Fix unit issues in balance/transfer actions - #835

Merged
CarsonRoscoe merged 6 commits into
coinbase:mainfrom
phdargen:fixBalanceFormat
Sep 5, 2025
Merged

Fix unit issues in balance/transfer actions#835
CarsonRoscoe merged 6 commits into
coinbase:mainfrom
phdargen:fixBalanceFormat

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@phdargenphdargen commented Sep 4, 2025•
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Description

Fixes issues for native/erc20 balance actions reported by @Story91:

  • get_wallet_details returns ETH amount in wei, LLM converts this to whole units in message to user. Result of conversion depends on LLM knowledge, gpt-4o-mini always got it wrong in my tests
    -> get_wallet_details returns now both amount in wei and whole units

  • when several erc20 token balances are queried in one prompt, default rpc might throw error due to rate limits
    -> made rpc calls more efficient using multicall

  • when prompting eg "fetch usdc balance", LLM often hallucinates address (for example taking usdc address from mainnet, not base)
    -> refined action description + added new action to retrieve commonly used token addresses by symbol for given network

In addition, the following improvements are made:

  • WalletActionProvider native_transfer takes amount in whole units as input and passes this to walletProviders. However, most of them expect atomic units instead -> this is now handled consistently as follows: action takes whole unit format as input, converts to atomic units and then calls internal native_transfer from walletProviders with that
  • remove hardcoded erc20 abi in favor of viem export
  • added guardrails for erc20 transfers to prevent loss of funds by sending to token contracts
  • added optional address arg (default to wallet address) to get_balance erc20 action
  • fixed examples/langchain-cdp-chatbot /chatbot.ts to correctly configure CdpSolanaWalletProvider
  • fixed native sol transfers for CdpSolanaWalletProvider that was throwing Error during transfer: Error: Signature must be 64 bytes long

Tests

Chatbot: typescript/examples/langchain-cdp-chatbot/chatbot.ts
Network: Base mainnet
Prompt: wallet info
-------------------
Wallet Details:
- Provider: cdp_evm_wallet_provider
- Address: 0xf2d4580ADfe8E012f5550322706d62DF11fDBE21
- Network:
* Protocol Family: evm
* Network ID: base-mainnet
* Chain ID: 8453
- Native Balance: 411444858090719 WEI
- Native Balance: 0.000411444858090719 ETH
-------------------
Here are the details of your wallet:
- **Address:** 0xf2d4580ADfe8E012f5550322706d62DF11fDBE21
- **Provider:** cdp_evm_wallet_provider
- **Network:**
- **Protocol Family:** EVM
- **Network ID:** base-mainnet
- **Chain ID:** 8453
- **Native Token Balance:** 0.000411444858090719 ETH
-------------------
Prompt: fetch usdc and cbbtc balance
-------------------
Token address for USDC on base-mainnet: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
-------------------
-------------------
Balance of USD Coin (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) at address 0xf2d4580ADfe8E012f5550322706d62DF11fDBE21 is 0.231121
-------------------
Here are your balances for USDC and CBBTC:
- **USDC Balance:** 0.231121 USDC
- **CBBTC Balance:** 0.00000024 CBBTC
If you need any further assistance, let me know!
-------------------
Prompt: check bankr balance
-------------------
Error: Token symbol "BANKR" not found on base-mainnet. Available token symbols on base-mainnet: USDC, EURC, CBBTC, CBETH, WETH, ZORA, AERO, BNKR, CLANKER
-------------------
-------------------
Token address for BNKR on base-mainnet: 0x22af33fe49fd1fa80c7149773dde5890d3c76f3b
-------------------
-------------------
Balance of BankrCoin (0x22af33fe49fd1fa80c7149773dde5890d3c76f3b) at address 0xf2d4580ADfe8E012f5550322706d62DF11fDBE21 is 0
-------------------
Your balance for BankrCoin (BNKR) is **0**. If you need assistance with anything else, feel free to ask!
-------------------
Prompt: send 0.001 usdc to 0xa8c1a5D3C372C65c04f91f87a43F549619A9483f
Transferred 0.001 of USD Coin (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) to 0xa8c1a5D3C372C65c04f91f87a43F549619A9483f.
Transaction hash for the transfer: 0xfc070337f72b5e154e556d007efc6418ff8c74bcc29c087107e07efdcc16daf2
-------------------
I have successfully transferred **0.001 USDC** to the address **0xa8c1a5D3C372C65c04f91f87a43F549619A9483f**. The transaction hash is: **0xfc070337f72b5e154e556d007efc6418ff8c74bcc29c087107e07efdcc16daf2**.
If you need anything else, just let me know!
-------------------
Prompt: send 0.000001 eth to 0xa8c1a5D3C372C65c04f91f87a43F549619A9483f
-------------------
Transferred 0.000001 ETH to 0xa8c1a5D3C372C65c04f91f87a43F549619A9483f
Transaction hash: 0xeafcac9aa1beb05a2dd72362741939287b6b951ef70a96de38252d5270b08221
-------------------
I have successfully transferred **0.000001 ETH** to the address **0xa8c1a5D3C372C65c04f91f87a43F549619A9483f**.
The transaction hash is: **0xeafcac9aa1beb05a2dd72362741939287b6b951ef70a96de38252d5270b08221**.
Prompt: check usdc balance for 0xa8c1a5D3C372C65c04f91f87a43F549619A9483f
----------
Balance of USD Coin (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) at address 0xa8c1a5D3C372C65c04f91f87a43F549619A9483f is 9.076885
-------------------
The balance of USDC for the address **0xa8c1a5D3C372C65c04f91f87a43F549619A9483f** is **9.076885 USDC**.

Chatbot: typescript/examples/langchain-cdp-chatbot/chatbot.ts
Network: Solana devnet
Prompt: send 0.0001 sol to 91sEBA6DLKakGV4raqW2pE8bmQR1D9dnbdGTjtATur5U -------------------
Transferred 0.0001 SOL to 91sEBA6DLKakGV4raqW2pE8bmQR1D9dnbdGTjtATur5U
Signature: 45MJKkm5CEQbCED8s7Ykz8P8bFySyqXq8AoLWzXW2NXUMMWwW2hcUs22yux1M9q5RHvcUGvcVbgHyy3sHGVC6CyM
-------------------
The transfer of 0.0001 SOL to the address **91sEBA6DLKakGV4raqW2pE8bmQR1D9dnbdGTjtATur5U** has been successfully completed. Transaction Signature: **45MJKkm5CEQbCED8s7Ykz8P8bFySyqXq8AoLWzXW2NXUMMWwW2hcUs22yux1M9q5RHvcUGvcVbgHyy3sHGVC6CyM**

Checklist

A couple of things to include in your PR for completeness:

  • Added documentation to all relevant README.md files
  • Added a changelog entry

@cb-heimdall

cb-heimdall commented Sep 4, 2025•
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@phdargen
phdargen marked this pull request as draft September 4, 2025 03:39
@github-actionsgithub-actionsBot added action provider New action provider wallet provider New wallet provider typescript documentation Improvements or additions to documentation labels Sep 4, 2025
@phdargen
phdargen marked this pull request as ready for review September 4, 2025 04:20
@phdargen
phdargenforce-pushed the fixBalanceFormat branch 2 times, most recently from 532bc67 to c2857a8CompareSeptember 4, 2025 04:40
@github-actionsgithub-actionsBot added the example New example agent label Sep 4, 2025
CarsonRoscoe
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Fantastic work, ty! Lots of little chores we've been meaning to get to all wrapped up in one nice package

@CarsonRoscoe
CarsonRoscoe merged commit 5e133ea into coinbase:mainSep 5, 2025
26 checks passed
@github-actionsgithub-actionsBot mentioned this pull request Sep 3, 2025
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@CarsonRoscoeCarsonRoscoe mentioned this pull request Sep 5, 2025
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@CarsonRoscoeCarsonRoscoeCarsonRoscoe approved these changes
@murrlincolnmurrlincolnmurrlincoln approved these changes

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action providerNew action providerdocumentationImprovements or additions to documentationexampleNew example agenttypescriptwallet providerNew wallet provider

