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@stellar-agent/freighter-bridge

v0.6.0

Published

Local approval request storage and Freighter-compatible signing bridge for Stellar Agent Bridge.

Vulnerabilities

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Links

Git

Maintainers

someone-in-texassomeone-in-texas

Keywords

Readme

@stellar-agent/freighter-bridge

Local approval request storage and Freighter-compatible signing bridge for Stellar Agent.

This package stores auditable approval requests and serves a localhost HTTP API/UI for human approval. It never stores raw secret keys.

Install

npm install @stellar-agent/freighter-bridge

CLI Entry Points

stellar-agent approval create-payment --to G... --amount 6 --json
stellar-agent approval create-transaction --xdr AAAA... --summary "Sign contract transaction" --network testnet --json
stellar-agent tx request-payment-signature --from treasury --to G... --amount 1 --json
stellar-agent approval decide appr_... --approve --json
stellar-agent approval serve
stellar-agent approval open --port 8787 --token <session-token> --json
stellar-agent pay send --to G... --amount 6 --approval-id appr_... --json
stellar-agent tx submit-approval appr_... --json

Implemented

  • Payment approval request creation.
  • Transaction XDR approval request creation.
  • Approve, deny, and signed decision recording.
  • Signed-XDR substitution checks for transaction approval requests.
  • Request hash matching for payment approvals.
  • Localhost HTTP endpoints under /api/requests.
  • A small static approval UI at / with optional Freighter signTransaction support.
  • Loopback-only approval bridge hosting by default, with explicit opt-in required for remote binds.

Safety

The UI uses Freighter's browser API when available. It reads the bridge token from the printed uiUrl or copyUrl fragment, not from unauthenticated HTML, and posts signedTransactionXdr and signerPublicKey back to the bridge without exposing secrets to the CLI. The bridge accepts signed transaction XDR only when it has at least one signature and its transaction body matches the original approval request. Signed transaction approvals can then be submitted to Testnet with tx submit-approval. Mainnet submission is available only with Mainnet enabled, an active Mainnet profile, and --allow-real-funds --i-understand-real-funds; the CLI still never imports or stores Mainnet secret keys.

The signed-envelope comparison path uses Stellar SDK 17 property-style XDR unions. Approvals expire, are atomically bound to one execution intent, and are consumed once; transaction approvals also verify that the exact approved body was signed by the declared signer. See the SDK 17 migration guide.

Links

  • GitHub: https://github.com/someone-in-texas/Stellar-Agent
  • Mainnet safety: https://github.com/someone-in-texas/Stellar-Agent/blob/main/docs/mainnet-safety.md
  • npm CLI package: https://www.npmjs.com/package/@stellar-agent/cli
  • Typed SDK examples: https://github.com/someone-in-texas/Stellar-Agent/tree/main/examples/sdk-typescript