactions during block replay. Instead of rejecting the entire block when an invalid nonce is encountered, the transaction…

A CreateAccountAllowPrefund instruction added to the system program reduces network overhead for applications that need to fund account rent (in whole or in part) in advance of account…

We propose augmenting BlockMarkerV1, introduced in SIMD-0307, to include BlockHeader and UpdateParent variants. BlockHeader, placed at the beginning of a block, indicates the parent of the…

Require all Poseidon hash inputs to have a fixed length determined by the number of bytes used by the modulus of a prime field. For the (currently the only supported) prime field BN254,…

Increase the maximum number of account info's for cross-program invoked (CPI) instructions from 64 to 255 and consume compute units for serialized account info's and instruction account…

Removing pitfalls and foot-guns from the ABI (including syscalls) and runtime.

Add a block footer to Solana blocks and expose footer fields in the getBlock rpc endpoint.

This proposal changes the core consensus protocol from the current one, based on Proof-of-History and TowerBFT , to Alpenglow , specifically the Votor parts of Alpenglow. Compared to the…

Reduce the number of ChaCha rounds for turbine weighted shuffle calculation from 20 to 8 in order to reduce the amount of compute time spent on this.

Remove the check which forces CPI callers to have the program account of the callee available to them as an instruction account.

This proposal outlines a new syscall interface for sysvars; one which can retrieve dynamic ranges of sysvar data without fully copying the entire data structure. With a unified syscall…

Award a variable number of vote credits per voted on slot, with more credits being given for votes that have "less latency" than votes that have "more latency".

All clients currently send 32 data + 32 coding shreds, however Turbine still allows to send and receive a variable number of shreds. With this change we will enforce sending and receiving…

Set the value of rent epoch—as serialized into the VM for transaction processing—to a constant.

With the introduction of the Accounts Lattice Hash (SIMD-215), the merkle-based Accounts Delta Hash is redundant and can be removed.

Use the Accounts Lattice Hash as the Snapshot Hash , which enables removing the merkle-based accounts hash calculation.

This proposal adds a new hash, Accounts Lattice Hash , that uses homomorphic hashing to maintain a hash of the total account state. The Accounts Lattice Hash is both fast to update, and…

Increase the maximum number of nested CPI calls.

Transactions will fail execution in SVM if the transactions use more than 64 instructions, including CPI calls. This proposal is to make transactions that use more than 64 top-level…

Increase the per account CU limit from a static 12M to 40% of the block CU limit.

Increase the block limit to 100M CUs.

There are some instructions with questionable encodings, that when slightly adjusted, could significantly simplify verification and execution of programs.

This proposal introduces wide multiplication, signed division and explicit sign extension to SBPF.

The advance nonce instruction in a transaction can currently specify any account in the transaction as the account to advance. This proposal would restrict the advance nonce instruction to…

As the new shred format is being sent by all clients, this feature deprecates the old shred format.

The SVM currently allocates a fixed amount of stack space to each function frame. We propose allowing programs to dynamically manage their stack space through the introduction of an…

Increase the block limit to 60M CUs.

Allow validators to update their commission rate at any time but delay those commission updates for at least one full epoch.

Extend the Alt-BN128 syscalls to add little endian support.

This proposal describes an enshrined on-chain program to verify proofs that a validator committed a slashable infraction. This program creates reports on chain for use in future SIMDs.…

This proposal aims to relax certain transaction errors related to loading transaction accounts, from protocol violations to runtime errors. Specifically, if a transaction fails to load a…

Do not rewrite accounts that are unchanged by rent collection.

Partitioned rent collection should be removed since it will no longer be useful after rent collection is disabled by https://github.com/solana-labs/solana/issues/33946…

Remove all checks of accounts is executable flag which can throw errors in the runtime.

The Solana protocol currently prohibits block producers from including transactions with precompile instructions that fail signature verification. This constraint is not ideal since block…

Deprecate the existing ZK Token Proof program that is tailored for the SPL Token program. Replace it with a more general zero-knowledge proof program called the ZK ElGamal Proof program…

Define a unified behavior for precompiles, and highlight a few minor changes to the existing precompiles to minimize differences.

Migrate bank snapshots to a new "epoch stakes" field in order to store additional stake state needed for calculating partitioned rewards.

Migrate the Config program to Core BPF.

Disables the legacy Vote, UpdateVoteState and CompactUpdateVoteState instruction variants.

Update the curve25519 syscalls functions from returning an error code 1 (Ok(1) in rust) to returning an error type Err(SyscallError::InvalidAttribute) when invoked on unsupported curve id…

Migrate the Address Lookup Table program to Core BPF.

A new way to distribute epoch rewards across multiple blocks is proposed to address the current performance problems associated with epoch reward distribution in a first block of a new…

The transaction scheduler and the runtime both demote transaction write locks for builtin programs and sysvars using a static list of reserved IDs. This proposal replaces the currently…

This proposal suggests replacing the non-existent native program at address Feature111111111111111111111111111111111111 with a Core BPF Program, as described in SIMD 0088. Feature accounts…

This proposal introduces the concept of Core BPF programs: programs which are essential to network operations. Currently, these exist as built-in programs known as "native" programs. This…

Add a new syscall to access the number of compute units that are left to use in a transaction.

The epoch leader schedule for block production will be migrated from being keyed by validator identity addresses to being keyed by vote account addresses. The expected block signer for a…

A syscall to retrieve a vote account's delegated stake or the total cluster stake for the current epoch.

Reward 100% of priority fee to validator.

The alt bn128 multiplication syscall takes in a byte slice as input, interprets the bytes as a bn128 elliptic curve point/scalar pair, and applies point-scalar multiplication. If the byte…

We propose introducing two new instructions to the stake program for moving value between stake accounts with identical Authorized and Lockup: MoveStake: Move a given amount of active…

Migrate the Stake program to Core BPF.

Adjusting how CU consumption is measured based on the conditions of transaction execution: successful completion will consume actual CUs, but certain irregular failures in the sBPF VM will…

When transactions do not request a specific compute unit limit, the Solana runtime conservatively allocates 200,000 compute units for each tx-level instruction (excluding compute budget…

During a cluster restart following an outage, make validators enter a separate recovery protocol that uses Gossip to exchange local status and automatically reach consensus on the block to…

Simplify the return error code for the family of Alt BN128 syscalls: sol alt bn128 group op, sol alt bn128 compression and sol poseidon. A single error code is sufficient, in line with all…

Disable BPF Loader V2 for program deployment.

Every validator defines a node id which is also used as the validator's fee-collector account for collecting earned protocol fees. After implementing this proposal, validator…

Add a new feature to disable rent fees collections.

Remove the constraint that transaction entries cannot contain conflicting transactions.

The commission updates only allowed in first half of epoch feature disallows commission decrease in the second half of epoch. Given that the purpose of this feature was to prevent 'rug…

Here we propose a mechanism for proving transaction inclusion into a block in the Solana protocol. This is a pre-requisite for several use-cases that would like to build upon a Simple…

Create a new syscall and sysvar that can be used to get the last restart slot. A new Sysvar : SysvarLastRestartS1ot1111111111111111111111 Method signature for syscall: fn sol get last…

A new way to distribute epoch rewards across multiple blocks is proposed to address the current performance problems associated with epoch reward distribution in a first block of a new…

3 levels of access, in the order of increasing access: Triage Requirement: One voucher from anyone with level 2 or above access. Write Requirement: One voucher from anyone with level 3…

Adding a Native Program to support the verification of signatures generated on the secp256r1 curve. Analogous to the support for secp256k1 and ed25519 signatures that already exists in…