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@phdargen@cb-heimdall@CarsonRoscoe@murrlincoln
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})();
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var __m = "github.com";
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Skip to content
Fix unit issues in balance/transfer actions - #835
Merged
CarsonRoscoe merged 6 commits into
coinbase:mainfrom 
phdargen:fixBalanceFormat
Sep 5, 2025
Merged
Fix unit issues in balance/transfer actions#835
CarsonRoscoe merged 6 commits into
coinbase:mainfrom 
phdargen:fixBalanceFormat
Conversation
@phdargen
@phdargenphdargen
commented
Sep 4, 2025•

edited

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Contributor
Description
Fixes issues for native/erc20 balance actions reported by @Story91:
  • get_wallet_details returns ETH amount in wei, LLM converts this to whole units in message to user. Result of conversion depends on LLM knowledge, gpt-4o-mini always got it wrong in my tests
    
-> get_wallet_details returns now both amount in wei and whole units
  • when several erc20 token balances are queried in one prompt, default rpc might throw error due to rate limits
    
-> made rpc calls more efficient using multicall
  • when prompting eg "fetch usdc balance", LLM often hallucinates address (for example taking usdc address from mainnet, not base)
    
-> refined action description + added new action to retrieve commonly used token addresses by symbol for given network
In addition, the following improvements are made:
  • WalletActionProvider native_transfer takes amount in whole units as input and passes this to walletProviders. However, most of them expect atomic units instead -> this is now handled consistently as follows: action takes whole unit format as input, converts to atomic units and then calls internal native_transfer from walletProviders with that
  • remove hardcoded erc20 abi in favor of viem export
  • added guardrails for erc20 transfers to prevent loss of funds by sending to token contracts
  • added optional address arg (default to wallet address) to get_balance erc20 action
  • fixed examples/langchain-cdp-chatbot /chatbot.ts to correctly configure CdpSolanaWalletProvider
  • fixed native sol transfers for CdpSolanaWalletProvider that was throwing Error during transfer: Error: Signature must be 64 bytes long
Tests
Chatbot: typescript/examples/langchain-cdp-chatbot/chatbot.ts
Network: Base mainnet
Prompt: wallet info
-------------------
Wallet Details:
- Provider: cdp_evm_wallet_provider
- Address: 0xf2d4580ADfe8E012f5550322706d62DF11fDBE21
- Network:
* Protocol Family: evm
* Network ID: base-mainnet
* Chain ID: 8453
- Native Balance: 411444858090719 WEI
- Native Balance: 0.000411444858090719 ETH
-------------------
Here are the details of your wallet:
- **Address:** 0xf2d4580ADfe8E012f5550322706d62DF11fDBE21
- **Provider:** cdp_evm_wallet_provider
- **Network:**
- **Protocol Family:** EVM
- **Network ID:** base-mainnet
- **Chain ID:** 8453
- **Native Token Balance:** 0.000411444858090719 ETH
-------------------
Prompt: fetch usdc and cbbtc balance
-------------------
Token address for USDC on base-mainnet: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
-------------------
-------------------
Balance of USD Coin (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) at address 0xf2d4580ADfe8E012f5550322706d62DF11fDBE21 is 0.231121
-------------------
Here are your balances for USDC and CBBTC:
- **USDC Balance:** 0.231121 USDC
- **CBBTC Balance:** 0.00000024 CBBTC
If you need any further assistance, let me know!
-------------------
Prompt: check bankr balance
-------------------
Error: Token symbol "BANKR" not found on base-mainnet. Available token symbols on base-mainnet: USDC, EURC, CBBTC, CBETH, WETH, ZORA, AERO, BNKR, CLANKER
-------------------
-------------------
Token address for BNKR on base-mainnet: 0x22af33fe49fd1fa80c7149773dde5890d3c76f3b
-------------------
-------------------
Balance of BankrCoin (0x22af33fe49fd1fa80c7149773dde5890d3c76f3b) at address 0xf2d4580ADfe8E012f5550322706d62DF11fDBE21 is 0
-------------------
Your balance for BankrCoin (BNKR) is **0**. If you need assistance with anything else, feel free to ask!
-------------------
Prompt: send 0.001 usdc to 0xa8c1a5D3C372C65c04f91f87a43F549619A9483f
Transferred 0.001 of USD Coin (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) to 0xa8c1a5D3C372C65c04f91f87a43F549619A9483f.
Transaction hash for the transfer: 0xfc070337f72b5e154e556d007efc6418ff8c74bcc29c087107e07efdcc16daf2
-------------------
I have successfully transferred **0.001 USDC** to the address **0xa8c1a5D3C372C65c04f91f87a43F549619A9483f**. The transaction hash is: **0xfc070337f72b5e154e556d007efc6418ff8c74bcc29c087107e07efdcc16daf2**.
If you need anything else, just let me know!
-------------------
Prompt: send 0.000001 eth to 0xa8c1a5D3C372C65c04f91f87a43F549619A9483f
-------------------
Transferred 0.000001 ETH to 0xa8c1a5D3C372C65c04f91f87a43F549619A9483f
Transaction hash: 0xeafcac9aa1beb05a2dd72362741939287b6b951ef70a96de38252d5270b08221
-------------------
I have successfully transferred **0.000001 ETH** to the address **0xa8c1a5D3C372C65c04f91f87a43F549619A9483f**.
The transaction hash is: **0xeafcac9aa1beb05a2dd72362741939287b6b951ef70a96de38252d5270b08221**.
Prompt: check usdc balance for 0xa8c1a5D3C372C65c04f91f87a43F549619A9483f
----------
Balance of USD Coin (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) at address 0xa8c1a5D3C372C65c04f91f87a43F549619A9483f is 9.076885
-------------------
The balance of USDC for the address **0xa8c1a5D3C372C65c04f91f87a43F549619A9483f** is **9.076885 USDC**.

Chatbot: typescript/examples/langchain-cdp-chatbot/chatbot.ts
Network: Solana devnet
Prompt: send 0.0001 sol to 91sEBA6DLKakGV4raqW2pE8bmQR1D9dnbdGTjtATur5U -------------------
Transferred 0.0001 SOL to 91sEBA6DLKakGV4raqW2pE8bmQR1D9dnbdGTjtATur5U
Signature: 45MJKkm5CEQbCED8s7Ykz8P8bFySyqXq8AoLWzXW2NXUMMWwW2hcUs22yux1M9q5RHvcUGvcVbgHyy3sHGVC6CyM
-------------------
The transfer of 0.0001 SOL to the address **91sEBA6DLKakGV4raqW2pE8bmQR1D9dnbdGTjtATur5U** has been successfully completed. Transaction Signature: **45MJKkm5CEQbCED8s7Ykz8P8bFySyqXq8AoLWzXW2NXUMMWwW2hcUs22yux1M9q5RHvcUGvcVbgHyy3sHGVC6CyM**

Checklist
A couple of things to include in your PR for completeness:
  •  Added documentation to all relevant README.md files
  •  Added a changelog entry
@cb-heimdall
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@phdargen
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Fantastic work, ty! Lots of little chores we've been meaning to get to all wrapped up in one nice package
@CarsonRoscoe
CarsonRoscoe
merged commit 5e133ea
into
coinbase:mainSep 5, 2025

26 checks passed

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@CarsonRoscoeCarsonRoscoeCarsonRoscoe approved these changes
@murrlincolnmurrlincolnmurrlincoln approved these changes

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action providerNew action providerdocumentationImprovements or additions to documentationexampleNew example agenttypescriptwallet providerNew wallet provider

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@phdargen@cb-heimdall@CarsonRoscoe@murrlincoln

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Force GitHub README to respect dark mode\n(function() {\n var style = document.createElement('style');\n style.textContent = '\n .markdown-body {\n color-scheme: dark light;\n }\n .markdown-body pre { background: #161b22 !important; }\n .markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }\n .markdown-body table th, .markdown-body table td { border-color: #30363d !important; }\n .markdown-body img { background: #0d1117; }\n .markdown-body blockquote { border-left-color: #8b949e; }\n .markdown-body hr { border-color: #30363d; }\n ';\n document.head.appendChild(style);\n})();", "GitHub Dark Mode README Fix");
}
} catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
Fix unit issues in balance/transfer actions - #835
Merged
CarsonRoscoe merged 6 commits into
coinbase:mainfrom 
phdargen:fixBalanceFormat
Sep 5, 2025
Merged
Fix unit issues in balance/transfer actions#835
CarsonRoscoe merged 6 commits into
coinbase:mainfrom 
phdargen:fixBalanceFormat
Conversation
@phdargen
@phdargenphdargen
commented
Sep 4, 2025•

edited

Loading

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Contributor
Description
Fixes issues for native/erc20 balance actions reported by @Story91:
  • get_wallet_details returns ETH amount in wei, LLM converts this to whole units in message to user. Result of conversion depends on LLM knowledge, gpt-4o-mini always got it wrong in my tests
    
