Solana SDK small crates migration guide

In 2024 and 2025, the solana-sdk and solana-program Rust crates were split up into 100 small crates, so developers could pull in only what they needed. For example, if you want the Signature type, you can now use solana-signature instead of pulling in all of solana-sdk (though solana-sdk and solana-program are still available).

On top of this, the new crates made heavy dependencies like serde and borsh optional and disabled by default, so people don't compile these dependencies unless they enable the relevant features of the SDK crates.

This is a big win for compile times and dependency hell, but to take advantage of it you need to switch to the new crates. This is fairly simple since most moves are quite obvious e.g. solana_sdk::account moved to solana_account. The full migration list is provided below, with notes for anything less obvious:

Old path	New path	Notes
solana_sdk::account	solana_account	Much of this is behind the bincode feature
solana_program::account_info	solana_account_info
solana_program::address_lookup_table	solana_address_lookup_table_interface
solana_program::big_mod_exp	solana_big_mod_exp
solana_program::program_utils	solana_bincode
solana_program::blake3	solana_blake3_hasher
solana_sdk::alt_bn128	solana_bn254
solana_program::borsh	solana_borsh::deprecated
solana_program::borsh0_10	solana_borsh::v0_10
solana_program::borsh1	solana_borsh::v1
solana_sdk::client	solana_client_traits
solana_program::clock	solana_clock	Activate the sysvar feature for sysvar impl
solana_sdk::genesis_config::ClusterType	solana_cluster_type::ClusterType
solana_sdk::commitment_config	solana_commitment_config
solana_sdk::compute_budget	solana_compute_budget_interface
solana_program::program	solana_cpi	The new crate doesn't support program stubs
solana_program::decode_error	solana_decode_error
solana_program::syscalls	solana_define_syscall	Some of the syscall definitions live in other places e.g. solana_msg::syscalls
solana_sdk::derivation_path	solana_derivation_path
solana_sdk::ed25519_instruction	solana_ed25519_program
solana_sdk::epoch_info	solana_epoch_info
solana_program::epoch_rewards	solana_epoch_rewards	Activate the sysvar feature for sysvar impl
solana_sdk::epoch_rewards_hasher	solana_epoch_rewards_hasher
solana_program::epoch_schedule	solana_epoch_schedule	Activate the sysvar feature for sysvar impl
solana_sdk::example_mocks	solana_example_mocks
solana_program::feature	solana_feature_gate_interface
solana_sdk::feature_set	solana_feature_set	Use agave-feature-set crate instead
solana_sdk::fee_calculator	solana_fee_calculator
solana_sdk::fee	solana_fee_structure
solana_sdk::genesis_config	solana_genesis_config
solana_sdk::hard_forks	solana_hard_forks
solana_program::hash	solana_hash
solana_sdk::inflation	solana_inflation
solana_program::instruction	solana_instruction
solana_program::sysvar::instructions	solana_instructions_sysvar
solana_program::keccak	solana_keccak_hasher
solana_sdk::keypair	solana_keypair	Some functionality is behind the seed-derivable feature
solana_program::last_restart_slot	solana_last_restart_slot	Activate the sysvar feature for sysvar impl
solana_program::loader_instruction	solana_loader_v2_interface
solana_program::bpf_loader_upgradeable	solana_loader_v3_interface
solana_program::loader_v4	solana_loader_v4_interface
solana_program::message	solana_message	Much is behind the serde, bincode and blake3 features
solana_program::msg	solana_msg::msg
solana_program::native_token	solana_native_token
solana_program::nonce	solana_nonce
solana_sdk::nonce_account	solana_nonce_account
solana_sdk::offchain_message	solana_offchain_message
solana_sdk::packet	solana_packet
solana_sdk::poh_config	solana_poh_config
solana_sdk::precompiles::PrecompileError	solana_precompile_error::PrecompileError
solana_sdk::precompiles	solana_precompiles
solana_sdk::signer::presigner	solana_presigner
solana_program::entrypoint	solana_program_entrypoint
solana_program::program_error	solana_program_error
solana_program::program_memory	solana_program_memory
solana_program::program_option	solana_program_option
solana_program::program_pack	solana_program_pack
solana_program::pubkey	solana_pubkey
solana_sdk::quic	solana_quic_definitions
solana_program::rent	solana_rent	Activate the sysvar feature for sysvar impl
solana_sdk::rent_collector	solana_rent_collector
solana_sdk::rent_debits	solana_rent_debits
solana_sdk::reserved_account_keys	solana_reserved_account_keys	Use agave-reserved-account-keys crate instead
solana_sdk::reward_info::RewardInfo	solana_reward_info::RewardInfo
solana_sdk::reward_type::RewardType	solana_reward_info::RewardType
solana_program::sanitize	solana_sanitize
solana_program::secp256k1_recover	solana_secp256k1_recover
solana_sdk::signer::keypair::keypair_from_seed_and_derivation_path	solana_seed_derivable::keypair_from_seed_and_derivation_path
solana_sdk::signer::keypair::generate_seed_from_seed_phrase_and_passphrase	solana_seed_phrase::generate_seed_from_seed_phrase_and_passphrase
solana_sdk::deserialize_utils	solana_serde
solana_program::serde_varint	solana_serde_varint
solana_sdk::serialize_utils	solana_serialize_utils
solana_program::hash::{extend_and_hash, hash, hashv, Hasher}	solana_sha256_hasher::{extend_and_hash, hash, hashv, Hasher}
solana_program::short_vec	solana_short_vec
solana_sdk::shred_version	solana_shred_version
solana_sdk::signature	solana_signature	solana_sdk::signature contained re-exports from the keypair module. These are not available in solana-signature, only in solana-keypair
solana_sdk::signer	solana_signer
solana_program::slot_hashes	solana_slot_hashes	Activate the sysvar feature for sysvar impl
solana_program::slot_history	solana_slot_history	Activate the sysvar feature for sysvar impl
solana_program::stable_layout	solana_stable_layout
solana_program::stake::{config, stake_flags, state, tools, MINIMUM_DELINQUENT_EPOCHS_FOR_DEACTIVATION}	solana_stake_interface::{config, stake_flags, state, tools, MINIMUM_DELINQUENT_EPOCHS_FOR_DEACTIVATION}
solana_program::stake::instruction	solana_stake_interface::{error::StakeError, instruction}
solana_program::system_instruction	solana_system_interface::{error::SystemError, instruction, MAX_PERMITTED_ACCOUNTS_DATA_ALLOCATIONS_PER_TRANSACTION, MAX_PERMITTED_DATA_LENGTH}
solana_program::system_transaction	solana_system_transaction
solana_program::sysvar	solana_sysvar
solana_program::{declare_deprecated_sysvar_id, declare_sysvar_id}	solana_sysvar_id::{declare_deprecated_sysvar_id, declare_sysvar_id}
solana_sdk::timing	solana_time_utils
solana_sdk::transaction	solana_transaction
solana_sdk::{AddressLoaderError, SanitizeMessageError, TransactionError, TransactionResult as Result, TransportError, TransportResult}	solana_transaction_error
solana_sdk::transaction_context	solana_transaction_context
solana_sdk::exit	solana_validator_exit
solana_program::vote	solana_vote_interface

Tip for codebases: a mechanical rename pattern works for the vast majority of paths:
solana_sdk::<module> → solana_<module> and
solana_program::<module> → same, but start from solana_program.

SDK IDs

The new solana-sdk-ids crate provides a central source for various program IDs definitions that were scattered around solana_sdk. For example the incinerator ID is available at solana_sdk_ids::incinerator::ID.