Agent skill

Evm Token Decimals

防止跨EVM链的静默小数不匹配错误。涵盖运行时小数查找、链感知缓存、桥接代币精度漂移以及面向机器人、仪表盘和DeFi工具的安全归一化。

Install Evm Token Decimals

skills CLI

$ npx skills add affaan-m/ECC --skill evm-token-decimals -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI

$ gh skill install affaan-m/ECC evm-token-decimals --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy

$ git clone --depth 1 https://github.com/affaan-m/ECC.git skills-src && mkdir -p .claude/skills && cp -r skills-src/docs/zh-CN/skills/evm-token-decimals .claude/skills/evm-token-decimals && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Paste into Claude Code

Install the "evm-token-decimals" agent skill from https://github.com/affaan-m/ECC/tree/main/docs/zh-CN/skills/evm-token-decimals into .claude/skills/evm-token-decimals/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "evm-token-decimals", then confirm the skill loads.

Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

$skill-installer

$skill-installer install https://github.com/affaan-m/ECC/tree/main/docs/zh-CN/skills/evm-token-decimals

Type this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.

skills CLI

$ npx skills add affaan-m/ECC --skill evm-token-decimals -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install affaan-m/ECC evm-token-decimals --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/affaan-m/ECC.git skills-src && mkdir -p .agents/skills && cp -r skills-src/docs/zh-CN/skills/evm-token-decimals .agents/skills/evm-token-decimals && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "evm-token-decimals" agent skill from https://github.com/affaan-m/ECC/tree/main/docs/zh-CN/skills/evm-token-decimals into .agents/skills/evm-token-decimals/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "evm-token-decimals", then confirm the skill loads.

Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add affaan-m/ECC --skill evm-token-decimals -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install affaan-m/ECC evm-token-decimals --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/affaan-m/ECC.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/docs/zh-CN/skills/evm-token-decimals .cursor/skills/evm-token-decimals && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "evm-token-decimals" agent skill from https://github.com/affaan-m/ECC/tree/main/docs/zh-CN/skills/evm-token-decimals into .cursor/skills/evm-token-decimals/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "evm-token-decimals", then confirm the skill loads.

Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

gemini skills install

$ gemini skills install https://github.com/affaan-m/ECC.git --path docs/zh-CN/skills/evm-token-decimals

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add affaan-m/ECC --skill evm-token-decimals -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install affaan-m/ECC evm-token-decimals --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/affaan-m/ECC.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/docs/zh-CN/skills/evm-token-decimals .gemini/skills/evm-token-decimals && rm -rf skills-src

Use ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.

Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/

Paste into Gemini CLI

Install the "evm-token-decimals" agent skill from https://github.com/affaan-m/ECC/tree/main/docs/zh-CN/skills/evm-token-decimals into .gemini/skills/evm-token-decimals/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "evm-token-decimals", then confirm the skill loads.

Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

GitHub CLI

$ gh skill install affaan-m/ECC evm-token-decimals

Installs for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).

skills CLI

$ npx skills add affaan-m/ECC --skill evm-token-decimals -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/affaan-m/ECC.git skills-src && mkdir -p .github/skills && cp -r skills-src/docs/zh-CN/skills/evm-token-decimals .github/skills/evm-token-decimals && rm -rf skills-src

Use ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.

GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/

Paste into GitHub Copilot

Install the "evm-token-decimals" agent skill from https://github.com/affaan-m/ECC/tree/main/docs/zh-CN/skills/evm-token-decimals into .github/skills/evm-token-decimals/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "evm-token-decimals", then confirm the skill loads.

GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add affaan-m/ECC --skill evm-token-decimals -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install affaan-m/ECC evm-token-decimals --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/affaan-m/ECC.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/docs/zh-CN/skills/evm-token-decimals .opencode/skills/evm-token-decimals && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "evm-token-decimals" agent skill from https://github.com/affaan-m/ECC/tree/main/docs/zh-CN/skills/evm-token-decimals into .opencode/skills/evm-token-decimals/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "evm-token-decimals", then confirm the skill loads.

OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

Facts

Skill name: evm-token-decimals
GitHub stars: 276k
Token cost: ~762 tokens
SKILL.md length: 54 words
Files: 1
Skills in repo: 683
Repo updated: Oct 10, 2026
First seen: Oct 7, 2026
Licence: MIT

At a glance

防止跨EVM链的静默小数不匹配错误。涵盖运行时小数查找、链感知缓存、桥接代币精度漂移以及面向机器人、仪表盘和DeFi工具的安全归一化。

Tasks that involve Smart contracts
SKILL.md covers 适用场景, 工作原理, 示例 and 规则
Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Evm Token Decimals is an agent skill from affaan-m/ECC. 防止跨EVM链的静默小数不匹配错误。涵盖运行时小数查找、链感知缓存、桥接代币精度漂移以及面向机器人、仪表盘和DeFi工具的安全归一化。

Its SKILL.md is about 760 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Backend & APIs, covering Smart contracts. The repository describes itself as: The agent harness performance optimization system. Skills, instincts, memory, security, and research-first development for Claude Code, Codex, Opencode, Cursor and beyond. The licence is MIT.

When your agent uses it

Tasks that involve Smart contracts

Example prompts

“/evm-token-decimals”

Requirements

Python 3

What it can do on your machine

Read from SKILL.md and the folder at commit 4eb71d9. It shows what the files ask for, not the result of running them.

Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md (its code samples are python, solidity, typescript and bash).
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Evm Token Decimals loads about 762 tokens when it runs. Until then it costs about 22 tokens; SKILL.md has 54 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~22
When it runs · the whole SKILL.md, loaded when a task matches: ~762

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from affaan-m/ECC at commit 4eb71d9, republished under its MIT licence (© affaan-m). 54 words, ~762 tokens.

Download SKILL.mdSave it as .claude/skills/evm-token-decimals/SKILL.md (or your agent's skills folder).

name: evm-token-decimals
description: 防止跨EVM链的静默小数不匹配错误。涵盖运行时小数查找、链感知缓存、桥接代币精度漂移以及面向机器人、仪表盘和DeFi工具的安全归一化。
origin: ECC direct-port adaptation
version: 1.0.0

EVM 代币精度

静默的精度不匹配是导致余额或美元价值出现数量级偏差且不抛出错误的最常见原因之一。

适用场景

在 Python、TypeScript 或 Solidity 中读取 ERC-20 余额
根据链上余额计算法币价值
跨多条 EVM 链比较代币数量
处理跨链桥接资产
构建投资组合追踪器、机器人或聚合器

工作原理

切勿假设稳定币在所有链上使用相同的精度。在运行时查询 decimals()，按 (chain_id, token_address) 进行缓存，并使用精度安全的数学运算进行价值计算。

示例

运行时查询精度

python

from decimal import Decimal
from web3 import Web3

ERC20_ABI = [
    {"name": "decimals", "type": "function", "inputs": [],
     "outputs": [{"type": "uint8"}], "stateMutability": "view"},
    {"name": "balanceOf", "type": "function",
     "inputs": [{"name": "account", "type": "address"}],
     "outputs": [{"type": "uint256"}], "stateMutability": "view"},
]

def get_token_balance(w3: Web3, token_address: str, wallet: str) -> Decimal:
    contract = w3.eth.contract(
        address=Web3.to_checksum_address(token_address),
        abi=ERC20_ABI,
    )
    decimals = contract.functions.decimals().call()
    raw = contract.functions.balanceOf(Web3.to_checksum_address(wallet)).call()
    return Decimal(raw) / Decimal(10 ** decimals)

不要硬编码 1_000_000，因为同名代币在其他链上通常有 6 位小数。

按链和代币缓存

python

from functools import lru_cache

@lru_cache(maxsize=512)
def get_decimals(chain_id: int, token_address: str) -> int:
    w3 = get_web3_for_chain(chain_id)
    contract = w3.eth.contract(
        address=Web3.to_checksum_address(token_address),
        abi=ERC20_ABI,
    )
    return contract.functions.decimals().call()

防御性处理异常代币

python

try:
    decimals = contract.functions.decimals().call()
except Exception:
    logging.warning(
        "decimals() reverted on %s (chain %s), defaulting to 18",
        token_address,
        chain_id,
    )
    decimals = 18

记录回退值并保持可见。旧版或非标准代币仍然存在。

在 Solidity 中归一化为 18 位 WAD 精度

solidity

interface IERC20Metadata {
    function decimals() external view returns (uint8);
}

function normalizeToWad(address token, uint256 amount) internal view returns (uint256) {
    uint8 d = IERC20Metadata(token).decimals();
    if (d == 18) return amount;
    if (d < 18) return amount * 10 ** (18 - d);
    return amount / 10 ** (d - 18);
}

