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feat(request): EVM and x402 offers from a remote payer (stack 5/6) - #278
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This was referenced Oct 18, 2026
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tempo request now considers MPP evm charges and x402 exact offers (unless --funding off), on a chain in the destination table and in its USDC: Base for mainnet, Base Sepolia for testnet, plus TEMPO_DEV_CHAINS destinations. An offer elsewhere, in another token, or for another EIP-3009 domain is refused before signing. Mppx's evm method signs exactly the selected offer. The payer is the wallet's remote payer (D2): one secp256k1 key per wallet, created on first use under a file lock and kept in remote-payers.json (0600) beside the wallet store, which the CLI and the accounts SDK rewrite whole. The key never appears in output; whoami reports its address and USDC. A --private-key signer pays for itself. Offers are ranked deterministically: a Tempo offer in a held token, a Tempo offer a DEX swap funds, an EVM offer the payer already funds, then (with --funding auto) one to bridge; --payment-network overrides. Balances are read only when both kinds are offered. An unfunded payer is refused before signing with its address. --dry-run quotes EVM offers without creating a payer.
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5/6 — Phase 3. Pays MPP
evmcharges and x402exactoffers in USDC on Base (Base Sepolia on testnet) from a per-wallet remote payer key, created on first use in~/.tempo/wallet/remote-payers.json(0600; not store.json, which the CLI and the accounts SDK rewrite whole). Offers outside the destination table, in another token, or for another EIP-3009 domain are refused before signing. Deterministic ranking with--payment-network;whoamishowsremote_payer. Security review requested for the key handling.Paired PRs
main): mppx-1 auto-swap allowlist and OUSD default feat(tempo): auto-swap allowlist (autoSwap.fallback) and OUSD in the default currencies wevm/mppx#1054 · mppx-3 auto-swap reads without the account fix(tempo): read auto-swap balances and quotes without the account wevm/mppx#1055wallet-cli vendors machine-fetch
main@ d168943 (0.3.0) and mppxbrendan/wallet-cli-needs@ 8295134 (mppx@0.12.0+ the commits merged upstream as 82810df and 0acc2bc), pinned by commit until we choose to upgrade.