Encrypt Multiple Values
🟢 Beginner | 🔐 Encryption
How to encrypt and send multiple values in a single transaction
Overview
This example teaches efficient batch encryption in FHEVM. Instead of encrypting values separately, chain multiple .add*() calls to create a single encrypted input with shared proof. This reduces gas costs, ensures atomicity, and improves efficiency. Learn how to encrypt mixed types (integers + booleans) together and access them via handles array.
Quick Start
# Create new project from this template
npx labz create encryption-multiple my-project
# Navigate and install
cd my-project
npm install
# Run tests
npx hardhat testCode Explanation
Two Values
Store two encrypted values from a single encrypted input. Client uses .add64(a).add64(b).encrypt() and contract receives both via handles[0] and handles[1].
Lines 55-75
Three Values
Store three encrypted values. Demonstrates scaling to more values with the same pattern. Order matters: first added = handles[0], second = handles[1], etc.
Lines 79-98
Mixed Types
Store mixed encrypted types (euint64 + ebool) in single input. Shows that different types can share the same encrypted input and proof.
Lines 102-136
Coordinates
Store encrypted 3D coordinates. Practical example for games, location privacy, spatial data. Shows how to group related values.
Lines 140-160
Operations On Multiple
Perform operations on multiple stored encrypted values. Examples: summing values, calculating distance squared, validating account with multiple conditions.
Lines 164-195
FHE Operations Used
FHE.fromExternal()FHE.add()FHE.mul()FHE.le()FHE.and()FHE.allowThis()FHE.allow()
FHE Types Used
euint64eboolexternalEuint64externalEbool
Tags
encryption batch multiple fromExternal handles efficiency coklu-sifreleme
Related Examples
Prerequisites
Before this example, you should understand:
Next Steps
After this example, check out:
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