AgentSkillsCN

estimate-transaction-fee

当用户请求“估算交易费用”、“计算 BSV 费用”、“每字节费用”、“交易成本”，或需要根据交易规模与当前费率估算费用时，应使用此技能。

SKILL.md
--- frontmatter
name: estimate-transaction-fee
description: This skill should be used when the user asks to "estimate transaction fee", "calculate BSV fee", "fee per byte", "transaction cost", or needs to estimate fees based on transaction size and current rates.
allowed-tools: "Bash(bun:*)"

Estimate Transaction Fee

Estimate fees for BSV transactions based on size and fee rates.

When to Use

  • •Estimate fee before sending a transaction
  • •Calculate size of a transaction
  • •Understand fee structure

Usage

bash
# Estimate by size
bun run skills/estimate-transaction-fee/scripts/estimate.ts --size 226

# Estimate from raw tx hex
bun run skills/estimate-transaction-fee/scripts/estimate.ts --tx <hex>

# Estimate by inputs/outputs
bun run skills/estimate-transaction-fee/scripts/estimate.ts --inputs 2 --outputs 3

# Custom fee rate
bun run skills/estimate-transaction-fee/scripts/estimate.ts --size 226 --rate 2

# JSON output
bun run skills/estimate-transaction-fee/scripts/estimate.ts --size 226 --json

# Show help
bun run skills/estimate-transaction-fee/scripts/estimate.ts --help

Size Estimation

P2PKH transaction size formula:

  • •Base overhead: 10 bytes
  • •Per input: ~148 bytes
  • •Per output: ~34 bytes

Example: 1 input + 2 outputs = 10 + 148 + 68 = 226 bytes

Output Examples

Default output:

code
Fee Estimation
==============
Size: 226 bytes
Rate: 1 sat/byte
Fee: 226 satoshis (0.00000226 BSV)

With --inputs/--outputs (shows breakdown):

code
Fee Estimation
==============
Size: 226 bytes
Rate: 1 sat/byte
Fee: 226 satoshis (0.00000226 BSV)
Breakdown:
  - Inputs (1): ~148 bytes
  - Outputs (2): ~68 bytes
  - Overhead: ~10 bytes

JSON output (--json):

json
{
  "size": 226,
  "rate": 1,
  "fee": 226,
  "feeBsv": 0.00000226
}

Status

Complete