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)

• 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.

See cli/strfi.js and examples/strfi.rs to get an understanding.

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 (64 bytes, u64) (Unix timestamp when funds start to be unlocked)
  • end_time (64 bytes, u64) (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  • withdrawn (64 bytes, u64) (Amount that has been withdrawn so far)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)

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If the requested amount if lamports is 0 (zero), then all unlocked funds will be withdrawn.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

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)

StreamFlow Rust code is licensed AGPL-3.