-> get_wallet_details returns now both amount in wei and whole units
  • when several erc20 token balances are queried in one prompt, default rpc might throw error due to rate limits
    
-> made rpc calls more efficient using multicall
  • when prompting eg "fetch usdc balance", LLM often hallucinates address (for example taking usdc address from mainnet, not base)
    
-> refined action description + added new action to retrieve commonly used token addresses by symbol for given network
In addition, the following improvements are made:
  • WalletActionProvider native_transfer takes amount in whole units as input and passes this to walletProviders. However, most of them expect atomic units instead -> this is now handled consistently as follows: action takes whole unit format as input, converts to atomic units and then calls internal native_transfer from walletProviders with that
  • remove hardcoded erc20 abi in favor of viem export
  • added guardrails for erc20 transfers to prevent loss of funds by sending to token contracts
  • added optional address arg (default to wallet address) to get_balance erc20 action
  • fixed examples/langchain-cdp-chatbot /chatbot.ts to correctly configure CdpSolanaWalletProvider
  • fixed native sol transfers for CdpSolanaWalletProvider that was throwing Error during transfer: Error: Signature must be 64 bytes long
Tests
Chatbot: typescript/examples/langchain-cdp-chatbot/chatbot.ts
Network: Base mainnet
Prompt: wallet info
-------------------
Wallet Details:
- Provider: cdp_evm_wallet_provider
- Address: 0xf2d4580ADfe8E012f5550322706d62DF11fDBE21
- Network:
* Protocol Family: evm
* Network ID: base-mainnet
* Chain ID: 8453
- Native Balance: 411444858090719 WEI
- Native Balance: 0.000411444858090719 ETH
-------------------
Here are the details of your wallet:
- **Address:** 0xf2d4580ADfe8E012f5550322706d62DF11fDBE21
- **Provider:** cdp_evm_wallet_provider
- **Network:**
- **Protocol Family:** EVM
- **Network ID:** base-mainnet
- **Chain ID:** 8453
- **Native Token Balance:** 0.000411444858090719 ETH
-------------------
Prompt: fetch usdc and cbbtc balance
-------------------
Token address for USDC on base-mainnet: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
-------------------
-------------------
Balance of USD Coin (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) at address 0xf2d4580ADfe8E012f5550322706d62DF11fDBE21 is 0.231121
-------------------
Here are your balances for USDC and CBBTC:
- **USDC Balance:** 0.231121 USDC
- **CBBTC Balance:** 0.00000024 CBBTC
If you need any further assistance, let me know!
-------------------
Prompt: check bankr balance
-------------------
Error: Token symbol "BANKR" not found on base-mainnet. Available token symbols on base-mainnet: USDC, EURC, CBBTC, CBETH, WETH, ZORA, AERO, BNKR, CLANKER
-------------------
-------------------
Token address for BNKR on base-mainnet: 0x22af33fe49fd1fa80c7149773dde5890d3c76f3b
-------------------
-------------------
Balance of BankrCoin (0x22af33fe49fd1fa80c7149773dde5890d3c76f3b) at address 0xf2d4580ADfe8E012f5550322706d62DF11fDBE21 is 0
-------------------
Your balance for BankrCoin (BNKR) is **0**. If you need assistance with anything else, feel free to ask!
-------------------
Prompt: send 0.001 usdc to 0xa8c1a5D3C372C65c04f91f87a43F549619A9483f
Transferred 0.001 of USD Coin (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) to 0xa8c1a5D3C372C65c04f91f87a43F549619A9483f.
Transaction hash for the transfer: 0xfc070337f72b5e154e556d007efc6418ff8c74bcc29c087107e07efdcc16daf2
-------------------
I have successfully transferred **0.001 USDC** to the address **0xa8c1a5D3C372C65c04f91f87a43F549619A9483f**. The transaction hash is: **0xfc070337f72b5e154e556d007efc6418ff8c74bcc29c087107e07efdcc16daf2**.
If you need anything else, just let me know!
-------------------
Prompt: send 0.000001 eth to 0xa8c1a5D3C372C65c04f91f87a43F549619A9483f
-------------------
Transferred 0.000001 ETH to 0xa8c1a5D3C372C65c04f91f87a43F549619A9483f
Transaction hash: 0xeafcac9aa1beb05a2dd72362741939287b6b951ef70a96de38252d5270b08221
-------------------
I have successfully transferred **0.000001 ETH** to the address **0xa8c1a5D3C372C65c04f91f87a43F549619A9483f**.
The transaction hash is: **0xeafcac9aa1beb05a2dd72362741939287b6b951ef70a96de38252d5270b08221**.
Prompt: check usdc balance for 0xa8c1a5D3C372C65c04f91f87a43F549619A9483f
----------
Balance of USD Coin (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) at address 0xa8c1a5D3C372C65c04f91f87a43F549619A9483f is 9.076885
-------------------
The balance of USDC for the address **0xa8c1a5D3C372C65c04f91f87a43F549619A9483f** is **9.076885 USDC**.

Chatbot: typescript/examples/langchain-cdp-chatbot/chatbot.ts
Network: Solana devnet
Prompt: send 0.0001 sol to 91sEBA6DLKakGV4raqW2pE8bmQR1D9dnbdGTjtATur5U -------------------
Transferred 0.0001 SOL to 91sEBA6DLKakGV4raqW2pE8bmQR1D9dnbdGTjtATur5U
Signature: 45MJKkm5CEQbCED8s7Ykz8P8bFySyqXq8AoLWzXW2NXUMMWwW2hcUs22yux1M9q5RHvcUGvcVbgHyy3sHGVC6CyM
-------------------
The transfer of 0.0001 SOL to the address **91sEBA6DLKakGV4raqW2pE8bmQR1D9dnbdGTjtATur5U** has been successfully completed. Transaction Signature: **45MJKkm5CEQbCED8s7Ykz8P8bFySyqXq8AoLWzXW2NXUMMWwW2hcUs22yux1M9q5RHvcUGvcVbgHyy3sHGVC6CyM**

Checklist
A couple of things to include in your PR for completeness:
  •  Added documentation to all relevant README.md files
  •  Added a changelog entry
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Fantastic work, ty! Lots of little chores we've been meaning to get to all wrapped up in one nice package
@CarsonRoscoe
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Highlight search terms from Google/DuckDuckGo/Bing referrer\n(function() {\n var ref = document.referrer;\n var terms = [];\n \n if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {\n var url = new URL(ref);\n var q = url.searchParams.get('q') || url.searchParams.get('p');\n if (q) {\n terms = q.split(/\\s+/).filter(function(t) { return t.length > 2; });\n }\n }\n \n if (terms.length === 0) return;\n \n var style = document.createElement('style');\n style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';\n document.head.appendChild(style);\n \n function highlight(node) {\n if (node.nodeType === 3) { // text node\n var text = node.textContent;\n var found = false;\n terms.forEach(function(term) {\n var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\\]\\\\]/g, '\\\\') + ')', 'gi');\n if (regex.test(text)) {\n found = true;\n var frag = document.createDocumentFragment();\n var parts = text.split(regex);\n parts.forEach(function(part, i) {\n if (i % 2 === 0) {\n frag.appendChild(document.createTextNode(part));\n } else {\n var span = document.createElement('span');\n span.className = 'userscript-highlight';\n span.textContent = part;\n frag.appendChild(span);\n }\n });\n node.parentNode.replaceChild(frag, node);\n }\n });\n } else if (node.nodeType === 1 && node.childNodes) { // element\n var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];\n if (!skipTags.includes(node.tagName)) {\n Array.from(node.childNodes).forEach(highlight);\n }\n }\n }\n \n highlight(document.body);\n \n // Re-highlight on dynamic content\n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1 || node.nodeType === 3) highlight(node);\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Highlight Search Terms");
}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
Fix unit issues in balance/transfer actions - #835
Merged
CarsonRoscoe merged 6 commits into
coinbase:mainfrom 
phdargen:fixBalanceFormat
Sep 5, 2025
Merged
Fix unit issues in balance/transfer actions#835
CarsonRoscoe merged 6 commits into
coinbase:mainfrom 
phdargen:fixBalanceFormat
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@phdargen
@phdargenphdargen
commented
Sep 4, 2025•

edited

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Description
Fixes issues for native/erc20 balance actions reported by @Story91:
  • get_wallet_details returns ETH amount in wei, LLM converts this to whole units in message to user. Result of conversion depends on LLM knowledge, gpt-4o-mini always got it wrong in my tests
    
