Payload Schema

Every Molpha round returns a signed artifact that maps onto the same logical schema across Solana, EVM, Starknet, SDK, and MCP surfaces.

Logical schema

`DataUpdate`

Field	Type	Meaning
`feedId`	`bytes32`	Feed identity derived from owner, API config hash, and quorum
`registryVersion`	`u32`	Immutable node-set snapshot used for verification
`signaturesRequired`	`u32`	Minimum signer threshold for this round
`value`	`bytes32` / `u256`	Canonical result, encoded as a 32-byte big-endian word
`canonicalTimestamp`	`u64`	Unix seconds for the round; signed and used for freshness checks

`SchnorrSignature`

Field	Type	Meaning
`signature` / `s`	`bytes32`	Aggregate Schnorr scalar
`commitment` / `commitmentAddr`	`address` / felt-compatible address	Ethereum-style address of the nonce commitment
`signersBitmap`	`u256` / `bytes32`	Bitmap of participating 1-based registry indices

SDK response shape

interface DataUpdateResult {
  feedId: string;
  value: string;
  valuePacked: string;
  timestamp: number;
  registryVersion: number;
  signaturesRequired: number;
  signersBitmap: string;
  s: string;
  commitmentAddr: string;
  fresh: boolean;
}

Signed message

message = keccak256(abi.encodePacked(
  MESSAGE_PREFIX,
  feedId,
  registryVersion,
  signaturesRequired,
  signersBitmap,
  value,
  canonicalTimestamp
))

signersBitmap is inside the message, so the caller cannot choose a signer set after signature aggregation. chainId is not inside the message, so the same payload can verify on all supported chains.

Consumer rules

Treat value as bytes until your application decodes it.
Enforce feedId equality against the feed you intended.
Enforce freshness against canonicalTimestamp.
Add replay protection when a valid old payload could be submitted twice.
Require the verifier result before executing application logic.

Chain-specific references

Solana

Program verification and feed account details.

EVM

Solidity structs and verifier call pattern.

Starknet

Cairo structs and syscall-based secp256k1 verification.

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Payload Schema

Logical schema

`DataUpdate`

`SchnorrSignature`

SDK response shape

Signed message

Consumer rules

Chain-specific references

Solana

EVM

Starknet

​Logical schema

​DataUpdate

​SchnorrSignature

​SDK response shape

​Signed message

​Consumer rules

​Chain-specific references

Solana

EVM

Starknet

Logical schema

`DataUpdate`

`SchnorrSignature`

SDK response shape

Signed message

Consumer rules

Chain-specific references