Precompiles

Introduction

Precompiled contracts are specialized smart contracts implemented directly in the execution layer of a blockchain. Unlike user-deployed smart contracts that execute EVM bytecode, precompiled contracts offer optimized native implementations for complex cryptographic and computational operations. This significantly improves efficiency and reduces gas costs. Precompiled contracts exist at fixed addresses within the execution client and each precompile has a predefined gas cost based on its computational complexity, ensuring predictable execution fees. The DATA Foundation introduces two precompiled contracts:

p256Verify precompile to support signature verifications in the secp256r1 elliptic curve.
ipgraph precompile to enhance on-chain intellectual property management.

In addition, the DATA Foundation’s execution layer supports all standard EVM precompiled contracts, ensuring full compatibility with Ethereum-based tooling and applications.

Precompiled Contracts

Address	Functionality
byte1	`ecrecover`- ECDSA signature recovery
byte2	`sha256` - SHA-256 hash computation
byte3	`ripemd160` - RIPEMD-160 hash computation
byte4	`identity` - Identity function
byte5	`modexp` - Modular exponentiation
byte6	`bn256Add` - BN256 elliptic curve addition
byte7	`bn256ScalarMul` - BN256 elliptic curve scalar multiplication
byte8	`bn256Pairing` - BN256 elliptic curve pairing check
byte9	`blake2f` - Blake2 hash function
byte10	`kzgPointEvaluation` - KZG polynomial commitment evaluation
byte0	`p256Verify` - Secp256r1 signature verification
byte1	`ipgraph` - Intellectual property management

p256Verify Precompile

Refer to RIP-7212 for more information.

IPgraph Precompile

The ipgraph precompile enables efficient querying and modification of IP relationships and royalty structures while minimizing gas costs. This contract is deployed at 0x0000000000000000000000000000000000000101 and access is controlled through this contract 0x1640A22a8A086747cD377b73954545e2Dfcc9Cad. This precompile provides multiple functions based on the function selector: the first 4 bytes of the input.

Function Selector	Description	Gas computation formula	Gas Cost
`addParentIp`	Adds a parent IP record	`intrinsicGas + (ipGraphWriteGas * parentCount)`	Larger than 1100
`hasParentIp`	Checks if an IP is parent of another IP	`ipGraphReadGas * averageParentIpCount`	40
`getParentIps`	Retrieves parent IPs	`ipGraphReadGas * averageParentIpCount`	40
`getParentIpsCount`	Gets the number of parent IPs	`ipGraphReadGas`	10
`getAncestorIps`	Retrieves ancestor IPs	`ipGraphReadGas * averageAncestorIpCount * 2`	600
`getAncestorIpsCount`	Gets the number of ancestor IPs	`ipGraphReadGas * averageParentIpCount * 2`	80
`hasAncestorIp`	Checks if an IP is ancestor of another IP	`ipGraphReadGas * averageAncestorIpCount * 2`	600
`setRoyalty`	Sets royalty details of an IP	`ipGraphWriteGas`	1000
`getRoyalty`	Retrieves royalty details of an IP	`varies by royalty policy`	LAP:900, LRP:620, other:1000
`getRoyaltyStack`	Retrieves royalty stack of an IP	`varies by royalty policy`	LAP:50, LRP: 600, other:1000
`hasParentIpExt`	Checks if an IP is parent of another IP through external call	`ipGraphExternalReadGas * averageParentIpCount`	8400
`getParentIpsExt`	Retrieves parent IPs through external call	`ipGraphExternalReadGas * averageParentIpCount`	8400
`getParentIpsCountExt`	Gets the number of parent IPs through external call	`ipGraphExternalReadGas`	2100
`getAncestorIpsExt`	Retrieve ancestor IPs through external call	`ipGraphExternalReadGas * averageAncestorIpCount * 2`	126000
`getAncestorIpsCountExt`	Gets the number of ancestor IPs through external call	`ipGraphExternalReadGas * averageParentIpCount * 2`	16800
`hasAncestorIpExt`	Checks if an IP is ancestor of another IP through external call	`ipGraphExternalReadGas * averageAncestorIpCount * 2`	126000
`getRoyaltyExt`	Retrieves royalty details of an IP through external call	`varies by royalty policy`	LAP:189000, LRP:130200, other:1000
`getRoyaltyStackExt`	Retrieves royalty stack of an IP through external call	`varies by royalty policy`	LAP:10500, LRP:126000, other:1000

Get Started

The Data Stack

DATA Network

Notices

Introduction

Precompiled Contracts

p256Verify Precompile

IPgraph Precompile

​Introduction

​Precompiled Contracts

​p256Verify Precompile

​IPgraph Precompile

Introduction

Precompiled Contracts

p256Verify Precompile

IPgraph Precompile