Dynamic Fee Sharing Program Instructions

The dynamic_fee_sharing program exposes the instructions below. Integrators should use the TypeScript SDK for normal transaction construction, or build through CPI.

Instruction Summary

Instruction	Parameters	Main signers	Behavior
`initialize_fee_vault`	`params: InitializeFeeVaultParameters`	`fee_vault`, `payer`	Creates a non-PDA fee vault account and its token vault PDA.
`initialize_fee_vault_pda`	`params: InitializeFeeVaultParameters`	`base`, `payer`	Creates a deterministic PDA fee vault from `base` and `token_mint`, plus its token vault PDA.
`fund_fee`	`max_amount: u64`	`funder`	Transfers up to `max_amount` from the funder’s token account into the vault and updates fee-per-share accounting.
`fund_by_claiming_fee`	`payload: Vec<u8>`	`signer`	Invokes a whitelisted DAMM v2 or DBC instruction with the PDA fee vault as signer, then credits the token vault balance increase.
`claim_fee`	`index: u8`	`user`	Claims the user’s currently available fee amount for the configured user index.

Initialize Non-PDA Fee Vault

Account	Writable	Signer	Notes
`fee_vault`	Yes	Yes	New external account initialized with `8 + FeeVault::INIT_SPACE` bytes.
`fee_vault_authority`	No	No	PDA from `["fee_vault_authority"]`.
`token_vault`	Yes	No	PDA token account from `["token_vault", fee_vault]`.
`token_mint`	No	No	Mint for the fee vault. Must be supported by the token utility.
`owner`	No	No	Stored in the `FeeVault` account.
`payer`	Yes	Yes	Pays rent for the new accounts.
`token_program`	No	No	SPL Token or Token 2022 program for `token_mint`.
`system_program`	No	No	System program.

params.users must contain 2 to 5 entries. Each UserShare.address must be non-default, and each UserShare.share must be greater than zero.

Initialize PDA Fee Vault

Account	Writable	Signer	Notes
`fee_vault`	Yes	No	PDA from `["fee_vault", base, token_mint]`.
`fee_vault_authority`	No	No	PDA from `["fee_vault_authority"]`.
`token_vault`	Yes	No	PDA token account from `["token_vault", fee_vault]`.
`token_mint`	No	No	Mint for the fee vault.
`owner`	No	No	Stored in the `FeeVault` account.
`base`	No	Yes	Seed signer used to derive the fee vault PDA.
`payer`	Yes	Yes	Pays rent for the new accounts.
`token_program`	No	No	SPL Token or Token 2022 program for `token_mint`.
`system_program`	No	No	System program.

Use PDA fee vaults when the fee vault must sign downstream source-program instructions, such as DAMM v2 fee claims or DBC fee withdrawals.

Direct Funding

Account	Writable	Signer	Notes
`fee_vault`	Yes	No	Must have `token_vault` and `token_mint` relations.
`token_vault`	Yes	No	Fee vault token account.
`token_mint`	No	No	Fee vault mint.
`fund_token_vault`	Yes	No	Funder’s token account. The transferred amount is capped by its balance.
`funder`	No	Yes	Token authority for `fund_token_vault`.
`token_program`	No	No	Token program for checked transfer.

fund_fee transfers min(max_amount, fund_token_vault.amount). If the resulting amount is zero, the instruction returns AmountIsZero. For Token 2022 transfer-fee mints, the vault credits the transfer-fee excluded amount to total_funded_fee and fee_per_share.

Source-Program Funding

fund_by_claiming_fee is a wrapper for whitelisted source-program actions. The caller passes the downstream instruction data as payload and the downstream account metas as remaining accounts.

Account	Writable	Signer	Notes
`fee_vault`	Yes	No	Must be a PDA fee vault. Used as a signer for the downstream invocation.
`token_vault`	Yes	No	Fee vault token account. The handler measures this balance before and after the downstream CPI.
`signer`	No	Yes	Must be one of the configured shareholders in the fee vault.
`source_program`	No	No	Whitelisted DAMM v2 or DBC program.
Remaining accounts	Varies	Varies	Passed directly to the downstream instruction. One expected account must equal `token_vault`.

The first 8 bytes of payload must be the downstream Anchor instruction discriminator.

Whitelisted Source Actions

Source program	Downstream instruction	Expected `token_vault` remaining-account index	SDK wrapper
DAMM v2 `cp_amm`	`claim_position_fee`	`4`	`fundByClaimDammV2Fee`
DAMM v2 `cp_amm`	`claim_reward`	`5`	`fundByClaimDammV2Reward`
DBC `dynamic_bonding_curve`	`creator_withdraw_surplus`	`3`	`fundByWithdrawDbcCreatorSurplus`
DBC `dynamic_bonding_curve`	`claim_creator_trading_fee`	`3`	`fundByClaimDbcCreatorTradingFee`
DBC `dynamic_bonding_curve`	`partner_withdraw_surplus`	`3`	`fundByWithdrawDbcPartnerSurplus`
DBC `dynamic_bonding_curve`	`claim_trading_fee`	`4`	`fundByClaimDbcPartnerTradingFee`
DBC `dynamic_bonding_curve`	`withdraw_migration_fee`	`3`	`fundByWithdrawDbcMigrationFee`

The index is zero-based within the remaining accounts passed to fund_by_claiming_fee.

User Claim

Account	Writable	Signer	Notes
`fee_vault`	Yes	No	Must have `token_vault` and `token_mint` relations.
`fee_vault_authority`	No	No	Must equal `EYqHRdtepv1KKUkPAYMBYpSfiGfNd8sa55ZtswodTfBS`.
`token_vault`	Yes	No	Source token account controlled by fee vault authority.
`token_mint`	No	No	Fee vault mint.
`user_token_vault`	Yes	No	Destination token account.
`user`	No	Yes	Must match `fee_vault.users[index].address`.
`token_program`	No	No	Token program for checked transfer.

If the calculated claim amount is zero, the instruction updates no tokens and emits no claim event.

Validation

Area	Rule
User count	Vault initialization requires at least 2 and at most 5 users.
User share	Each share must be greater than zero.
User address	Each address must be non-default.
Mint support	SPL Token mints are supported. Token 2022 mints are supported only with transfer-fee, metadata-pointer, and token-metadata extensions.
Direct funding	`max_amount` is capped by the funder’s token account balance.
Source funding	Only PDA fee vaults can be used, the signer must be a configured shareholder, and the downstream action must be whitelisted.
Claims	The `index` must exist in the fixed user array and the signer must match that user entry.

Documentation Index

​Instruction Summary

​Initialize Non-PDA Fee Vault

​Initialize PDA Fee Vault

​Direct Funding

​Source-Program Funding

​Whitelisted Source Actions

​User Claim

​Validation