Problem

Now that the sdk is decoupled from agave, we have a lot more freedom to make breaking changes in individual crates.

However, there are still a lot of users of the omnibus crates solana-sdk and solana-program, and although we can simply stop updating them ever again, that would cause a lot of churn for downstream developers.

This issue aims to bundle together all of the breaking changes for the next breaking release of solana-sdk and solana-program.

Deprecations

• solana-sdk: deprecate modules migrated to agave #94
• deprecate solana-feature-set-interface crate #99
• program-error: Deprecate PrintProgramError #102
• Deprecate everything post feature-set migration #101
  • precompiles / feature-set / reserved-accounts-keys: remove completely
  • transaction: deprecate "precompiles" feature and funcs
  • "verify" functions from precompiles
• keypair / signature / ed25519: Deprecate dalek types from public API #107
• secp256k1: Deprecate libsecp256k1 from public interface #114
• secp256r1: Deprecate openssl types in public API #126
• keypair: Deprecate generate to avoid public rand dep #166
• Deprecate re-exports more loudly #151

Breaking changes in solana-program

• program-error!: Make ProgramError compatible with pinocchio #12
• Replace std::error::Error with core::error::Error #116
• msg!: make std optional #105
• program-memory!: Add missing unsafe #120
• remove solana-decode-error #104
• program-error!: Improve ToStr ergonomics #189
• program-entrypoint!: Space efficient custom panic #142
• program!: Remove all re-exports, update changelog #194
• account-info!: Rename rent_epoch to _unused #225
• all!: Remove deprecated functions and structs #229
• borsh!: Remove borsh v0.10 support #230
• hash!: Unify all hash types, introduce "offchain" feature #236
• sha256-hasher: Remove extend_and_hash #253
• {instruction,program}error!: remove unused std features #256
• address!: Remove num-traits impls from AddressError #271
• vote-interface: rename current to v3 #278

Breaking changes in solana-sdk

All the changes in solana-program, plus:

• solana-transaction-error missed a major version bump #46
• Bump ed25519-dalek to 2.1.1, ed25519-dalek-bip32 to 0.3.0 #26
• sdk!: Remove re-exports #190
• Create solana-sdk-wasm-js crate #138
• Remove solana-rent-debits crate #199
• wasm-js!: Move all implementations into sdk-wasm-js #244
• sdk!: Remove program feature #249