使用 ethers 的 TypeScript 示例

typescript

import { Contract, formatUnits } from 'ethers';

const ERC20_ABI = [
  'function decimals() view returns (uint8)',
  'function balanceOf(address) view returns (uint256)',
];

async function getBalance(provider: any, tokenAddress: string, wallet: string): Promise<string> {
  const token = new Contract(tokenAddress, ERC20_ABI, provider);
  const [decimals, raw] = await Promise.all([
    token.decimals(),
    token.balanceOf(wallet),
  ]);
  return formatUnits(raw, decimals);
}

快速链上检查

bash

cast call <token_address> "decimals()(uint8)" --rpc-url <rpc>

规则

始终在运行时查询 decimals()
按链加代币地址进行缓存，而非按代币符号
使用 Decimal、BigInt 或等效的精确数学运算，避免使用浮点数
在跨链桥接或代币包装变更后重新查询精度
在比较或定价前，始终将内部记账归一化为一致精度

Files

Just SKILL.md in docs/zh-CN/skills/evm-token-decimals of affaan-m/ECC.

Open the folder on GitHubat commit 4eb71d9

Compare with similar skills

Evm Token Decimals next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Evm Token Decimals compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Evm Token Decimals this skillaffaan-m/ECC	276k	—	~762	Automated safety check: Pass	MIT	yesterday
Verifyalsk1992/CloddsBot	3k	—	~1.2k	Automated safety check: Pass	MIT	8 days ago
Okx Dex MarketLeoYeAI/openclaw-master-skills	2.2k	—	~5.9k	Automated safety check: Notes	MIT	2 mo ago
UrizenBankrBot/skills	1.2k	—	~1.7k	Automated safety check: Pass	None	yesterday
Solana Token Extensionssolanabr/ai-kit	109	—	~3.5k	Automated safety check: Pass	MIT	today
Deposit QrSuperior-Trade/superior-skills	215	—	~1.1k	Automated safety check: Pass	MIT	1 mo ago

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Questions about Evm Token Decimals

What does Evm Token Decimals do?

防止跨EVM链的静默小数不匹配错误。涵盖运行时小数查找、链感知缓存、桥接代币精度漂移以及面向机器人、仪表盘和DeFi工具的安全归一化。. Evm Token Decimals is an agent skill from affaan-m/ECC.

When should I use Evm Token Decimals?

Evm Token Decimals fits situations like: tasks that involve Smart contracts.

How do I install Evm Token Decimals in Claude Code?

Run `npx skills add affaan-m/ECC --skill evm-token-decimals -a claude-code`. Or copy the skill folder (docs/zh-CN/skills/evm-token-decimals in affaan-m/ECC) into .claude/skills/evm-token-decimals in your project. Claude Code loads it when a task matches its description.

How do I install Evm Token Decimals in Codex?

Run `npx skills add affaan-m/ECC --skill evm-token-decimals -a codex`. Or copy the skill folder (docs/zh-CN/skills/evm-token-decimals in affaan-m/ECC) into .agents/skills/evm-token-decimals in your project. Codex loads it when a task matches its description.

Can I use Evm Token Decimals in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add affaan-m/ECC --skill evm-token-decimals -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/evm-token-decimals, .gemini/skills/evm-token-decimals, .github/skills/evm-token-decimals and .opencode/skills/evm-token-decimals in your project.

What does Evm Token Decimals need to run?

SKILL.md names no scripts, command-line tools or credentials: Evm Token Decimals is instructions for the agent only. Our summary lists: Python 3.

Does Evm Token Decimals access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Evm Token Decimals safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Evm Token Decimals use?

Evm Token Decimals is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Evm Token Decimals use?

About 762 tokens (SKILL.md is roughly 3k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Evm Token Decimals?

Skills that share tags, products or a category with Evm Token Decimals: Verify (alsk1992/CloddsBot, 3k stars), Okx Dex Market (LeoYeAI/openclaw-master-skills, 2.2k stars), Urizen (BankrBot/skills, 1.2k stars) and Solana Token Extensions (solanabr/ai-kit, 109 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Evm Token Decimals?

affaan-m (a GitHub user) maintains it in affaan-m/ECC, which has 276,111 GitHub stars. The repository holds 683 skills in this directory. The repository was last updated on October 10, 2026.

Source: affaan-m/ECC on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.

Install Evm Token Decimals

Facts

At a glance

What it does

When your agent uses it

Example prompts

Requirements

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

EVM 代币精度

适用场景

工作原理

示例

运行时查询精度

按链和代币缓存

防御性处理异常代币

在 Solidity 中归一化为 18 位 WAD 精度

使用 ethers 的 TypeScript 示例

快速链上检查

规则

Files

Compare with similar skills

Similar skills

More from affaan-m/ECC

Related

Questions about Evm Token Decimals