Senior Rust Engineer

Introducing token account filters for gTFA. Last October Helius Blockchain Technologies, Inc. released getTransactionsForAddress, a new Solana RPC call for querying historical data that combines getSignaturesForAddress and getTransaction into one method. Today, Helius Blockchain Technologies, Inc. is excited to announce getTransactionsForAddress (gTFA) can now query a wallet's token transfer history with a single RPC call. The new tokenAccounts feature allows users to include transactions for the wallet's associated token accounts - previously omitted from gTFA and its predecessor, getSignaturesForAddress. Before, developers were forced to query getTokenAccountsByOwner and then getSignaturesForAddress for every token account. This was slow and expensive, often requiring 100s of extra RPC calls. Now, it only takes a single call to getTransactionsForAddress with tokenAccounts. On Solana, your wallet doesn't actually hold tokens directly. Instead, your wallet owns Associated Token Accounts (ATAs), and those token accounts hold your tokens. For example, when someone sends you USDC, it goes to your USDC token account instead of your main wallet address. This creates a major headache when querying wallet transaction history: When you call getSignaturesForAddress on a wallet, you only get transactions that directly reference that wallet address. Token transfers that interact with your token accounts - but don't mention your wallet - simply don't show up. Before today, developers had to implement a tedious workaround: * Call getTokenAccountsByOwner to get token accounts for a wallet * Call getSignaturesForAddress for the wallet itself * Call getSignaturesForAddress for every single token account * Merge all results together * Deduplicate (many transactions touch multiple accounts) * Sort chronologically A wallet with 50 token accounts requires 51+ RPC calls just to build a complete history. Professional traders, heavy DeFi users, or recreational memecoin traders can have hundreds of token accounts. Want the 20 most recent transactions? You can't just fetch 20 from each source and merge - you need to fetch everything, dedupe, sort, and only then take the first 20 transactions. There's no way to efficiently paginate without over-fetching. Each RPC call has overhead. Multiplying that overhead by 100+ calls per user request gets expensive fast, especially at scale. With the new tokenAccounts filter, you can get a complete wallet history in a single RPC request: The tokenAccounts filter provides three options: none, balanceChanged, and all. When the tokenAccounts filter is set to none, transactions must reference the wallet address. When balanceChanged is applied, transactions reference the wallet address, or modify the balance of a tokenAccount owned by the wallet. Setting tokenAccounts to all requires that transactions reference the address of the wallet or a token account owned by the wallet. * Wallets showing complete transaction history * Portfolio trackers that need every token movement * Tax software calculating gains/losses across all tokens * Analytics dashboards displaying user activity Simply add tokenAccounts: balanceChanged (or all) to your filters object and you're set!

Solana proposes double disinflation amid huge ETF inflows. Solana ETFs (SOL) have attracted record net inflows in November, making them the single-largest draw in the crypto market. This institutional success, largely fueled by the network's attractive staking yield, is now colliding with a new governance proposal to execute a double disinflation. Managing a recent 30% price correction, Solana now faces a critical choice: embrace long-term scarcity and reshape its economic identity, or maintain the high yield that is currently driving its institutional gold rush. Solana supply shock: double disinflation proposal. Helius Labs recently introduced the SIMD-0411 proposal, marking one of the most substantial monetary policies proposed since Solana's launch. Developers plan to double the network's annual disinflation rate, increasing it from 15% to 30%. The accelerated timeline brings the target date for the terminal 1.5% inflation rate forward by three years. This change cuts total projected emissions by over 22 million SOL (approximately $3 billion) over the next six years. Proponents maintain that the network is mature, citing massive increases in both network revenue and DeFi throughput. They argue this growth justifies lowering the issuance schedule, which in turn reduces structural sell pressure and satisfies institutional demands for disciplined tokenomics. The drive to create scarcity is taking place during a period of intense market difficulty affecting Solana's price. Forward Industries, the largest corporate owner of SOL, is currently facing an estimated loss of $646.6 million. Upexi, the fifth-largest corporate SOL holder, has accrued approximately $31 million in unrealized losses, reflecting a 10% drop from its original purchase prices. In contrast, DeFi Development Corp. (DFDV), the proposal's first major supporter, maintains a $62 million profit. Investors pivot to yield: $419M ETF inflows. In the meantime, market flow data for November strongly validates Solana's appeal as a "productive yield asset." While major assets saw massive redemptions, Solana ETFs attracted $419.38 million in fresh capital. To be more specific, Bitcoin ETFs witnessed $3.57 billion in net redemptions, and Ether ETFs lost $1.56 billion during the same period. In other words, investors increasingly choose the steady income of Solana's 5 - 7% native staking yield over the purely speculative nature of assets like Bitcoin, whose exchange-traded products offer no yield. Everstake co-founder Bohdan Opryshko explains that retail and institutional participants now treat SOL as an income-generating tool rather than simply a speculative trade. Scarcity or yield? Data from Coinbase confirms that a compelling 67% of all circulating SOL is in staking, a ratio that Sebastien Gilquin, Head of BD and Partnerships at Trezor, cites as one of the strongest staking profiles among proof-of-stake blockchains. Total staked SOL climbed this year to 407 million, and retail delegators increased their holdings by over 238,000 SOL even during the 30% downturn. The data sets create a critical economic conflict. Solana's ETFs success hinges on the high yield, which depends on the current inflation rate. Yet, SIMD-0411 seeks to cut the inflation rate in half to achieve scarcity. If the community approves the double disinflation plan, the resulting reduction in emissions will cut the staking yield, potentially halving the rate that currently protects SOL from the market outflows hurting its competitors.