# Tron · Integra

> On Tron, the TRC-20 transfer’s memo holds the ATR hash.

URL: https://integraledger.com/rails/tron

Payment rail

## Tron

On Tron, the TRC-20 transfer’s memo holds the ATR hash. [Source: lcp docs: rails⁠ (opens in a new tab)](https://github.com/IntegraLedger/integra-protocol/blob/66274bf/docs/guides/rails.md)

**Sources (1)**

[lcp docs: rails⁠ (opens in a new tab)](https://github.com/IntegraLedger/integra-protocol/blob/66274bf/docs/guides/rails.md)

### Where the ATR hash rides

On this rail, the ATR hash rides in the TRC-20 transfer’s memo.

#### The standard

An x402 facilitator for this profile is published: `@integraledger/profile-facilitator`. [Source: @integraledger/profile-facilitator README⁠ (opens in a new tab)](https://github.com/IntegraLedger/integra-agentic-connectors/blob/48500fe/profile-facilitator/README.md)

- The TRC-20 transfer’s memo, `raw_data.data`: H’s LCP string. [Source: lcp docs: rails⁠ (opens in a new tab)](https://github.com/IntegraLedger/integra-protocol/blob/66274bf/docs/guides/rails.md)

  `x402/exact/tron/lcp-trc20-memo`

Entry points: `@integraledger/lcp/tron`

#### The data

Read from the published packages when the site was built; nothing here is typed by hand.

The ATR hash of the site’s example ATR, as this rail carries it

H’s LCP string, as `raw_data.data`

lcp:sha256:0x8448dc1b716a5103287cb8f35e36b614ffd91e630ab8b7911833c54748ad5ca6

Computed from the site’s example ATR by this rail’s own helper in the package, when the site was built.

### What a payment on this rail proves

Of these 1 pairings, 1 have the buyer’s signature cover the ATR hash, 1 leave a public proof of it, and 1 let anyone read it back from the chain alone. [Source: lcp docs: pairings reference⁠ (opens in a new tab)](https://github.com/IntegraLedger/integra-protocol/blob/66274bf/docs/reference/pairings.md)

Switch to Technical to see each pairing, and the sentence its record states about what a payment through it proves.

#### The standard

- **`x402/exact/tron/lcp-trc20-memo` Native Field Buyer signs H: yes H on chain: yes Public proof: yes Recoverable from chain: yes**

  Pattern: [Native Field (LCP §8.3.1)⁠ (opens in a new tab)](https://github.com/legal-context-protocol/legal-context-protocol/blob/c8df26d/spec/legal-context-protocol-v1.md#831-native-field)

  Where the ATR hash rides: The TRC-20 transfer’s memo, `raw_data.data`: H’s LCP string.

  What a payment through it proves: The payer signed a Tron transaction whose memo is this ATR's hash in LCP string form, and whose one contract calls transfer on the token. The network verified the signature, which covers the memo through the transaction id. The call succeeded with the token's Transfer event, at the finality recorded. The memo is on chain in the transaction. This does not show that amount, payee, token or timing match the ATR's content.

  LCP profile: [x402/exact/tron/lcp-trc20-memo⁠ (opens in a new tab)](https://github.com/IntegraLedger/integra-protocol/blob/66274bf/lcp/profiles/x402-exact-tron-lcp-trc20-memo.md)

### Reading the settlement

The package reads a payment’s settlement through a reader you supply: the endpoint, the credentials, the timeouts and the retries are yours. A reader that fails never makes a payment read as failed. [Source: lcp docs: reading settlement⁠ (opens in a new tab)](https://github.com/IntegraLedger/integra-protocol/blob/66274bf/docs/guides/rails.md#reading-settlement)

**Sources (1)**

[lcp docs: reading settlement⁠ (opens in a new tab)](https://github.com/IntegraLedger/integra-protocol/blob/66274bf/docs/guides/rails.md#reading-settlement)

#### The standard

**Reader**

`TronReader`

**Its calls**

the latest solidified block, read first; `gettransactioninfobyid` at the solidified or head level; `gettransactionbyid`

**A settled read carries**

`solidified` or `head` [Source: lcp docs: reading settlement⁠ (opens in a new tab)](https://github.com/IntegraLedger/integra-protocol/blob/66274bf/docs/guides/rails.md#reading-settlement)

### The protocols that pay on it

- [x402](https://integraledger.com/protocols/x402)

[lcp docs: rails⁠ (opens in a new tab)](https://github.com/IntegraLedger/integra-protocol/blob/66274bf/docs/guides/rails.md)