(Only Owner) Sweep token balances from the contract to to.
fn claim(
env: soroban_sdk::Env,
to: soroban_sdk::Address,
assets: soroban_sdk::Vec,
) -> soroban_sdk::Map (Only Owner) Deposit USDC from owner into the contract's supply
position in source_pool. This is how the owner capitalizes or tops up
the contract without needing programmatic access to C-account positions
through a wallet UI.
fn deposit(env: soroban_sdk::Env, amount: i128)(Only Owner) Upgrade the contract to new WASM. The contract ID and all stored state (owner, position, submitters) are preserved.
fn upgrade(env: soroban_sdk::Env, new_wasm_hash: soroban_sdk::BytesN<32>)(Only Owner) Withdraw USDC from the contract's source_pool position to
any address (typically the owner's own wallet). Transfers the amount the
pool actually released — Blend caps a withdraw at the available position
and rounds in bToken terms, so transferring the realized delta (rather
than the requested amount) avoids the off-by-rounding revert.
fn withdraw(env: soroban_sdk::Env, to: soroban_sdk::Address, amount: i128)fn get_owner(env: soroban_sdk::Env) -> soroban_sdk::Address(Only Owner) Rotate ownership.
fn set_owner(env: soroban_sdk::Env, new_owner: soroban_sdk::Address)(Only Owner) Drain the entire USDC position in source_pool to to in
one transaction. Passes i128::MAX to the pool (Blend caps it at the live
position) and sweeps the full resulting USDC balance, so no caller-side
balance query or rounding buffer is needed.
fn withdraw_all(env: soroban_sdk::Env, to: soroban_sdk::Address) -> i128Initialize the contract.
owner - Controls claim, withdraw, set_owner, set_source_pool,
set_submitters, upgrade.backstop - Blend backstop contract address.usdc - USDC token contract address.source_pool - The Blend pool where this contract holds a USDC supply
position. Withdrawals happen from here to fund fills.submitters - Allowlist of accounts permitted to call fill_interest.
The owner can update this later via set_submitters.fn __constructor(
env: soroban_sdk::Env,
owner: soroban_sdk::Address,
backstop: soroban_sdk::Address,
usdc: soroban_sdk::Address,
source_pool: soroban_sdk::Address,
submitters: soroban_sdk::Vec,
) Fill an interest auction. The submitter must be on the allowlist and
must authorize the call (it is the fee-bumped source account in the
multi-submitter race). USDC is withdrawn from the contract's supply
position in source_pool, converted to backstop LP tokens via Comet,
and used to fill the auction in pool. Any unused USDC is re-supplied
back to source_pool so it keeps earning interest.
submitter - The racing account invoking this fill (must be allowlisted).pool - Pool whose backstop has the interest auction.fill_percent - Percentage to fill (1-100).max_usdc_in - Upper bound of USDC to spend on this fill.fn fill_interest(
env: soroban_sdk::Env,
submitter: soroban_sdk::Address,
pool: soroban_sdk::Address,
fill_percent: u32,
max_usdc_in: i128,
)fn get_submitters(env: soroban_sdk::Env) -> soroban_sdk::Vec(Only Owner) Replace the fill_interest allowlist. Pass the full set of
authorized submitter accounts (this overwrites, it does not append).
fn set_submitters(
env: soroban_sdk::Env,
submitters: soroban_sdk::Vec,
) fn get_source_pool(env: soroban_sdk::Env) -> soroban_sdk::Address(Only Owner) Change the pool this contract withdraws USDC from.
fn set_source_pool(env: soroban_sdk::Env, new_pool: soroban_sdk::Address)