use-usdc

Call the balanceOf method on the USDC ERC-20 contract using viem's readContract, passing the wallet address. Format the result with formatUnits using 6 decimals, since USDC uses 6 decimals on all chains.

Derive the sender and recipient Associated Token Accounts with findAssociatedTokenPda, then build a transfer instruction with getTransferInstruction from @solana-program/token. The recipient ATA must exist before transferring or the transaction fails.

USDC uses 6 decimals on all ecosystems, not 18 like ETH or 9 like SOL. Use parseUnits(amount, 6) on EVM or Math.floor(amount * 1_000_000) on Solana to convert dollar amounts correctly.

No, Solana SPL tokens have no approve pattern like ERC-20. Protocols on Solana use Program Derived Addresses instead, so approvals only apply to EVM chains.

Native USDC is issued directly by Circle on each chain, while bridged variants like USDbC or USDC.e come from third-party bridges. Always use the native Circle-issued contract addresses listed in the official Circle documentation.

Direct transfers only work within a single chain. For moving USDC between chains, use a bridging approach like CCTP or Bridge Kit, which handles burn, attestation, and mint across networks in one flow.