-> get_wallet_details returns now both amount in wei and whole units
  • when several erc20 token balances are queried in one prompt, default rpc might throw error due to rate limits
    
-> made rpc calls more efficient using multicall
  • when prompting eg "fetch usdc balance", LLM often hallucinates address (for example taking usdc address from mainnet, not base)
    
-> refined action description + added new action to retrieve commonly used token addresses by symbol for given network
In addition, the following improvements are made:
  • WalletActionProvider native_transfer takes amount in whole units as input and passes this to walletProviders. However, most of them expect atomic units instead -> this is now handled consistently as follows: action takes whole unit format as input, converts to atomic units and then calls internal native_transfer from walletProviders with that
  • remove hardcoded erc20 abi in favor of viem export
  • added guardrails for erc20 transfers to prevent loss of funds by sending to token contracts
  • added optional address arg (default to wallet address) to get_balance erc20 action
  • fixed examples/langchain-cdp-chatbot /chatbot.ts to correctly configure CdpSolanaWalletProvider
  • fixed native sol transfers for CdpSolanaWalletProvider that was throwing Error during transfer: Error: Signature must be 64 bytes long
Tests
Chatbot: typescript/examples/langchain-cdp-chatbot/chatbot.ts
Network: Base mainnet
Prompt: wallet info
-------------------
Wallet Details:
- Provider: cdp_evm_wallet_provider
- Address: 0xf2d4580ADfe8E012f5550322706d62DF11fDBE21
- Network:
* Protocol Family: evm
* Network ID: base-mainnet
* Chain ID: 8453
- Native Balance: 411444858090719 WEI
- Native Balance: 0.000411444858090719 ETH
-------------------
Here are the details of your wallet:
- **Address:** 0xf2d4580ADfe8E012f5550322706d62DF11fDBE21
- **Provider:** cdp_evm_wallet_provider
- **Network:**
- **Protocol Family:** EVM
- **Network ID:** base-mainnet
- **Chain ID:** 8453
- **Native Token Balance:** 0.000411444858090719 ETH
-------------------
Prompt: fetch usdc and cbbtc balance
-------------------
Token address for USDC on base-mainnet: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
-------------------
-------------------
Balance of USD Coin (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) at address 0xf2d4580ADfe8E012f5550322706d62DF11fDBE21 is 0.231121
-------------------
Here are your balances for USDC and CBBTC:
- **USDC Balance:** 0.231121 USDC
- **CBBTC Balance:** 0.00000024 CBBTC
If you need any further assistance, let me know!
-------------------
Prompt: check bankr balance
-------------------
Error: Token symbol "BANKR" not found on base-mainnet. Available token symbols on base-mainnet: USDC, EURC, CBBTC, CBETH, WETH, ZORA, AERO, BNKR, CLANKER
-------------------
-------------------
Token address for BNKR on base-mainnet: 0x22af33fe49fd1fa80c7149773dde5890d3c76f3b
-------------------
-------------------
Balance of BankrCoin (0x22af33fe49fd1fa80c7149773dde5890d3c76f3b) at address 0xf2d4580ADfe8E012f5550322706d62DF11fDBE21 is 0
-------------------
Your balance for BankrCoin (BNKR) is **0**. If you need assistance with anything else, feel free to ask!
-------------------
Prompt: send 0.001 usdc to 0xa8c1a5D3C372C65c04f91f87a43F549619A9483f
Transferred 0.001 of USD Coin (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) to 0xa8c1a5D3C372C65c04f91f87a43F549619A9483f.
Transaction hash for the transfer: 0xfc070337f72b5e154e556d007efc6418ff8c74bcc29c087107e07efdcc16daf2
-------------------
I have successfully transferred **0.001 USDC** to the address **0xa8c1a5D3C372C65c04f91f87a43F549619A9483f**. The transaction hash is: **0xfc070337f72b5e154e556d007efc6418ff8c74bcc29c087107e07efdcc16daf2**.
If you need anything else, just let me know!
-------------------
Prompt: send 0.000001 eth to 0xa8c1a5D3C372C65c04f91f87a43F549619A9483f
-------------------
Transferred 0.000001 ETH to 0xa8c1a5D3C372C65c04f91f87a43F549619A9483f
Transaction hash: 0xeafcac9aa1beb05a2dd72362741939287b6b951ef70a96de38252d5270b08221
-------------------
I have successfully transferred **0.000001 ETH** to the address **0xa8c1a5D3C372C65c04f91f87a43F549619A9483f**.
The transaction hash is: **0xeafcac9aa1beb05a2dd72362741939287b6b951ef70a96de38252d5270b08221**.
Prompt: check usdc balance for 0xa8c1a5D3C372C65c04f91f87a43F549619A9483f
----------
Balance of USD Coin (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) at address 0xa8c1a5D3C372C65c04f91f87a43F549619A9483f is 9.076885
-------------------
The balance of USDC for the address **0xa8c1a5D3C372C65c04f91f87a43F549619A9483f** is **9.076885 USDC**.

Chatbot: typescript/examples/langchain-cdp-chatbot/chatbot.ts
Network: Solana devnet
Prompt: send 0.0001 sol to 91sEBA6DLKakGV4raqW2pE8bmQR1D9dnbdGTjtATur5U -------------------
Transferred 0.0001 SOL to 91sEBA6DLKakGV4raqW2pE8bmQR1D9dnbdGTjtATur5U
Signature: 45MJKkm5CEQbCED8s7Ykz8P8bFySyqXq8AoLWzXW2NXUMMWwW2hcUs22yux1M9q5RHvcUGvcVbgHyy3sHGVC6CyM
-------------------
The transfer of 0.0001 SOL to the address **91sEBA6DLKakGV4raqW2pE8bmQR1D9dnbdGTjtATur5U** has been successfully completed. Transaction Signature: **45MJKkm5CEQbCED8s7Ykz8P8bFySyqXq8AoLWzXW2NXUMMWwW2hcUs22yux1M9q5RHvcUGvcVbgHyy3sHGVC6CyM**

Checklist
A couple of things to include in your PR for completeness:
  •  Added documentation to all relevant README.md files
  •  Added a changelog entry
@cb-heimdall
cb-heimdall
commented
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edited

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✅ Heimdall Review Status
RequirementStatusMore Info
Reviews
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2/1
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Show calculation
1 if user is bot0
1 if user is external0
2 if repo is sensitive0

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@phdargen
phdargen
marked this pull request as draft
September 4, 2025 03:39
@github-actionsgithub-actionsBot
added

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New action provider
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New wallet provider
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Sep 4, 2025
@phdargen
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marked this pull request as ready for review
September 4, 2025 04:20
@phdargen
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Fantastic work, ty! Lots of little chores we've been meaning to get to all wrapped up in one nice package
@CarsonRoscoe
CarsonRoscoe
merged commit 5e133ea
into
coinbase:mainSep 5, 2025

26 checks passed

@github-actionsgithub-actionsBot
mentioned this pull request
Sep 3, 2025
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@CarsonRoscoeCarsonRoscoe
mentioned this pull request
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@phdargenphdargen
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@CarsonRoscoeCarsonRoscoeCarsonRoscoe approved these changes
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Strip utm_, fbclid, gclid, etc. from all links on page\n(function() {\n var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',\n 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',\n 'ref', 'ref_src', 'source', 'medium', 'campaign'];\n \n function cleanUrl(url) {\n try {\n var u = new URL(url, window.location.origin);\n var changed = false;\n trackingParams.forEach(function(p) {\n if (u.searchParams.has(p)) {\n u.searchParams.delete(p);\n changed = true;\n }\n });\n return changed ? u.toString() : url;\n } catch (e) {\n return url;\n }\n }\n \n function cleanLinks() {\n document.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n \n cleanLinks();\n \n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1) {\n if (node.tagName === 'A') cleanLinks();\n node.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Remove Tracking Parameters from Links");
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '

