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@causeway-sh/core

v0.1.0-alpha.4

Published

Core Causeway TypeScript SDK — PDAs, ix builders, account decoders, coordinator gRPC-Web client

Downloads

916

Vulnerabilities

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  • 0Low

Links

Git

Maintainers

levan.devlevan.dev

Keywords

Readme

@causeway-sh/core

npm License status Causeway

Core TypeScript SDK for Causeway. PDA derivations, instruction builders, account decoders, and a gRPC-Web coordinator client. Required by every other @causeway-sh/* package.

Install

pnpm add @causeway-sh/core@alpha
# or: npm i @causeway-sh/core@alpha
# or: yarn add @causeway-sh/core@alpha

Quickstart

import {
  AssetId, SighashKind,
  findVaultPda,
  GrpcWebCoordinatorClient,
  buildCompleteSigningWithPrecompile,
} from "@causeway-sh/core";
import { PublicKey } from "@solana/web3.js";

const programId = new PublicKey("<your-causeway-program-id>");
const [vaultPda] = findVaultPda(programId, AssetId.Eth, 1);

const coord = new GrpcWebCoordinatorClient({
  baseUrl: "https://coordinator.causeway.sh",
});

const round = await coord.runEcdsaSigningRound({
  requestId: crypto.getRandomValues(new Uint8Array(32)),
  asset: AssetId.Eth,
  payloadHash: yourEip1559Sighash, // Uint8Array(32)
  sighashKind: SighashKind.EthEip1559,
});

// Pair the precompile-verify ix with complete_signing on Solana.
const ixes = buildCompleteSigningWithPrecompile({ /* ... */ });

What's in the box

  • Enums — AssetId, SighashKind, SignatureFormat, RequestStatus, VaultStatus, DerivationMode, PauseReason. Discriminant bytes match the on-chain Causeway program exactly.
  • PDA derivations — findProtocolConfigPda, findVaultPda, findSigningRequestPda, findTenantAuthorityPda. Same seeds as the on-chain programs/causeway, verified against sdk-rs golden vectors.
  • Account decoders — decodeSigningRequest, decodeVault, decodeProtocolConfig. Hand-rolled Borsh, no @coral-xyz/anchor runtime dep.
  • Causeway program ix builders — buildInitializeProtocolConfigIx, buildInitializeVaultIx, buildCompleteSigningIx, buildExpireRequestIx. Anchor 8-byte discriminators exported from discriminators.ts.
  • Solana precompile builders — buildSecp256k1VerifyIx (ECDSA path), buildEd25519VerifyIx (Schnorr / RedDSA path). Byte-for-byte identical to the Rust CLI.
  • buildCompleteSigningWithPrecompile — pairs the precompile-verify ix with complete_signing and wires the txIndex correctly so you can't accidentally drop the precompile.
  • Coordinator gRPC-Web client — GrpcWebCoordinatorClient (prod), MockCoordinatorClient (tests). Connect-over-fetch — no extra browser shims.
  • Typed errors — SDKError with discriminated kind.

Status

Alpha. Real mainnet broadcasts (Bitcoin, Base, Zcash transparent + Sapling shielded) have run through this SDK end-to-end. The on-chain program is unverified bytecode and the protocol is not audited. Do not move funds you can't afford to lose.

License

Apache-2.0

Links