Resource Limits & Fees
Resource Limits
note
Resource limitations and fees only apply to smart contract transactions. Read more about the inner workings of fees on Stellar in the Fees section.
| Network Setting | Value |
|---|---|
| Soroban txn per ledger | 100 |
| Max CPU instructions per txn | 100 million |
| Memory limit per txn | 40 MB |
| Individual ledger key size (contract storage key) | 250 bytes |
| Individual ledger entry size (including Wasm entries) | 128 KiB |
| Read/Write ledger entries per txn | 40 read; 25 write |
| Read/Write bytes per txn | 200 KB read; 129 KiB write |
| Transaction size | 129 KiB |
| Persistent entry minimal/initial lifetime | 120 days |
| Temporary entry minimal/initial lifetime | 1 day |
| Max ledger entry expiration bump | 6 months |
| Events+return value size bytes | 8 KB |
| Max write bytes per ledger | 140 KiB |
| Max txs size in bytes per ledger | 130 KiB |
| Eviction scan size | 500 KB |
Resource Fees
| Network Setting | Cost (stroops) |
|---|---|
| 10,000 instructions | 25 (250,000/max tx) |
| Read 1 ledger entry | 6,250 (250,000/max tx) |
| Write 1 ledger entry | 10,000 (250,000/max tx) |
| Read 1KB from ledger | 1,786 (250,000/max tx) |
| 1KB of transaction size (bandwidth) | 1,624 (113,642/max tx) |
| 1KB of transaction size (history) | 16,235 (1,136,418/max tx) |
| 1KB of Events/return value | 10,000 (80,000/max tx) |
| Write 1KB to ledger | ~11,800 (826'000/max tx) |
| 30 days of rent for 1 KB of persistent storage | 0.29 XLM |
| 30 days of rent for 1 KB of temporary storage | 0.145 XLM |
Note that the write fee normally fluctuates a bit (within 100 stroops/KB). However, if the ledger grows too quickly, the write fee will grow in a linear fashion with a steep slope.
The ledger rent cost ('Write 1KB' entries in the table) is based on the write fee, rent period and some coefficient.