Skip to content
Fix unit issues in balance/transfer actions - #835
Merged
CarsonRoscoe merged 6 commits into
coinbase:mainfrom 
phdargen:fixBalanceFormat
Sep 5, 2025
Merged
Fix unit issues in balance/transfer actions#835
CarsonRoscoe merged 6 commits into
coinbase:mainfrom 
phdargen:fixBalanceFormat
Conversation
@phdargen
@phdargenphdargen
commented
Sep 4, 2025•

edited

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Contributor
Description
Fixes issues for native/erc20 balance actions reported by @Story91:
  • get_wallet_details returns ETH amount in wei, LLM converts this to whole units in message to user. Result of conversion depends on LLM knowledge, gpt-4o-mini always got it wrong in my tests
    
-> get_wallet_details returns now both amount in wei and whole units
  • when several erc20 token balances are queried in one prompt, default rpc might throw error due to rate limits
    
-> made rpc calls more efficient using multicall
  • when prompting eg "fetch usdc balance", LLM often hallucinates address (for example taking usdc address from mainnet, not base)
    
-> refined action description + added new action to retrieve commonly used token addresses by symbol for given network
In addition, the following improvements are made:
  • WalletActionProvider native_transfer takes amount in whole units as input and passes this to walletProviders. However, most of them expect atomic units instead -> this is now handled consistently as follows: action takes whole unit format as input, converts to atomic units and then calls internal native_transfer from walletProviders with that
  • remove hardcoded erc20 abi in favor of viem export
  • added guardrails for erc20 transfers to prevent loss of funds by sending to token contracts
  • added optional address arg (default to wallet address) to get_balance erc20 action
  • fixed examples/langchain-cdp-chatbot /chatbot.ts to correctly configure CdpSolanaWalletProvider
  • fixed native sol transfers for CdpSolanaWalletProvider that was throwing Error during transfer: Error: Signature must be 64 bytes long
Tests
Chatbot: typescript/examples/langchain-cdp-chatbot/chatbot.ts
Network: Base mainnet
Prompt: wallet info
-------------------
Wallet Details:
- Provider: cdp_evm_wallet_provider
- Address: 0xf2d4580ADfe8E012f5550322706d62DF11fDBE21
- Network:
* Protocol Family: evm
* Network ID: base-mainnet
* Chain ID: 8453
- Native Balance: 411444858090719 WEI
- Native Balance: 0.000411444858090719 ETH
-------------------
Here are the details of your wallet:
- **Address:** 0xf2d4580ADfe8E012f5550322706d62DF11fDBE21
- **Provider:** cdp_evm_wallet_provider
- **Network:**
- **Protocol Family:** EVM
- **Network ID:** base-mainnet
- **Chain ID:** 8453
- **Native Token Balance:** 0.000411444858090719 ETH
-------------------
Prompt: fetch usdc and cbbtc balance
-------------------
Token address for USDC on base-mainnet: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
-------------------
-------------------
Balance of USD Coin (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) at address 0xf2d4580ADfe8E012f5550322706d62DF11fDBE21 is 0.231121
-------------------
Here are your balances for USDC and CBBTC:
- **USDC Balance:** 0.231121 USDC
- **CBBTC Balance:** 0.00000024 CBBTC
If you need any further assistance, let me know!
-------------------
Prompt: check bankr balance
-------------------
Error: Token symbol "BANKR" not found on base-mainnet. Available token symbols on base-mainnet: USDC, EURC, CBBTC, CBETH, WETH, ZORA, AERO, BNKR, CLANKER
-------------------
-------------------
Token address for BNKR on base-mainnet: 0x22af33fe49fd1fa80c7149773dde5890d3c76f3b
-------------------
-------------------
Balance of BankrCoin (0x22af33fe49fd1fa80c7149773dde5890d3c76f3b) at address 0xf2d4580ADfe8E012f5550322706d62DF11fDBE21 is 0
-------------------
Your balance for BankrCoin (BNKR) is **0**. If you need assistance with anything else, feel free to ask!
-------------------
Prompt: send 0.001 usdc to 0xa8c1a5D3C372C65c04f91f87a43F549619A9483f
Transferred 0.001 of USD Coin (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) to 0xa8c1a5D3C372C65c04f91f87a43F549619A9483f.
Transaction hash for the transfer: 0xfc070337f72b5e154e556d007efc6418ff8c74bcc29c087107e07efdcc16daf2
-------------------
I have successfully transferred **0.001 USDC** to the address **0xa8c1a5D3C372C65c04f91f87a43F549619A9483f**. The transaction hash is: **0xfc070337f72b5e154e556d007efc6418ff8c74bcc29c087107e07efdcc16daf2**.
If you need anything else, just let me know!
-------------------
Prompt: send 0.000001 eth to 0xa8c1a5D3C372C65c04f91f87a43F549619A9483f
-------------------
Transferred 0.000001 ETH to 0xa8c1a5D3C372C65c04f91f87a43F549619A9483f
Transaction hash: 0xeafcac9aa1beb05a2dd72362741939287b6b951ef70a96de38252d5270b08221
-------------------
I have successfully transferred **0.000001 ETH** to the address **0xa8c1a5D3C372C65c04f91f87a43F549619A9483f**.
The transaction hash is: **0xeafcac9aa1beb05a2dd72362741939287b6b951ef70a96de38252d5270b08221**.
Prompt: check usdc balance for 0xa8c1a5D3C372C65c04f91f87a43F549619A9483f
----------
Balance of USD Coin (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) at address 0xa8c1a5D3C372C65c04f91f87a43F549619A9483f is 9.076885
-------------------
The balance of USDC for the address **0xa8c1a5D3C372C65c04f91f87a43F549619A9483f** is **9.076885 USDC**.

Chatbot: typescript/examples/langchain-cdp-chatbot/chatbot.ts
Network: Solana devnet
Prompt: send 0.0001 sol to 91sEBA6DLKakGV4raqW2pE8bmQR1D9dnbdGTjtATur5U -------------------
Transferred 0.0001 SOL to 91sEBA6DLKakGV4raqW2pE8bmQR1D9dnbdGTjtATur5U
Signature: 45MJKkm5CEQbCED8s7Ykz8P8bFySyqXq8AoLWzXW2NXUMMWwW2hcUs22yux1M9q5RHvcUGvcVbgHyy3sHGVC6CyM
-------------------
The transfer of 0.0001 SOL to the address **91sEBA6DLKakGV4raqW2pE8bmQR1D9dnbdGTjtATur5U** has been successfully completed. Transaction Signature: **45MJKkm5CEQbCED8s7Ykz8P8bFySyqXq8AoLWzXW2NXUMMWwW2hcUs22yux1M9q5RHvcUGvcVbgHyy3sHGVC6CyM**

Checklist
A couple of things to include in your PR for completeness:
  •  Added documentation to all relevant README.md files
  •  Added a changelog entry
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Fantastic work, ty! Lots of little chores we've been meaning to get to all wrapped up in one nice package
@CarsonRoscoe
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Auto-enable theater mode on YouTube\n(function() {\n function tryTheater() {\n var btn = document.querySelector('button[aria-label=\"Theater mode\"], ytd-player #player button[title=\"Theater mode\"]');\n if (btn && !btn.classList.contains('activated')) {\n btn.click();\n }\n }\n \n // Try immediately\n tryTheater();\n \n // Try after navigation (SPA)\n var lastUrl = location.href;\n setInterval(function() {\n if (location.href !== lastUrl) {\n lastUrl = location.href;\n setTimeout(tryTheater, 500);\n }\n }, 1000);\n \n // Also try on player load\n var observer = new MutationObserver(tryTheater);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "YouTube Theater Mode Default");
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
Fix unit issues in balance/transfer actions - #835
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CarsonRoscoe merged 6 commits into
coinbase:mainfrom 
phdargen:fixBalanceFormat
Sep 5, 2025
Merged
Fix unit issues in balance/transfer actions#835
CarsonRoscoe merged 6 commits into
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phdargen:fixBalanceFormat
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@phdargenphdargen
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Sep 4, 2025•

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Description
Fixes issues for native/erc20 balance actions reported by @Story91:
  • get_wallet_details returns ETH amount in wei, LLM converts this to whole units in message to user. Result of conversion depends on LLM knowledge, gpt-4o-mini always got it wrong in my tests
    
