[dependabot]

Bumps @solana/web3.js from 1.99.0 to 3.1.0.

Release notes

Sourced from @​solana/web3.js's releases.

v3.1.0

Full changelog: v3.0.2...v3.1.0

Published Packages

• @solana/web3.js@3.1.0
• @solana/wallet-adapter@3.1.0

Installation

pnpm add @solana/web3.js@3.1.0 @solana/wallet-adapter@3.1.0

What's Changed

• fix(web3.js): handle nullish memcmp in data-size filters by @​snuff12 in solana-foundation/solana-web3.js#3977
• fix(web3.js): reject unsupported memcmp encodings in getProgramAccounts filters by @​amilz in solana-foundation/solana-web3.js#3978
• docs(web3.js): note planned durable nonce deprecation on nonce APIs by @​amilz in solana-foundation/solana-web3.js#3979
• chore(wallet-adapter): bump @​solana/surfpool to ^1.6.1 by @​amilz in solana-foundation/solana-web3.js#3981
• chore: bump next from 16.3.6 to 16.3.8 in the npm_and_yarn group across 1 directory by @​dependabot[bot] in solana-foundation/solana-web3.js#3982
• feat(examples): add web3.js v3 basics node scripts by @​amilz in solana-foundation/solana-web3.js#3980
• chore(web3.js): bump to @​solana/kit 8.5 ^8.5.0 and support verifySignature change by @​amilz in solana-foundation/solana-web3.js#3984
• ci: skip PR hygiene checks on closed pull requests by @​amilz in solana-foundation/solana-web3.js#3988
• feat(web3.js): make Connection a Kit client (rpc, rpcSubscriptions, getMinimumBalance) by @​amilz in solana-foundation/solana-web3.js#3983
• fix(web3.js): skip ws error log when the socket closes with no active subscriptions by @​amilz in solana-foundation/solana-web3.js#3987
• feat(examples): add Anchor 2 example and use Connection as a Kit client by @​amilz in solana-foundation/solana-web3.js#3985
• chore: bump version to v3.1.0 by @​amilz in solana-foundation/solana-web3.js#3989

Connection now implements a Kit client

That means you can pass it straight to Kit-native libraries like Anchor 2 and the Codama-generated @solana-program/* clients, without building a second RPC.

Anchor 2: give a Connection and Keypair to AnchorProvider:

import {AnchorProvider, Program} from '@anchor-lang/core';
import {Connection, Keypair, sendAndConfirmTransaction, Transaction} from '@solana/web3.js';
const connection = new Connection(rpcUrl, 'confirmed');
const provider = new AnchorProvider(connection, trader);
const program = new Program<Whirlpool>(idl, provider);
const {data: pool} = await program.account.whirlpool.fetch(SOL_USDC_POOL);
const swapIx = await program.methods
.swap(USDC_IN, 0n, MAX_SQRT_PRICE, true, false)
.accounts({whirlpool: SOL_USDC_POOL, tokenVaultA: pool.tokenVaultA, /* ... */})
.instruction();
</tr></table>

... (truncated)

Changelog

Sourced from @​solana/web3.js's changelog.

Release Notes for 3.0.0

These notes summarize the user-facing changes that landed since 1.98.4.

Highlights

• Connection now runs on typed Solana Kit HTTP and websocket transports end-to-end, replacing the older JSON-RPC plumbing while preserving the class-based web3.js API shape.
• Websocket subscription setup failures no longer spin through indefinite retry loops; failed opens now become terminal until listener demand changes or the transport reconnects.
• The library has moved much further toward Uint8Array-first and async-first behavior, reducing Buffer-specific behavior and aligning signing and verification with WebCrypto/Kit.
• Program and account encode/decode paths have been modernized around codecs and vendored generated program clients.
• Packaging, build, and install flows were refreshed, including esbuild-based bundling, generated lib/ output for git installs, and updated validator/dependency tooling.

Migration Reality Check

• The public API is still class-based, but non-trivial TypeScript consumers should still expect broad mechanical migration work. In practice, the largest sources of churn are bigint numerics, Uint8Array account data, async key/serialization helpers, and readonly RPC results, and more specific SDK types for values such as addresses, blockhashes, slots, lamports, and timestamps.
• For full-app consumers already using most of the class surface, the immediate payoff is usually API modernization and future compatibility rather than a dramatic bundle-size reduction.

