BufferUsed (uint256 amountUsed, uint256 bufferRemaining)
[topic 0]:0xc89b99870f6dd9f35bdd8bada9a4e2a6ba2862d2b5be9eaf54f6b8a6987368fe
0x000000000000000000000000000000000000000000000324f0ed313f3544898d000000000000000000000000000000000000000000005b876aecd5e0fad5ea19