-> get_wallet_details returns now both amount in wei and whole units
  • when several erc20 token balances are queried in one prompt, default rpc might throw error due to rate limits
    
-> made rpc calls more efficient using multicall
  • when prompting eg "fetch usdc balance", LLM often hallucinates address (for example taking usdc address from mainnet, not base)
    
-> refined action description + added new action to retrieve commonly used token addresses by symbol for given network
In addition, the following improvements are made:
  • WalletActionProvider native_transfer takes amount in whole units as input and passes this to walletProviders. However, most of them expect atomic units instead -> this is now handled consistently as follows: action takes whole unit format as input, converts to atomic units and then calls internal native_transfer from walletProviders with that
  • remove hardcoded erc20 abi in favor of viem export
  • added guardrails for erc20 transfers to prevent loss of funds by sending to token contracts
  • added optional address arg (default to wallet address) to get_balance erc20 action
  • fixed examples/langchain-cdp-chatbot /chatbot.ts to correctly configure CdpSolanaWalletProvider
  • fixed native sol transfers for CdpSolanaWalletProvider that was throwing Error during transfer: Error: Signature must be 64 bytes long
Tests
Chatbot: typescript/examples/langchain-cdp-chatbot/chatbot.ts
Network: Base mainnet
Prompt: wallet info
-------------------
Wallet Details:
- Provider: cdp_evm_wallet_provider
- Address: 0xf2d4580ADfe8E012f5550322706d62DF11fDBE21
- Network:
* Protocol Family: evm
* Network ID: base-mainnet
* Chain ID: 8453
- Native Balance: 411444858090719 WEI
- Native Balance: 0.000411444858090719 ETH
-------------------
Here are the details of your wallet:
- **Address:** 0xf2d4580ADfe8E012f5550322706d62DF11fDBE21
- **Provider:** cdp_evm_wallet_provider
- **Network:**
- **Protocol Family:** EVM
- **Network ID:** base-mainnet
- **Chain ID:** 8453
- **Native Token Balance:** 0.000411444858090719 ETH
-------------------
Prompt: fetch usdc and cbbtc balance
-------------------
Token address for USDC on base-mainnet: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
-------------------
-------------------
Balance of USD Coin (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) at address 0xf2d4580ADfe8E012f5550322706d62DF11fDBE21 is 0.231121
-------------------
Here are your balances for USDC and CBBTC:
- **USDC Balance:** 0.231121 USDC
- **CBBTC Balance:** 0.00000024 CBBTC
If you need any further assistance, let me know!
-------------------
Prompt: check bankr balance
-------------------
Error: Token symbol "BANKR" not found on base-mainnet. Available token symbols on base-mainnet: USDC, EURC, CBBTC, CBETH, WETH, ZORA, AERO, BNKR, CLANKER
-------------------
-------------------
Token address for BNKR on base-mainnet: 0x22af33fe49fd1fa80c7149773dde5890d3c76f3b
-------------------
-------------------
Balance of BankrCoin (0x22af33fe49fd1fa80c7149773dde5890d3c76f3b) at address 0xf2d4580ADfe8E012f5550322706d62DF11fDBE21 is 0
-------------------
Your balance for BankrCoin (BNKR) is **0**. If you need assistance with anything else, feel free to ask!
-------------------
Prompt: send 0.001 usdc to 0xa8c1a5D3C372C65c04f91f87a43F549619A9483f
Transferred 0.001 of USD Coin (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) to 0xa8c1a5D3C372C65c04f91f87a43F549619A9483f.
Transaction hash for the transfer: 0xfc070337f72b5e154e556d007efc6418ff8c74bcc29c087107e07efdcc16daf2
-------------------
I have successfully transferred **0.001 USDC** to the address **0xa8c1a5D3C372C65c04f91f87a43F549619A9483f**. The transaction hash is: **0xfc070337f72b5e154e556d007efc6418ff8c74bcc29c087107e07efdcc16daf2**.
If you need anything else, just let me know!
-------------------
Prompt: send 0.000001 eth to 0xa8c1a5D3C372C65c04f91f87a43F549619A9483f
-------------------
Transferred 0.000001 ETH to 0xa8c1a5D3C372C65c04f91f87a43F549619A9483f
Transaction hash: 0xeafcac9aa1beb05a2dd72362741939287b6b951ef70a96de38252d5270b08221
-------------------
I have successfully transferred **0.000001 ETH** to the address **0xa8c1a5D3C372C65c04f91f87a43F549619A9483f**.
The transaction hash is: **0xeafcac9aa1beb05a2dd72362741939287b6b951ef70a96de38252d5270b08221**.
Prompt: check usdc balance for 0xa8c1a5D3C372C65c04f91f87a43F549619A9483f
----------
Balance of USD Coin (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) at address 0xa8c1a5D3C372C65c04f91f87a43F549619A9483f is 9.076885
-------------------
The balance of USDC for the address **0xa8c1a5D3C372C65c04f91f87a43F549619A9483f** is **9.076885 USDC**.

Chatbot: typescript/examples/langchain-cdp-chatbot/chatbot.ts
Network: Solana devnet
Prompt: send 0.0001 sol to 91sEBA6DLKakGV4raqW2pE8bmQR1D9dnbdGTjtATur5U -------------------
Transferred 0.0001 SOL to 91sEBA6DLKakGV4raqW2pE8bmQR1D9dnbdGTjtATur5U
Signature: 45MJKkm5CEQbCED8s7Ykz8P8bFySyqXq8AoLWzXW2NXUMMWwW2hcUs22yux1M9q5RHvcUGvcVbgHyy3sHGVC6CyM
-------------------
The transfer of 0.0001 SOL to the address **91sEBA6DLKakGV4raqW2pE8bmQR1D9dnbdGTjtATur5U** has been successfully completed. Transaction Signature: **45MJKkm5CEQbCED8s7Ykz8P8bFySyqXq8AoLWzXW2NXUMMWwW2hcUs22yux1M9q5RHvcUGvcVbgHyy3sHGVC6CyM**

Checklist
A couple of things to include in your PR for completeness:
  •  Added documentation to all relevant README.md files
  •  Added a changelog entry
@cb-heimdall
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✅ Heimdall Review Status
RequirementStatusMore Info
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Show calculation
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1 if user is external0
2 if repo is sensitive0

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@phdargen
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marked this pull request as draft
September 4, 2025 03:39
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@phdargen
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Fantastic work, ty! Lots of little chores we've been meaning to get to all wrapped up in one nice package
@CarsonRoscoe
CarsonRoscoe
merged commit 5e133ea
into
coinbase:mainSep 5, 2025

26 checks passed

@github-actionsgithub-actionsBot
mentioned this pull request
Sep 3, 2025
 Open

@CarsonRoscoeCarsonRoscoe
mentioned this pull request
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@phdargenphdargen
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@CarsonRoscoeCarsonRoscoeCarsonRoscoe approved these changes
@murrlincolnmurrlincolnmurrlincoln approved these changes

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@phdargen@cb-heimdall@CarsonRoscoe@murrlincoln

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Remove or un-stick sticky/fixed headers that block content\n(function() {\n function unstick() {\n document.querySelectorAll('header, nav, [role=\"banner\"], .header, .navbar, .sticky, .fixed-top, [style*=\"position: fixed\"], [style*=\"position:sticky\"]').forEach(function(el) {\n if (el.style.position === 'fixed' || el.style.position === 'sticky' || \n getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {\n el.style.position = 'static';\n el.style.top = 'auto';\n el.style.zIndex = 'auto';\n }\n });\n }\n \n unstick();\n \n var observer = new MutationObserver(unstick);\n observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });\n})();", "Kill Sticky Headers");
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
Fix unit issues in balance/transfer actions - #835
Merged
CarsonRoscoe merged 6 commits into
coinbase:mainfrom 
phdargen:fixBalanceFormat
Sep 5, 2025
Merged
Fix unit issues in balance/transfer actions#835
CarsonRoscoe merged 6 commits into
coinbase:mainfrom 
phdargen:fixBalanceFormat
Conversation
@phdargen
@phdargenphdargen
commented
Sep 4, 2025•

edited

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Description
Fixes issues for native/erc20 balance actions reported by @Story91:
  • get_wallet_details returns ETH amount in wei, LLM converts this to whole units in message to user. Result of conversion depends on LLM knowledge, gpt-4o-mini always got it wrong in my tests
    