Breaking Changes

• PublicKey.unique() was removed.
• Legacy BN-era PublicKey constructor inputs such as PublicKeyData or { _bn: BN } are no longer accepted.
• Keypair.generate(), Keypair.fromSecretKey(...), and Keypair.fromSeed(...) are now async. Tests and stories that previously used sync key generation often need to become async or switch to app-local dummy public-key helpers.
• Keypair.address is now a Kit branded base58 address string for signer API compatibility. Use Keypair.publicKey when you need the web3.js Address class methods such as .toBytes(), .equals(...), or .toBase58().
• Transaction.verifySignatures() is now async and returns a promise.
• Transaction.serialize() is now async and must be awaited.
• Remaining sync signing helpers that existed earlier in the range were removed in favor of the async signing surface.
• The legacy Web3Signer shape ({publicKey, secretKey}) and the MessageSigner type alias were removed. The exported Signer type is now MessagePartialSigner & TransactionPartialSigner from @solana/kit, and transaction signing APIs accept any Kit TransactionPartialSigner, which Signer satisfies. Pass Keypair instances or other Kit transaction signers; migrate any remaining {publicKey, secretKey} literals via await Keypair.fromSecretKey(legacySigner.secretKey).
• The implicit Connection default commitment changed from finalized to confirmed.
• Many migrated Connection methods now return Kit-native bigint values instead of legacy number values.
• Slot-like and minContextSlot inputs were widened to number | bigint and now reject unsafe numeric inputs.
• AccountInfo-like responses now use Uint8Array payloads, readonly wrappers, and space: bigint instead of the old mutable Buffer-centric shapes.
• The deprecated FeeCalculator surface was removed, including FeeCalculator, getRecentBlockhash, getRecentBlockhashAndContext, and getFeeCalculatorForBlockhash.
• The legacy Account class was removed.
• Deprecated BufferLayout-based internals and compatibility surfaces were removed in favor of codec-backed implementations.
• Connection.getMinimumBalanceForRentExemption(...) now propagates RPC and transport failures instead of logging a warning and resolving 0n. Callers that relied on the zero fallback must handle the rejection, because a failed rent query should not be mistaken for a rent-free account.
• Transaction.add(...) now narrows its inputs with instanceof Transaction and instanceof TransactionInstruction instead of the previous 'instructions' in item / 'data' in item duck-typing checks. Loose "Transaction-like" or "TransactionInstruction-like" objects that aren't real instances will no longer be accepted at runtime. Well-typed TypeScript callers are unaffected.

API And Runtime Changes

Connection

• HTTP requests now go through typed Kit RPC calls instead of the legacy request pipeline.
• Websocket subscriptions now run on a Kit-backed subscription runtime with stronger request/response shaping and broader payload coverage.
• Websocket subscriptions now match Kit's default 100-subscription channel limit for improved stability.
• Added Connection.awaitSubscriptionReady(...) so callers can await websocket subscription establishment, explicit setup failure, or listener invalidation.
• Shared websocket subscriptions now invalidate readiness per client listener, so removing one deduplicated listener before acknowledgement no longer resolves readiness for the wrong listener.
• Signature-confirmation fallback now treats failed or inactive subscription setup as terminal and continues via getSignatureStatuses() when needed.
• ConnectionConfig.fetch and fetchMiddleware remain available as compatibility hooks on top of the typed HTTP path.
• Additional RPC coverage and stricter typing landed across account, block, transaction, token, simulation, and node metadata methods.
• Connection.simulateTransaction(...) now surfaces the RPC's fee, preBalances, postBalances, preTokenBalances, postTokenBalances, and loadedAddresses on the simulation result when the RPC returns them, matching Kit's simulation response.

... (truncated)

Commits

• 63b4f87 chore: bump version to v3.1.0 (#3989)
• 57fd673 fix(web3.js): skip ws error log when the socket closes with no active subscri...
• bd879f1 feat(web3.js): make Connection a Kit client (rpc, rpcSubscriptions, getMinimu...
• 6c7cd06 chore(web3.js): bump to @​solana/kit 8.5 ^8.5.0 and support verifySignature ch...
• 8837d96 docs(web3.js): note planned durable nonce deprecation on nonce APIs (#3979)
• d4e4bd0 fix(web3.js): reject unsupported memcmp encodings in getProgramAccounts filte...
• f456382 fix(web3.js): handle nullish memcmp in data-size filters (#3977)
• 7c8b33e chore: bump version to v3.0.2 (#3974)
• f120283 chore: release web3.js and wallet-adapter 3.0.1 (#3969)
• 648516f chore: update version (#3965)
• Additional commits viewable in compare view

[dependabot]

OK, I won't notify you again about this release, but will get in touch when a new version is available. If you'd rather skip all updates until the next major or minor version, let me know by commenting @dependabot ignore this major version or @dependabot ignore this minor version. You can also ignore all major, minor, or patch releases for a dependency by adding an ignore condition with the desired update_types to your config file.

If you change your mind, just re-open this PR and I'll resolve any conflicts on it.