Published inHedera Blog·Sep 22How to Set Up Foundry to Test Smart Contracts on HederaFoundry provides tools to developers who are developing smart contracts. One of the 3 main components of Foundry is Forge: Foundry’s testing framework. Tests are written in Solidity and are easily run with the forge test command. This tutorial will dive into configuring Foundry with Hedera to use Forge in…Blockchain7 min readBlockchain7 min read
Published inHedera Blog·Sep 21How to Generate a Random Number on HederaPseudorandom numbers are used in applications like lotteries, gaming, and even random selection in NFT sales/giveaways. In some cases, it is necessary to prove to third parties that a random number was generated without the influence or control of a user/application. With Hedera, you have a transaction and Solidity library…Blockchain9 min readBlockchain9 min read
Published inHedera Blog·Sep 20NFT Royalty Fees: Everything You Need To Know (Edge-cases Included)When you create a new non-fungible token using the Hedera Token Service (HTS), you have the possibility to set one or multiple royalty fees. You can do this by using the CustomRoyaltyFee method, which allows you to set all parameters for your custom NFT royalty fee. In its simplest form…Blockchain7 min readBlockchain7 min read
Published inHedera Blog·Sep 18How to Exempt Hedera Accounts from Custom Token FeesThe implementation of HIP-573 in mainnet release v0.31 (November 10th, 2022) enables token creators whose tokenomics require custom fees and different collection accounts to exempt fee collectors from paying custom fees when exchanging token units. This example guides you through the following steps: Creating a Helper Function and defining three…Blockchain4 min readBlockchain4 min read
Published inHedera Blog·Sep 15How to Pass Zero Token Values to Hedera ContractsIn use cases like DeFi, contracts often need to mint, burn, or transfer 0 units of a token due to integer rounding. The implementation of HIP-564 in release 0.31 of Hedera Services enables smart contract developers to specify a zero value for contract functions performing token operations. The benefit is…10 min read10 min read
Published inHedera Blog·Sep 14How to Auto-Create Hedera Accounts with HBAR and Token TransfersHIP-32 introduced the ability to auto-create accounts when sending HBAR to an alias that does not exist on the network. When HBAR is sent to an alias that does not exist on the network, the account creation fee is deducted from the HBAR sent and the account is auto-created. The…Blockchain8 min readBlockchain8 min read
Published inHedera Blog·Sep 11Create Testnet Accounts with ED25519 and ECDSA Keys from the Hedera Portal — Back to the BasicsThe Hedera Portal is where developers create test accounts that enable building applications in development, risk-free, and cost-free environments (testnet, preview, or local network). The portal is a vital part of the Hedera ecosystem because it is effectively an onramp onto Hedera test networks and a faucet for test HBAR…Blockchain3 min readBlockchain3 min read
Published inHedera Blog·Sep 8How to Approve Fungible Token and NFT Allowances on Hedera — Part 1: Using the SDKAllowances grant another account (spender) the right to transfer HBAR, fungible tokens (FT), and non-fungible tokens (NFTs) from your account (owner). The ability to approve allowances is important because it enables applications like exchanges and wallets to perform transfers on behalf of their customers without requiring a customer to sign…Blockchain11 min readBlockchain11 min read
Published inHedera Blog·Sep 7How to Approve HBAR Allowances on Hedera Using the SDKAllowances grant another account (spender) the right to transfer HBAR, fungible tokens, and non-fungible tokens from your account (owner). The ability to approve allowances is important because it enables applications like exchanges and wallets to perform transfers on behalf of their customers without requiring a customer to sign every single…Blockchain6 min readBlockchain6 min read
Published inHedera Blog·Sep 5Token Information DeprecatedIn relation to HIP-367, the consensus node will no longer return the token information for getAccountInfo, getContractInfo and getAccountBalance. This will take place 6 months after the mirror node REST APIs to access this info are released. The APIs are not available today, but you can track the process of…Blockchain2 min readBlockchain2 min read