-> get_wallet_details returns now both amount in wei and whole units
  • when several erc20 token balances are queried in one prompt, default rpc might throw error due to rate limits
    
-> made rpc calls more efficient using multicall
  • when prompting eg "fetch usdc balance", LLM often hallucinates address (for example taking usdc address from mainnet, not base)
    
-> refined action description + added new action to retrieve commonly used token addresses by symbol for given network
In addition, the following improvements are made:
  • WalletActionProvider native_transfer takes amount in whole units as input and passes this to walletProviders. However, most of them expect atomic units instead -> this is now handled consistently as follows: action takes whole unit format as input, converts to atomic units and then calls internal native_transfer from walletProviders with that
  • remove hardcoded erc20 abi in favor of viem export
  • added guardrails for erc20 transfers to prevent loss of funds by sending to token contracts
  • added optional address arg (default to wallet address) to get_balance erc20 action
  • fixed examples/langchain-cdp-chatbot /chatbot.ts to correctly configure CdpSolanaWalletProvider
  • fixed native sol transfers for CdpSolanaWalletProvider that was throwing Error during transfer: Error: Signature must be 64 bytes long
Tests
Chatbot: typescript/examples/langchain-cdp-chatbot/chatbot.ts
Network: Base mainnet
Prompt: wallet info
-------------------
Wallet Details:
- Provider: cdp_evm_wallet_provider
- Address: 0xf2d4580ADfe8E012f5550322706d62DF11fDBE21
- Network:
* Protocol Family: evm
* Network ID: base-mainnet
* Chain ID: 8453
- Native Balance: 411444858090719 WEI
- Native Balance: 0.000411444858090719 ETH
-------------------
Here are the details of your wallet:
- **Address:** 0xf2d4580ADfe8E012f5550322706d62DF11fDBE21
- **Provider:** cdp_evm_wallet_provider
- **Network:**
- **Protocol Family:** EVM
- **Network ID:** base-mainnet
- **Chain ID:** 8453
- **Native Token Balance:** 0.000411444858090719 ETH
-------------------
Prompt: fetch usdc and cbbtc balance
-------------------
Token address for USDC on base-mainnet: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
-------------------
-------------------
Balance of USD Coin (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) at address 0xf2d4580ADfe8E012f5550322706d62DF11fDBE21 is 0.231121
-------------------
Here are your balances for USDC and CBBTC:
- **USDC Balance:** 0.231121 USDC
- **CBBTC Balance:** 0.00000024 CBBTC
If you need any further assistance, let me know!
-------------------
Prompt: check bankr balance
-------------------
Error: Token symbol "BANKR" not found on base-mainnet. Available token symbols on base-mainnet: USDC, EURC, CBBTC, CBETH, WETH, ZORA, AERO, BNKR, CLANKER
-------------------
-------------------
Token address for BNKR on base-mainnet: 0x22af33fe49fd1fa80c7149773dde5890d3c76f3b
-------------------
-------------------
Balance of BankrCoin (0x22af33fe49fd1fa80c7149773dde5890d3c76f3b) at address 0xf2d4580ADfe8E012f5550322706d62DF11fDBE21 is 0
-------------------
Your balance for BankrCoin (BNKR) is **0**. If you need assistance with anything else, feel free to ask!
-------------------
Prompt: send 0.001 usdc to 0xa8c1a5D3C372C65c04f91f87a43F549619A9483f
Transferred 0.001 of USD Coin (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) to 0xa8c1a5D3C372C65c04f91f87a43F549619A9483f.
Transaction hash for the transfer: 0xfc070337f72b5e154e556d007efc6418ff8c74bcc29c087107e07efdcc16daf2
-------------------
I have successfully transferred **0.001 USDC** to the address **0xa8c1a5D3C372C65c04f91f87a43F549619A9483f**. The transaction hash is: **0xfc070337f72b5e154e556d007efc6418ff8c74bcc29c087107e07efdcc16daf2**.
If you need anything else, just let me know!
-------------------
Prompt: send 0.000001 eth to 0xa8c1a5D3C372C65c04f91f87a43F549619A9483f
-------------------
Transferred 0.000001 ETH to 0xa8c1a5D3C372C65c04f91f87a43F549619A9483f
Transaction hash: 0xeafcac9aa1beb05a2dd72362741939287b6b951ef70a96de38252d5270b08221
-------------------
I have successfully transferred **0.000001 ETH** to the address **0xa8c1a5D3C372C65c04f91f87a43F549619A9483f**.
The transaction hash is: **0xeafcac9aa1beb05a2dd72362741939287b6b951ef70a96de38252d5270b08221**.
Prompt: check usdc balance for 0xa8c1a5D3C372C65c04f91f87a43F549619A9483f
----------
Balance of USD Coin (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) at address 0xa8c1a5D3C372C65c04f91f87a43F549619A9483f is 9.076885
-------------------
The balance of USDC for the address **0xa8c1a5D3C372C65c04f91f87a43F549619A9483f** is **9.076885 USDC**.

Chatbot: typescript/examples/langchain-cdp-chatbot/chatbot.ts
Network: Solana devnet
Prompt: send 0.0001 sol to 91sEBA6DLKakGV4raqW2pE8bmQR1D9dnbdGTjtATur5U -------------------
Transferred 0.0001 SOL to 91sEBA6DLKakGV4raqW2pE8bmQR1D9dnbdGTjtATur5U
Signature: 45MJKkm5CEQbCED8s7Ykz8P8bFySyqXq8AoLWzXW2NXUMMWwW2hcUs22yux1M9q5RHvcUGvcVbgHyy3sHGVC6CyM
-------------------
The transfer of 0.0001 SOL to the address **91sEBA6DLKakGV4raqW2pE8bmQR1D9dnbdGTjtATur5U** has been successfully completed. Transaction Signature: **45MJKkm5CEQbCED8s7Ykz8P8bFySyqXq8AoLWzXW2NXUMMWwW2hcUs22yux1M9q5RHvcUGvcVbgHyy3sHGVC6CyM**

Checklist
A couple of things to include in your PR for completeness:
  •  Added documentation to all relevant README.md files
  •  Added a changelog entry
@cb-heimdall
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marked this pull request as draft
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added

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marked this pull request as ready for review
September 4, 2025 04:20
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Fantastic work, ty! Lots of little chores we've been meaning to get to all wrapped up in one nice package
@CarsonRoscoe
CarsonRoscoe
merged commit 5e133ea
into
coinbase:mainSep 5, 2025

26 checks passed

@github-actionsgithub-actionsBot
mentioned this pull request
Sep 3, 2025
 Open

@CarsonRoscoeCarsonRoscoe
mentioned this pull request
Sep 5, 2025
 Merged

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mentioned this pull request
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 Merged

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@CarsonRoscoeCarsonRoscoeCarsonRoscoe approved these changes
@murrlincolnmurrlincolnmurrlincoln approved these changes

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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Universal Dark Mode - works on any site\n(function() {\n var enabled = true;\n \n function applyDarkMode() {\n if (!enabled) return;\n \n // Create style element if it doesn't exist\n var style = document.getElementById('universal-dark-mode-style');\n if (!style) {\n style = document.createElement('style');\n style.id = 'universal-dark-mode-style';\n document.head.appendChild(style);\n }\n \n // Dark mode CSS - inverts colors but preserves images/video\n style.textContent = '\n /* Invert everything except media */\n html {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #1a1a2e !important;\n }\n \n /* Restore images, videos, iframes, canvas */\n img, video, iframe, canvas, svg, picture, [style*=\"background-image\"] {\n filter: invert(1) hue-rotate(180deg) !important;\n }\n \n /* Preserve specific elements that should not be inverted */\n .no-dark-mode, .no-dark-mode *,\n [data-theme=\"light\"], [data-theme=\"light\"],\n .ace_editor, .ace_editor *,\n .CodeMirror, .CodeMirror *,\n .monaco-editor, .monaco-editor *,\n .markdown-body pre, .markdown-body pre *,\n .highlight, .highlight *,\n pre code, pre code * {\n filter: none !important;\n }\n \n /* Fix common UI elements */\n .modal, .popup, .dropdown-menu, .tooltip, .popover {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #2d2d44 !important;\n border-color: #444 !important;\n }\n \n /* Scrollbars */\n ::-webkit-scrollbar { background: #1a1a2e !important; }\n ::-webkit-scrollbar-thumb { background: #444 !important; }\n ::-webkit-scrollbar-thumb:hover { background: #555 !important; }\n \n /* Selection */\n ::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ';\n }\n \n function removeDarkMode() {\n var style = document.getElementById('universal-dark-mode-style');\n if (style) style.remove();\n }\n \n // Toggle with Alt+Shift+D\n document.addEventListener('keydown', function(e) {\n if (e.altKey && e.shiftKey && e.key === 'D') {\n e.preventDefault();\n enabled = !enabled;\n if (enabled) {\n applyDarkMode();\n console.log('[Universal Dark Mode] Enabled');\n } else {\n removeDarkMode();\n console.log('[Universal Dark Mode] Disabled');\n }\n }\n });\n \n // Apply on load\n applyDarkMode();\n \n // Re-apply on dynamic content\n var observer = new MutationObserver(function(mutations) {\n if (enabled && !document.getElementById('universal-dark-mode-style')) {\n applyDarkMode();\n }\n });\n observer.observe(document.head, { childList: true });\n \n console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');\n})();", "Universal Dark Mode");
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();

