StreamFlow

This repository contains the Solana program source code.

It is laid out as a standard crate, and the program code can be found in src/lib.rs.

Other StreamFlow Finance resources:

• Platform Demo
• Slides
• Website
• App (GitHub repository)

Deployment

• On Solana Mainnet, the program is not yet deployed.
• On Solana Devnet, the program ID is: 2DvvSEde36Ch3B52g9hKWDYbfmJimLpJwVBV9Cknypi4

To verify the deployed program corresponds to this source code, have a look at the verification document and the verify_deployment.sh shell script.

Usage

See cli/strfi.js to get an understanding.

initialize_stream

This instruction is used to initialize the stream, and save the data and lock the funds for streaming on a given account.

Note that the implementation sends DEFAULT_TARGET_LAMPORTS_PER_SIGNATURE immetiately to the recipient, so they don't have to have previous funds in order to issue a withdraw instruction in the future.

• Accounts:

  • Alice (Sender) (signer, writable)
  • Bob (Recipient) (writable)
  • PDA (Account where funds will be locked) (signer, writable)
  • Solana System Program

• Instruction data:

  • instruction (1 byte, u8) (Should be 0 for initialize_stream
  • start_time (32 bytes, u32) (Unix timestamp when funds start to be unlocked)
  • end_time (32 bytes, u32) (Unix timestamp when all funds should be unlocked)
  • amount (64 bytes, u64) (Amount of lamports to lock and stream)

• Data saved in the PDA account:

  • start_time (64 bytes, u64)
  • end_time (64 bytes, u64)
  • amount (64 bytes, u64)
  • withdrawn (64 bytes, u64) (Amount that has been withdrawn so far)
  • sender (32 bytes, u8 array) (Alice/Sender's public key)
  • recipient (32 bytes, u8 array) (Bob/Recipient's public key)

withdraw_unlocked

This instruction is used by the stream recipient, and will transfer a given amount of lamports, if unlocked, from the stream account to the caller.

If the requested amount if lamports is 0 (zero), then all unlocked funds will be withdrawn.

• Accounts:

  • Bob (Recipient) (signer, writable)
  • PDA (Account where the funds are locked) (writable)
  • Rent collector (Hardcoded address where the remaining rent is sent after a successful stream) (writable)

• Instruction data:

  • instruction (1 byte, u8) (Should be 1 for withdraw_unlocked)
  • amount (64 bytes, u64) (Amount of lamports to potentially withdraw)

cancel_stream

This instruction is used by the stream initializer, and will cancel the given stream, returning all locked funds to the caller and purging the account.

• Accounts:

  • Alice (sender) (signer, writable)
  • Bob (recipient) (writable)
  • PDA (account where funds are locked) (writable)

• Instruction data:

  • instruction (1 byte, u8) (Should be 2 for cancel_stream)

License

StreamFlow Rust code is licensed AGPL-3.