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Fix unit issues in balance/transfer actions - #835
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CarsonRoscoe merged 6 commits into
coinbase:mainfrom 
phdargen:fixBalanceFormat
Sep 5, 2025
Merged
Fix unit issues in balance/transfer actions#835
CarsonRoscoe merged 6 commits into
coinbase:mainfrom 
phdargen:fixBalanceFormat
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@phdargen
@phdargenphdargen
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Sep 4, 2025•

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Description
Fixes issues for native/erc20 balance actions reported by @Story91:
  • get_wallet_details returns ETH amount in wei, LLM converts this to whole units in message to user. Result of conversion depends on LLM knowledge, gpt-4o-mini always got it wrong in my tests
    
-> get_wallet_details returns now both amount in wei and whole units
  • when several erc20 token balances are queried in one prompt, default rpc might throw error due to rate limits
    
-> made rpc calls more efficient using multicall
  • when prompting eg "fetch usdc balance", LLM often hallucinates address (for example taking usdc address from mainnet, not base)
    
-> refined action description + added new action to retrieve commonly used token addresses by symbol for given network
In addition, the following improvements are made:
  • WalletActionProvider native_transfer takes amount in whole units as input and passes this to walletProviders. However, most of them expect atomic units instead -> this is now handled consistently as follows: action takes whole unit format as input, converts to atomic units and then calls internal native_transfer from walletProviders with that
  • remove hardcoded erc20 abi in favor of viem export
  • added guardrails for erc20 transfers to prevent loss of funds by sending to token contracts
  • added optional address arg (default to wallet address) to get_balance erc20 action
  • fixed examples/langchain-cdp-chatbot /chatbot.ts to correctly configure CdpSolanaWalletProvider
  • fixed native sol transfers for CdpSolanaWalletProvider that was throwing Error during transfer: Error: Signature must be 64 bytes long
Tests
Chatbot: typescript/examples/langchain-cdp-chatbot/chatbot.ts
Network: Base mainnet
Prompt: wallet info
-------------------
Wallet Details:
- Provider: cdp_evm_wallet_provider
- Address: 0xf2d4580ADfe8E012f5550322706d62DF11fDBE21
- Network:
* Protocol Family: evm
* Network ID: base-mainnet
* Chain ID: 8453
- Native Balance: 411444858090719 WEI
- Native Balance: 0.000411444858090719 ETH
-------------------
Here are the details of your wallet:
- **Address:** 0xf2d4580ADfe8E012f5550322706d62DF11fDBE21
- **Provider:** cdp_evm_wallet_provider
- **Network:**
- **Protocol Family:** EVM
- **Network ID:** base-mainnet
- **Chain ID:** 8453
- **Native Token Balance:** 0.000411444858090719 ETH
-------------------
Prompt: fetch usdc and cbbtc balance
-------------------
Token address for USDC on base-mainnet: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
-------------------
-------------------
Balance of USD Coin (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) at address 0xf2d4580ADfe8E012f5550322706d62DF11fDBE21 is 0.231121
-------------------
Here are your balances for USDC and CBBTC:
- **USDC Balance:** 0.231121 USDC
- **CBBTC Balance:** 0.00000024 CBBTC
If you need any further assistance, let me know!
-------------------
Prompt: check bankr balance
-------------------
Error: Token symbol "BANKR" not found on base-mainnet. Available token symbols on base-mainnet: USDC, EURC, CBBTC, CBETH, WETH, ZORA, AERO, BNKR, CLANKER
-------------------
-------------------
Token address for BNKR on base-mainnet: 0x22af33fe49fd1fa80c7149773dde5890d3c76f3b
-------------------
-------------------
Balance of BankrCoin (0x22af33fe49fd1fa80c7149773dde5890d3c76f3b) at address 0xf2d4580ADfe8E012f5550322706d62DF11fDBE21 is 0
-------------------
Your balance for BankrCoin (BNKR) is **0**. If you need assistance with anything else, feel free to ask!
-------------------
Prompt: send 0.001 usdc to 0xa8c1a5D3C372C65c04f91f87a43F549619A9483f
Transferred 0.001 of USD Coin (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) to 0xa8c1a5D3C372C65c04f91f87a43F549619A9483f.
Transaction hash for the transfer: 0xfc070337f72b5e154e556d007efc6418ff8c74bcc29c087107e07efdcc16daf2
-------------------
I have successfully transferred **0.001 USDC** to the address **0xa8c1a5D3C372C65c04f91f87a43F549619A9483f**. The transaction hash is: **0xfc070337f72b5e154e556d007efc6418ff8c74bcc29c087107e07efdcc16daf2**.
If you need anything else, just let me know!
-------------------
Prompt: send 0.000001 eth to 0xa8c1a5D3C372C65c04f91f87a43F549619A9483f
-------------------
Transferred 0.000001 ETH to 0xa8c1a5D3C372C65c04f91f87a43F549619A9483f
Transaction hash: 0xeafcac9aa1beb05a2dd72362741939287b6b951ef70a96de38252d5270b08221
-------------------
I have successfully transferred **0.000001 ETH** to the address **0xa8c1a5D3C372C65c04f91f87a43F549619A9483f**.
The transaction hash is: **0xeafcac9aa1beb05a2dd72362741939287b6b951ef70a96de38252d5270b08221**.
Prompt: check usdc balance for 0xa8c1a5D3C372C65c04f91f87a43F549619A9483f
----------
Balance of USD Coin (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) at address 0xa8c1a5D3C372C65c04f91f87a43F549619A9483f is 9.076885
-------------------
The balance of USDC for the address **0xa8c1a5D3C372C65c04f91f87a43F549619A9483f** is **9.076885 USDC**.

Chatbot: typescript/examples/langchain-cdp-chatbot/chatbot.ts
Network: Solana devnet
Prompt: send 0.0001 sol to 91sEBA6DLKakGV4raqW2pE8bmQR1D9dnbdGTjtATur5U -------------------
Transferred 0.0001 SOL to 91sEBA6DLKakGV4raqW2pE8bmQR1D9dnbdGTjtATur5U
Signature: 45MJKkm5CEQbCED8s7Ykz8P8bFySyqXq8AoLWzXW2NXUMMWwW2hcUs22yux1M9q5RHvcUGvcVbgHyy3sHGVC6CyM
-------------------
The transfer of 0.0001 SOL to the address **91sEBA6DLKakGV4raqW2pE8bmQR1D9dnbdGTjtATur5U** has been successfully completed. Transaction Signature: **45MJKkm5CEQbCED8s7Ykz8P8bFySyqXq8AoLWzXW2NXUMMWwW2hcUs22yux1M9q5RHvcUGvcVbgHyy3sHGVC6CyM**

Checklist
A couple of things to include in your PR for completeness:
  •  Added documentation to all relevant README.md files
  •  Added a changelog entry
@cb-heimdall
cb-heimdall
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Fantastic work, ty! Lots of little chores we've been meaning to get to all wrapped up in one nice package
@CarsonRoscoe
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@CarsonRoscoeCarsonRoscoeCarsonRoscoe approved these changes
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